IGCSE360 Dictionary

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3,131 simple definitions with practical examples, covering nine Cambridge and Pearson Edexcel subject collections. Browse alphabetically, search for a term, or filter by subject and chapter.

IGCSE360 Dictionary

3,131 simple definitions with practical examples, covering nine Cambridge and Pearson Edexcel subject collections. Browse alphabetically, search for a term, or filter by subject and chapter.

3,131 terms shown

1 Dictionary terms

Mathematics

12-hour clock

A system using a.m. and p.m. to distinguish morning and afternoon.

Example: 14:00 in the 24-hour clock is 2:00 p.m.

Read in:Chapter 15

2 Dictionary terms

Mathematics

24-hour clock

A way of stating time using hours from 00 to 23.

Example: 8:30 p.m. is 20:30.

Read in:Chapter 15

3 Dictionary terms

Computer Science

3D printer

A device that builds a solid object layer by layer.

Example: A designer prints a prototype from plastic.

Read in:Topic 3.2
ICT

3D printer

A machine that builds a three-dimensional object layer by layer.

Example: A design class prints a plastic model.

Read in:Chapter 2

5 Dictionary terms

Edexcel Business

5S

A workplace-organisation method: sort, set in order, shine, standardise and sustain.

Example: Workers label storage spaces so tools are easy to find.

Read in:Chapter 42

A Dictionary terms

Mathematics

AA similarity

A triangle similarity rule: two matching angles are equal.

Example: Two triangles with angles 40° and 60° both have the same shape.

Read in:Chapter 35
Computer Science

Abnormal test data

Invalid values that a system should reject or handle safely.

Example: Entering letters instead of a number is abnormal data.

Read in:Topic 7.6
ICT

Abnormal test data

Invalid data that should be rejected.

Example: Age 25 is abnormal data for an 11–18 range.

Read in:Chapter 7
AS & A Level Business

Above-the-line promotion

Paid advertising through mass media such as television or radio.

Example: A national television campaign promotes a new snack.

Read in:Topic 3.3
Edexcel Business

Above-the-line promotion

Paid advertising through mass media such as television or radio.

Example: A national television campaign promotes a new snack.

Read in:Chapter 39
AS & A Level Business

Absenteeism

Time employees are absent when they were expected to work.

Example: Repeated unplanned absences disrupt a factory shift.

Read in:Topic 2.1
AS & A Level Economics

Absolute advantage

Producing a good using fewer resources than another producer.

Example: One farm grows more wheat per hectare than another.

Read in:Chapter 12
Economics

Absolute advantage

Producing a good using fewer resources than another producer.

Example: One farm grows more wheat per hectare than another.

Read in:Chapter 36
Mathematics

Absolute error

The size of the difference between an estimated or measured value and the exact value.

Example: If the exact length is 10 and the estimate is 9.8, the absolute error is 0.2.

Read in:Chapter 10
Accounting

Absolute figures

The actual money amounts shown in financial statements, before expressing them as ratios.

Example: A profit of $20,000 is an absolute figure.

Read in:Chapter 23
AS & A Level Economics

Absolute poverty

Being unable to afford the basic essentials for living.

Example: Someone lacks enough money for food and safe shelter.

Read in:Chapter 22
Economics

Absolute poverty

Being unable to afford the basic essentials for living.

Example: Someone lacks enough money for food and safe shelter.

Read in:Chapter 33
Computer Science

Abstraction

Focusing on the important details while leaving out unnecessary ones.

Example: A road map shows routes but not every tree.

Read in:Topic 7.1
Mathematics

Acceleration

The change in velocity each unit of time.

Example: Increasing speed from 4 to 10 m/s in 3 s gives 2 m/s² acceleration.

AS & A Level Economics

Accelerator theory

The idea that firms' investment responds to changes in demand or output.

Example: Rising sales encourage a manufacturer to buy more machines.

Read in:Chapter 24
ICT

Access time

The time a storage device takes to locate and begin reading data.

Example: An SSD usually has lower access time than a tape drive.

Read in:Chapter 3
ICT

Accessibility

Designing information and technology so people with different needs can use it.

Example: Subtitles help someone who cannot hear a video.

Read in:Chapter 9
Accounting

Account balance

The difference between the debit and credit totals in an account.

Example: If cash debits total $600 and credits $200, the debit balance is $400.

Read in:Chapter 3
AS & A Level Business

Accountability

Being required to explain and take responsibility for actions and results.

Example: Directors report company performance to shareholders.

Edexcel Business

Accountability

Being required to explain and take responsibility for actions and results.

Example: Directors report company performance to shareholders.

Read in:Chapter 23
Accounting

Accounting

Recording and using financial information to understand how a business is doing.

Example: An owner checks accounts to decide whether to expand.

Read in:Chapter 1
Accounting

Accounting equation

The rule that assets equal capital plus liabilities.

Example: Assets $12,000 = capital $8,000 + liabilities $4,000.

Accounting

Accounting estimate

An informed judgement used where an exact amount is unknown.

Example: A company estimates the useful life of a delivery van.

Read in:Chapter 27
Accounting

Accounting method

A rule or approach used to measure and record a financial item.

Example: Two firms may choose different depreciation methods.

Read in:Chapter 23
Accounting

Accounting period

A set length of time for which a business prepares accounting reports.

Example: A company prepares accounts for 1 January to 31 December.

Read in:Chapter 26
Accounting

Accounting policy

A specific method a business chooses to apply accounting principles.

Example: A firm chooses straight-line depreciation for machines.

Read in:Chapter 27
AS & A Level Business

Accounting rate of return

Average annual accounting profit as a percentage of the investment measure used.

Example: Average profit of $2,000 on $20,000 initial cost gives 10% ARR.

Read in:Topic 10.3
Accounting

Accounting ratio

A calculation comparing figures from financial statements to help assess performance.

Example: Comparing gross profit with revenue gives gross margin.

Edexcel Business

Accounts payable

Amounts a business owes suppliers for purchases made on credit.

Example: A café owes its coffee supplier £500.

Read in:Chapter 30
Edexcel Business

Accounts receivable

Amounts owed to a business by customers who bought on credit.

Example: A wholesaler is owed £800 by a retailer that bought on credit.

Read in:Chapter 30
Accounting

Accrual

An expense or income belonging to the current period but not yet paid or received.

Example: December electricity used but paid in January is an accrual.

Read in:Chapter 12
Accounting

Accrued expense

An expense incurred but not paid by the end of the accounting period.

Example: $120 wages still owed at year-end are an accrued expense.

Read in:Chapter 12
Accounting

Accrued income

Income earned but not yet received by the end of the period.

Example: Rent for December due in January is accrued income.

Read in:Chapter 12
Accounting

Accumulated depreciation

The total depreciation charged on an asset since it was bought.

Example: An asset has $900 accumulated depreciation after three years.

Read in:Chapter 11
Edexcel Business

Accumulated depreciation

The total depreciation charged on an asset since it was bought.

Example: An asset has $900 accumulated depreciation after three years.

Read in:Chapter 30
Accounting

Accumulated fund

A club's total funds built up from past surpluses and contributions, less deficits.

Example: Assets of $9,000 minus liabilities of $2,000 give a $7,000 fund.

Read in:Chapter 18
Computer Science

Accumulator

A CPU register used for intermediate calculation results.

Example: The result of an addition may be stored in the accumulator.

Read in:Topic 3.1
Computer Science

Accumulator variable

A variable used to build up a total or result.

Example: total ← total + price updates the running sum.

Read in:Topic 7.4
Business Studies

Acid test ratio

A liquidity ratio that excludes inventory from current assets.

Example: A firm removes stock from current assets before comparing with current liabilities.

Read in:Chapter 26
Edexcel Business

Acid test ratio

A liquidity ratio that excludes inventory from current assets.

Example: A firm removes stock from current assets before comparing with current liabilities.

Read in:Chapter 31
AS & A Level Business

Acid-test ratio

Current assets excluding inventory, divided by current liabilities.

Example: Quick assets of $40,000 and liabilities of $20,000 give 2:1.

Read in:Topic 10.2
Computer Science

Acknowledgement

A message confirming that data was received.

Example: A device sends an acknowledgement after a valid packet.

Read in:Topic 2.2
AS & A Level Economics

Actual economic growth

An increase in real GDP produced over a period.

Example: A country producing 3% more real output in a year has actual growth.

Read in:Chapter 8
Computer Science

Actuator

An output device that causes a physical action.

Example: A motor opens a barrier when instructed.

ICT

Actuator

A component that makes a physical action happen after receiving a control signal.

Example: A motor opens an automatic greenhouse window.

Read in:Chapter 2
Mathematics

Acute angle

An angle bigger than 0° but smaller than 90°.

Example: 45° is acute.

Read in:Chapter 32
AS & A Level Economics

Ad valorem tax

An indirect tax charged as a percentage of a product's price.

Example: A 10% sales tax adds $5 to a $50 product.

Read in:Chapter 21
AS & A Level Economics

Adaptive expectations

Forecasts formed largely from what happened previously.

Example: After several years of high inflation, workers expect more price rises.

Read in:Chapter 28
Business Studies

Added value

The extra value a business creates by selling a product for more than the cost of its bought-in materials.

Example: A café turns $2 of ingredients into a $6 sandwich.

Read in:Chapter 1
AS & A Level Business

Added value

The difference between what a business sells an item for and the cost of bought-in materials and components.

Example: A chair sells for $80 after $35 of materials, adding $45 of value.

Read in:Topic 1.1
Edexcel Business

Added value

The extra value a business creates by selling a product for more than the cost of its bought-in materials.

Example: A café turns $2 of ingredients into a $6 sandwich.

Read in:Chapter 1
Mathematics

Addition

Combining quantities to find their total.

Example: 7 + 5 = 12.

Read in:Chapter 6
Accounting

Additional capital

Extra money or assets introduced into the business by the owner.

Example: The owner adds another $2,000 of savings.

Read in:Chapter 20
Edexcel Business

Administrative expenses

Costs of running the office and managing the business.

Example: Office rent and administrative salaries are expenses.

Read in:Chapter 29
AS & A Level Economics

Adverse selection

When hidden information leads to higher-risk participants being overrepresented.

Example: High-risk customers may be more likely to buy insurance at a single price.

AS & A Level Business

Adverse variance

A difference that worsens the business's position compared with the budget.

Example: Material costs are $900 higher than budgeted.

Read in:Topic 5.5
Business Studies

Advertising

Paid messages designed to inform or persuade an audience.

Example: A business pays for an online video advert.

Edexcel Business

Advertising

Paid messages designed to inform or persuade an audience.

Example: A business pays for an online video advert.

Read in:Chapter 39
ICT

Adware

Software that shows unwanted advertising, sometimes excessively.

Example: An unwanted program keeps opening advert windows.

Read in:Chapter 8
Accounting

Ageing of receivables

Grouping customer debts by how long they have been unpaid.

Example: Invoices are sorted into 0–30, 31–60 and over 60 days.

Read in:Chapter 13
AS & A Level Economics

Ageing population

A population with a rising proportion of older people.

Example: Longer life expectancy increases the share of elderly residents.

Read in:Chapter 5
Economics

Ageing population

A population with a rising proportion of older people.

Example: Longer life expectancy increases the share of elderly residents.

Read in:Chapter 34
Edexcel Business

Agent

A person or business that arranges sales on behalf of another.

Example: A travel agent books holidays for customers.

Read in:Chapter 38
AS & A Level Economics

Aggregate demand

Total planned spending on an economy's output at each overall price level.

Example: AD includes household consumption, investment, government spending and net exports.

AS & A Level Economics

Aggregate expenditure

Total intended spending on goods and services in an economy.

Example: A rise in investment raises aggregate expenditure.

AS & A Level Economics

Aggregate supply

Total output firms are willing and able to produce at each overall price level.

Example: AS may rise when businesses hire more workers and increase production.

Mathematics

Algebra

Mathematics using letters and symbols to represent numbers and relationships.

Example: In x + 3 = 7, x represents an unknown number.

Read in:Chapter 19
Mathematics

Algebraic fraction

A fraction containing letters in its numerator, denominator or both.

Example: (x + 2)/3 is an algebraic fraction.

Read in:Chapter 21
Computer Science

Algorithm

A clear sequence of steps used to solve a problem.

Example: A recipe for sorting names alphabetically is an algorithm.

Computer Science

Algorithm design

Planning clear steps that solve a problem correctly.

Example: A student designs a routine to calculate a total bill.

Read in:Topic 7.9
AS & A Level Economics

Allocative efficiency

When resources produce the goods and quantities society values most, often where social marginal benefit equals social marginal cost.

Example: A market is allocatively efficient when MSB equals MSC.

AS & A Level Economics

Allocative function of prices

How prices guide scarce resources towards products people value relatively highly.

Example: Rising demand raises prices and attracts firms into the market.

Read in:Chapter 4
Mathematics

Alternate angles

Angles on opposite sides of a transversal between parallel lines; they are equal.

Example: An alternate angle to 45° is 45°.

Read in:Chapter 37
Mathematics

Alternate segment theorem

The angle between a tangent and chord equals the angle in the opposite segment of the circle.

Example: An angle of 35° between tangent and chord gives 35° in the alternate segment.

Read in:Chapter 38
ICT

Analogue data

Information that changes smoothly and continuously.

Example: The temperature outside changes continuously.

Read in:Chapter 1
Computer Science

Analogue signal

A signal that changes continuously.

Example: The air pressure variations in a person's voice are analogue.

Read in:Topic 1.2
Computer Science

Analogue-to-digital converter

A component that changes analogue readings into digital values.

Example: An ADC converts a temperature sensor's voltage into numbers.

Read in:Topic 6.1
ICT

Analogue-to-digital converter

A device that changes a continuously varying signal into digital values.

Example: A temperature sensor's signal is converted for a computer.

Read in:Chapter 2
Computer Science

Analysis

Understanding the problem and what the solution must do.

Example: A developer lists the inputs and outputs for an app.

Read in:Topic 7.1
Computer Science

AND gate

A gate that outputs 1 only when every input is 1.

Example: 1 AND 1 gives 1.

Read in:Topic 10.2
Mathematics

Angle at the centre

An angle with its vertex at the circle's centre.

Example: A central angle is twice an angle at the circumference on the same arc.

Read in:Chapter 38
Mathematics

Angle bisector

A line that divides an angle into two equal angles.

Example: A bisector divides 80° into two 40° angles.

Read in:Chapter 33
Mathematics

Angle of depression

The angle measured downward from a horizontal line to something below you.

Example: Looking down from a balcony forms an angle of depression.

Read in:Chapter 41
Mathematics

Angle of elevation

The angle measured upward from a horizontal line to something above you.

Example: Looking up at a tall building forms an angle of elevation.

Read in:Chapter 41
Business Studies

Annual general meeting

A yearly meeting where company shareholders can discuss important matters and vote.

Example: Shareholders vote on directors at the annual general meeting.

Read in:Chapter 4
Edexcel Business

Annual general meeting

A yearly meeting where company shareholders can discuss important matters and vote.

Example: Shareholders vote on directors at the annual general meeting.

Read in:Chapter 4
AS & A Level Business

Annual report

A yearly report explaining a company's activities, results and financial position.

Example: Shareholders read the annual report before voting.

Read in:Topic 10.4
AS & A Level Business

Ansoff Matrix

A framework comparing ways to grow using existing or new products and markets.

Example: A retailer sells existing products in a new country.

Read in:Topic 6.2
ICT

Anti-malware software

Software that helps detect, block and remove malicious programs.

Example: Security software quarantines an infected file.

Read in:Chapter 8
ICT

Anti-virus software

Software that detects and helps remove computer viruses and other malware.

Example: An anti-virus scan warns about an infected download.

Read in:Chapter 4
Computer Science

Append mode

Opening a file to add new data to the end.

Example: A log file receives another entry without losing older ones.

Read in:Topic 8.3
Edexcel Business

Application form

A document used by a person applying for a job.

Example: A candidate lists experience on the employer's application form.

Read in:Chapter 18
Computer Science

Application software

Software that helps users carry out particular tasks.

Example: A word processor is application software.

Read in:Topic 4.1
ICT

Application software

Programs used to complete a task for the user.

Example: A spreadsheet helps a student calculate costs.

Read in:Chapter 1
AS & A Level Business

Appraisal

A formal review of an employee's performance and development needs.

Example: A manager discusses targets at an annual appraisal.

Read in:Topic 2.1
Business Studies

Appreciation

When a currency rises in value compared with another currency.

Example: A stronger local currency makes imported goods cheaper.

Read in:Chapter 29
Edexcel Business

Appreciation

When a currency rises in value compared with another currency.

Example: A stronger local currency makes imported goods cheaper.

Read in:Chapter 11
Accounting

Appropriation account

A partnership account showing how profit is divided between partners.

Example: The account deducts partners' salaries before sharing remaining profit.

Read in:Chapter 16
Mathematics

Approximation

A value that is close to the exact answer.

Example: 3.14 is an approximation for π.

Read in:Chapter 9
Mathematics

Arc

Part of a circle's curved edge.

Example: A semicircle is an arc spanning half a circle.

Read in:Chapter 38
Mathematics

Area

The amount of flat space inside a shape.

Example: A 4 cm by 3 cm rectangle has area 12 cm².

Read in:Chapter 40
Mathematics

Area scale factor

The square of the length scale factor.

Example: If lengths triple, areas become 9 times as large.

Read in:Chapter 35
Mathematics

Area unit

A squared unit used to measure a flat surface.

Example: A floor can cover 20 m².

Read in:Chapter 39
Computer Science

Arithmetic logic unit

The CPU component that performs calculations and logic operations.

Example: The ALU adds two numbers or compares values.

Read in:Topic 3.1
Mathematics

Arithmetic sequence

A sequence with the same difference between consecutive terms.

Example: 5, 8, 11, 14 increases by 3 each time.

Read in:Chapter 25
Computer Science

Array

A collection of values stored under one name and accessed by index.

Example: scores[1] stores one score in an array.

Read in:Topic 8.2
Computer Science

Array bounds

The lowest and highest valid index positions of an array.

Example: A ten-item array might use indexes 1 to 10.

Read in:Topic 8.2
Computer Science

Artificial intelligence

Computer systems that perform tasks associated with human intelligence, such as recognising patterns or making decisions.

Example: A system recognises faces in photographs.

Read in:Topic 6.3
ICT

Artificial intelligence

Computer technology designed to perform tasks that normally require human intelligence.

Example: A photo app recognises objects in an image.

Read in:Chapter 1
Mathematics

Ascending order

Arranging numbers from smallest to largest.

Example: −2, 1, 5 is ascending order.

Read in:Chapter 5
Computer Science

ASCII

A character code used to represent letters, digits and symbols.

Example: Standard ASCII uses 7 bits for a character.

Read in:Topic 1.2
Computer Science

Assembler

A program that translates assembly language into machine code.

Example: An assembler converts symbolic instructions for a processor.

Read in:Topic 4.2
Computer Science

Assembly language

A low-level language using short instruction names.

Example: MOV is an assembly instruction on some processors.

Read in:Topic 4.2
Accounting

Asset

Something valuable that a business owns or controls.

Example: A delivery van is an asset.

Business Studies

Asset

Something valuable a business owns or controls.

Example: Cash and machinery are assets.

Accounting

Asset improvement

Spending that increases an asset's usefulness or capacity.

Example: Adding a larger motor to machinery can be capital expenditure.

Read in:Chapter 10
Computer Science

Assignment

Storing a value in a variable.

Example: total ← 10 assigns 10 to total.

Read in:Topic 8.1
Computer Science

Asymmetric encryption

Encryption that uses a related public key and private key.

Example: A sender encrypts data with the recipient's public key.

Read in:Topic 2.3
AS & A Level Economics

Asymmetric information

When one party to a transaction knows more relevant information than the other.

Example: A used-car seller knows about a fault the buyer cannot see.

Mathematics

Asymptote

A straight line a curve approaches but does not reach in that direction.

Example: For y = 1/x, the y-axis is a vertical asymptote.

Read in:Chapter 29
ICT

Audience appreciation

Thinking about who will use information so it is suitable for them.

Example: A designer chooses clear language for younger students.

Read in:Chapter 9
ICT

Audio conferencing

A meeting using sound but not necessarily video.

Example: A team holds a voice-only conference call.

Read in:Chapter 4
Edexcel Business

Auditors

Independent professionals who examine financial records and provide an audit opinion.

Example: Auditors assess whether a company's accounts are fairly presented.

Read in:Chapter 32
ICT

Augmented reality

Digital information placed over a view of the real world.

Example: A phone shows directions over a live camera view.

Read in:Chapter 1
ICT

Authentication

Checking that a person or device is who it claims to be.

Example: Entering a password can authenticate a user.

Read in:Chapter 4
AS & A Level Business

Authority

The official power to make decisions and give instructions.

Example: A department head can approve purchases up to $2,000.

Read in:Topic 7.1
Edexcel Business

Authority

The official power to make decisions and give instructions.

Example: A department head can approve purchases up to $2,000.

Read in:Chapter 23
AS & A Level Business

Autocratic leadership

A style where the leader makes decisions with little consultation.

Example: A leader gives direct instructions during an emergency.

Read in:Topic 7.3
Business Studies

Autocratic leadership

A leadership style where the leader makes decisions with little employee input.

Example: A manager sets the schedule without consulting staff.

Read in:Chapter 7
AS & A Level Business

Autocratic management

A style in which a manager makes decisions with little staff input.

Example: A manager decides shift patterns without consultation.

Read in:Topic 2.3
Computer Science

Automated system

A system that monitors inputs and controls a process with little human involvement.

Example: An automatic greenhouse controls watering.

Read in:Topic 6.1
ICT

Automated teller machine

A machine that provides banking services without a cashier.

Example: A customer withdraws cash at an ATM.

Read in:Chapter 6
ICT

Automatic control

A system that changes an output in response to sensor readings.

Example: A heater switches on when a room gets too cold.

Read in:Chapter 5
ICT

Automatic number plate recognition

Technology that reads vehicle registration numbers from images.

Example: A car park recognises a vehicle's number plate.

Read in:Chapter 6
Computer Science

Automatic repeat request

A system that asks for data to be sent again when an error is detected.

Example: The receiver requests another copy of a damaged packet.

Read in:Topic 2.2
AS & A Level Economics

Automatic stabilisers

Taxes and government benefits that soften economic fluctuations without new policy decisions.

Example: During a recession, tax receipts fall and unemployment benefits rise.

Business Studies

Automation

Using machines or computers to perform tasks with little human involvement.

Example: Robots weld car parts in a factory.

Read in:Chapter 18
Edexcel Business

Automation

Using machines or computers to perform tasks with little human involvement.

Example: Robots weld car parts in a factory.

Computer Science

Autonomous robot

A robot that can make some decisions and operate without continuous human control.

Example: A robot vacuum navigates around furniture.

Read in:Topic 6.2
AS & A Level Economics

Autonomous spending

Spending that does not depend directly on the current level of national income.

Example: Government orders may rise even before household income changes.

Read in:Chapter 24
ICT

Autonomous train

A train controlled automatically by computer systems.

Example: A metro train moves between stations automatically.

Read in:Chapter 5
ICT

Autonomous vehicle

A vehicle that uses sensors and computers to drive with limited or no human control.

Example: A driverless shuttle follows its planned route.

Read in:Chapter 5
AS & A Level Business

Average cost

Total cost divided by the number of units produced.

Example: A total cost of $2,000 for 100 units gives $20 per unit.

Read in:Topic 5.4
AS & A Level Economics

Average cost

Total cost divided by the number of units produced.

Example: $1,000 to make 100 items means an average cost of $10.

Business Studies

Average cost

The cost per unit produced.

Example: A total cost of $600 for 100 items means $6 per item.

Read in:Chapter 19
Economics

Average cost

Total cost divided by the number of units produced.

Example: $1,000 to make 100 items means an average cost of $10.

Read in:Chapter 22
Edexcel Business

Average cost

The cost per unit produced.

Example: A total cost of $600 for 100 items means $6 per item.

AS & A Level Economics

Average fixed cost

Fixed cost per unit of output, which falls as output rises.

Example: A $1,000 monthly rent spread over 100 items is $10 per item.

Read in:Chapter 17
AS & A Level Economics

Average product

Output produced per unit of an input.

Example: 100 items made by five workers means average product of 20 items.

Read in:Chapter 17
AS & A Level Economics

Average propensity to consume

The share of total disposable income spent on consumption.

Example: Spending $900 of $1,000 income gives APC of 0.9.

Read in:Chapter 24
AS & A Level Economics

Average propensity to save

The share of total disposable income saved.

Example: Saving $100 of $1,000 income gives APS of 0.1.

Read in:Chapter 24
AS & A Level Economics

Average revenue

Revenue received per unit sold.

Example: $300 revenue from 30 units gives average revenue of $10.

Read in:Chapter 18
Economics

Average revenue

Revenue received per unit sold.

Example: $300 revenue from 30 units gives average revenue of $10.

Read in:Chapter 22
AS & A Level Economics

Average variable cost

Variable cost divided by the number of units produced.

Example: $800 variable cost over 100 items gives AVC of $8.

Read in:Chapter 17
Mathematics

Axis of symmetry

A line around which a solid or shape has a symmetry property.

Example: A circular cylinder has a central symmetry axis.

Read in:Chapter 36

B Dictionary terms

ICT

Backing storage

Long-term storage that keeps files when the computer is off.

Example: An SSD stores documents and applications.

Read in:Chapter 1
ICT

Backup

An extra copy of data kept so it can be restored if lost or damaged.

Example: A school backs up student records each night.

Read in:Chapter 8
Accounting

Bad debt

Money owed by a customer that the business cannot collect.

Example: A customer closes down while owing $400.

Read in:Chapter 9
AS & A Level Economics

Balance of payments

A record of a country's economic transactions with the rest of the world.

Example: It records international trade and financial transactions.

Business Studies

Balance of payments

A record of a country's economic transactions with the rest of the world.

Example: Imports and exports are included in external trade accounts.

Read in:Chapter 27
Economics

Balance of payments

A record of a country's economic transactions with the rest of the world.

Example: It records international trade and financial transactions.

Read in:Chapter 39
Economics

Balance of payments stability

Avoiding unsustainable imbalances in transactions with other countries.

Example: A government seeks to reduce a persistent current-account deficit.

Read in:Chapter 25
Edexcel Business

Balance sheet

Another name for the statement of financial position, showing assets and liabilities at a date.

Example: A firm's balance sheet shows its financial position on 31 December.

Read in:Chapter 30
AS & A Level Economics

Balanced budget

When government revenue equals government spending.

Example: Both revenue and spending are $100 billion.

Read in:Chapter 11
Economics

Balanced budget

When government revenue equals government spending.

Example: Both revenue and spending are $100 billion.

Read in:Chapter 26
Computer Science

Bandwidth

The amount of data a connection can carry per second.

Example: A higher-bandwidth connection can transfer more data each second.

Read in:Topic 2.1
Accounting

Bank charges

Fees a bank takes for providing services or processing transactions.

Example: The bank deducts a $5 account fee.

Read in:Chapter 8
Economics

Bank deposit

Money kept in an account at a bank.

Example: A worker's salary is paid into a current account.

Read in:Chapter 16
AS & A Level Business

Bank loan

A fixed sum borrowed from a bank and repaid over time, usually with interest.

Example: A factory borrows $100,000 for equipment.

Read in:Topic 5.2
Business Studies

Bank loan

A sum borrowed from a bank and repaid over time, usually with interest.

Example: A business borrows $20,000 to buy a machine.

Read in:Chapter 22
Edexcel Business

Bank loan

A sum borrowed from a bank and repaid over time, usually with interest.

Example: A business borrows $20,000 to buy a machine.

Read in:Chapter 25
Accounting

Bank overdraft

When money paid out of a bank account exceeds the money available, creating a debt to the bank.

Example: A bank balance of minus $150 is an overdraft.

Business Studies

Bank overdraft

An arrangement allowing a business to spend more than the balance in its bank account, up to a limit.

Example: A shop uses an overdraft while waiting for customer payments.

Edexcel Business

Bank overdraft

An arrangement allowing a business to spend more than the balance in its bank account, up to a limit.

Example: A shop uses an overdraft while waiting for customer payments.

Accounting

Bank reconciliation

Checking differences between cash book and bank statement balances.

Example: An unpresented cheque explains why the two balances differ.

Read in:Chapter 8
Accounting

Bank statement

A record produced by the bank showing deposits, withdrawals and the account balance.

Example: A bank statement lists a salary receipt and a rent payment.

Read in:Chapter 8
Mathematics

Bar chart

A graph using separate bars to compare categories.

Example: A bar chart can show how many students choose each subject.

Read in:Chapter 46
Accounting

Bar trading account

A trading account for goods sold by a club's bar or café.

Example: A club café calculates gross profit on drink sales.

Read in:Chapter 18
Computer Science

Barcode reader

A device that reads printed barcodes.

Example: A supermarket scanner reads product codes.

Read in:Topic 3.2
ICT

Barcode reader

A device that reads a printed pattern of bars to identify an item.

Example: A supermarket scanner reads a product barcode.

Read in:Chapter 2
AS & A Level Economics

Barriers to entry

Obstacles that make it difficult for new businesses to enter a market.

Example: High setup costs can prevent new airlines entering.

Economics

Barriers to entry

Obstacles that make it difficult for new businesses to enter a market.

Example: High setup costs can prevent new airlines entering.

Read in:Chapter 23
AS & A Level Economics

Barter

Swapping goods or services directly without money.

Example: A farmer exchanges vegetables for a haircut.

Read in:Chapter 27
Economics

Barter

Swapping goods or services directly without money.

Example: A farmer exchanges vegetables for a haircut.

Read in:Chapter 16
Mathematics

Base

The number being multiplied repeatedly in a power.

Example: In 3⁴, the base is 3.

Read in:Chapter 7
AS & A Level Economics

Base year

The comparison period assigned an index value of 100.

Example: If 2020 is the base year, its consumer price index is 100.

Read in:Chapter 10
Economics

Basket of goods

A selected group of products used to track price changes.

Example: Food, transport and clothing are included in a price basket.

Read in:Chapter 31
AS & A Level Business

Batch production

Making groups of identical items before changing to another batch.

Example: A bakery makes 200 chocolate cakes then 200 vanilla cakes.

Read in:Topic 4.1
Business Studies

Batch production

Making a group of identical products together before changing to another group.

Example: A bakery makes 200 chocolate muffins, then 200 vanilla muffins.

Read in:Chapter 18
Edexcel Business

Batch production

Making a group of identical products together before changing to another group.

Example: A bakery makes 200 chocolate muffins, then 200 vanilla muffins.

Read in:Chapter 41
Mathematics

Bearing

A direction measured clockwise in degrees from north.

Example: East has a bearing of 090°.

Read in:Chapter 34
AS & A Level Business

Behavioural leadership theory

The view that leadership effectiveness depends on what leaders do.

Example: A leader balances task direction with employee support.

Read in:Topic 7.3
AS & A Level Business

Below-the-line promotion

Targeted promotional activities such as direct mail or sales promotions.

Example: A café gives loyalty cards to regular customers.

Read in:Topic 3.3
Edexcel Business

Below-the-line promotion

Targeted promotional activities such as direct mail or sales promotions.

Example: A café gives loyalty cards to regular customers.

Read in:Chapter 39
Accounting

Benchmark

A figure or standard used to compare business performance.

Example: A firm compares its profit margin with the industry average.

AS & A Level Business

Benchmarking

Comparing performance with recognised standards or strong competitors.

Example: A courier compares delivery times with the industry leader.

Mathematics

Best buy

The option giving the most useful quantity for the least comparable cost.

Example: A 2 L bottle for $3 is better value than 1 L for $2.

Read in:Chapter 16
Mathematics

Bias

A problem that makes a survey or sample unfairly favour certain results.

Example: Only asking football fans about sport creates bias.

Read in:Chapter 45
AS & A Level Economics

Bilateral monopoly

A labour market with one major employer and one strong union.

Example: A mining company negotiates wages with the only miners' union.

Read in:Chapter 23
Computer Science

Binary

A number system that uses only the digits 0 and 1.

Example: The number 5 is written as 101 in binary.

Computer Science

Binary addition

Adding numbers written in base two.

Example: 1 + 1 gives 10 in binary.

Read in:Topic 1.1
ICT

Biometrics

Identification based on a person's physical or behavioural features.

Example: A fingerprint unlocks a phone.

Read in:Chapter 4
ICT

BIOS

Startup firmware that checks essential hardware and begins the boot process.

Example: The BIOS checks key components when a PC starts.

Read in:Chapter 1
AS & A Level Economics

Birth rate

The number of live births each year per 1,000 people.

Example: A birth rate of 20 means 20 births per 1,000 people annually.

Read in:Chapter 30
Economics

Birth rate

The number of live births each year per 1,000 people.

Example: A birth rate of 20 means 20 births per 1,000 people annually.

Read in:Chapter 34
Computer Science

Bit

A single binary digit, either 0 or 1.

Example: The number 1010 contains four bits.

ICT

Blind carbon copy

An email field that hides recipients' addresses from one another.

Example: A club uses Bcc when emailing many members.

Read in:Chapter 10
Computer Science

Blockchain

A shared record of transactions stored in linked blocks.

Example: A blockchain records cryptocurrency transfers.

Read in:Topic 5.2
ICT

Blog

A website or section that publishes posts, often in date order.

Example: A student writes weekly posts about a science project.

Read in:Chapter 10
ICT

Blu-ray disc

An optical disc that can store more data than a DVD.

Example: A Blu-ray disc holds a high-definition film.

Read in:Chapter 3
AS & A Level Business

Blue ocean strategy

Trying to create a new market space instead of competing directly in an existing one.

Example: A business invents a service customers could not previously buy.

Read in:Topic 6.2
ICT

Bluetooth

Short-range wireless technology for connecting nearby devices.

Example: Wireless headphones connect to a phone via Bluetooth.

Read in:Chapter 4
Edexcel Business

Board of directors

A group elected or appointed to oversee a company's major decisions.

Example: Directors approve a new factory investment.

Read in:Chapter 4
Business Studies

Bonus

Extra pay given for meeting a target or good performance.

Example: A salesperson receives an extra $100 after meeting a target.

Read in:Chapter 6
Edexcel Business

Bonus

Extra pay given for meeting a target or good performance.

Example: A salesperson receives an extra $100 after meeting a target.

Read in:Chapter 22
Accounting

Book value

The amount at which an asset appears in the accounts after relevant adjustments.

Example: A machine costing $5,000 less $2,000 depreciation has book value $3,000.

Read in:Chapter 25
Accounting

Book-keeping

Recording a business's financial transactions in an organised way.

Example: A shop records its cash purchases each day.

Read in:Chapter 1
Accounting

Books of prime entry

Books used to record transactions before they are posted to ledger accounts.

Example: Credit sales are first entered in the sales journal.

Read in:Chapter 5
Computer Science

Boolean

A data type that has only TRUE or FALSE values.

Example: isLoggedIn is either TRUE or FALSE.

Read in:Topic 8.1
Computer Science

Boolean algebra

Rules for simplifying and combining Boolean expressions.

Example: A OR 0 = A in Boolean algebra.

Read in:Topic 10.3
Computer Science

Boolean expression

An expression using Boolean values and logic operations.

Example: A AND NOT B is a Boolean expression.

Read in:Topic 10.3
Computer Science

Boolean logic

Using TRUE/FALSE or 1/0 values to represent logical decisions.

Example: A burglar alarm uses Boolean conditions.

Read in:Topic 10.1
AS & A Level Economics

Borrowing

Receiving money now with a promise to repay it, often with interest.

Example: A student borrows money to buy a laptop.

Economics

Borrowing

Receiving money now with a promise to repay it, often with interest.

Example: A student borrows money to buy a laptop.

Read in:Chapter 17
AS & A Level Business

Boston Matrix

A tool that compares products by market growth and relative market share.

Example: A growing product with high share is classified as a star.

Read in:Topic 3.3
Edexcel Business

Boston matrix

A tool that compares products by market growth and relative market share.

Example: A growing product with high share is classified as a star.

Read in:Chapter 36
AS & A Level Business

Bottleneck

A stage that limits the speed or output of the whole process.

Example: One slow packaging machine holds up production.

Read in:Topic 4.3
Computer Science

Boundary condition

A condition at the edge of a valid range or loop.

Example: Testing age 18 checks a boundary condition.

Read in:Topic 7.8
Mathematics

Boundary line

A line that separates satisfying and non-satisfying regions of an inequality.

Example: The line y = 3 is the boundary for y ≥ 3.

Read in:Chapter 24
Computer Science

Boundary test data

Values at or very close to the permitted limits.

Example: For ages 5–18, test 5, 18, 4 and 19.

Read in:Topic 7.6
Mathematics

Bracket

A symbol grouping part of a calculation so it is done together.

Example: (2 + 3) × 4 = 20.

Read in:Chapter 6
Business Studies

Brand

A name, symbol or design that helps customers recognise a business or product.

Example: A familiar sportswear logo is part of a brand.

Edexcel Business

Brand

A name, symbol or design that helps customers recognise a business or product.

Example: A familiar sportswear logo is part of a brand.

Edexcel Business

Brand awareness

How familiar customers are with a brand.

Example: Many shoppers recognise a company from its logo.

Read in:Chapter 39
Business Studies

Brand image

The ideas and feelings customers connect with a brand.

Example: Customers may see a brand as reliable and good value.

AS & A Level Business

Brand loyalty

Customers' tendency to keep buying the same brand.

Example: A customer repeatedly chooses the same sportswear brand.

Read in:Topic 8.1
Business Studies

Brand loyalty

When customers repeatedly buy a particular brand.

Example: Someone always chooses the same shampoo brand.

Read in:Chapter 12
Edexcel Business

Brand loyalty

When customers repeatedly buy a particular brand.

Example: Someone always chooses the same shampoo brand.

Read in:Chapter 34
Edexcel Business

Branding

Creating a recognisable identity for a product or business.

Example: A business uses a consistent name, logo and packaging.

Read in:Chapter 39
Business Studies

Break-even

The level of sales where total revenue equals total costs, so there is no profit or loss.

Example: A shop breaks even when sales exactly cover all its costs.

Read in:Chapter 19
Edexcel Business

Break-even chart

A graph showing total costs and total revenue at different output levels.

Example: The point where the cost and revenue lines cross is break-even.

Read in:Chapter 28
Edexcel Business

Break-even output

The number of units a business must sell to cover all its costs.

Example: A business breaks even after selling 500 units.

AS & A Level Business

Break-even point

The output level where total revenue equals total costs.

Example: At 500 units, a factory makes neither profit nor loss.

Read in:Topic 5.4
Economics

Break-even point

The output or sales level where total revenue equals total cost.

Example: At 200 units sold, a business covers all costs but makes no profit.

Read in:Chapter 22
Edexcel Business

Break-even point

The output level where total revenue equals total costs.

Example: At 500 units, a factory makes neither profit nor loss.

Read in:Chapter 28
ICT

Bridge

A device that connects and filters traffic between network sections.

Example: A bridge links two sections of a LAN.

Read in:Chapter 4
AS & A Level Economics

Broad money

A wider measure including narrow money plus less liquid bank deposits.

Example: Some savings deposits are included in broad money.

Read in:Chapter 27
Edexcel Business

Broker

An intermediary who brings buyers and sellers together.

Example: An insurance broker compares offers for a customer.

Read in:Chapter 38
Computer Science

Brute force attack

Trying many possible passwords or keys until one works.

Example: A program tests thousands of passwords.

Read in:Topic 5.3
Computer Science

Bubble sort

A sorting algorithm that repeatedly compares and swaps neighbouring items.

Example: A bubble sort moves larger numbers towards the end of a list.

Read in:Topic 7.4
AS & A Level Business

Budget

A financial plan of expected income or spending for a period.

Example: A marketing team plans to spend $5,000 next month.

Read in:Topic 1.4
Edexcel Business

Budget

A financial plan of expected income or spending for a period.

Example: A marketing team plans to spend $5,000 next month.

AS & A Level Economics

Budget deficit

When government spending is greater than government revenue.

Example: The state collects $90 billion and spends $100 billion.

Read in:Chapter 11
Economics

Budget deficit

When government spending is greater than government revenue.

Example: The state collects $90 billion and spends $100 billion.

Read in:Chapter 26
AS & A Level Economics

Budget line

A line showing combinations of two goods a consumer can afford with a fixed income.

Example: A £20 budget permits either four £5 meals or two £10 cinema tickets.

Read in:Chapter 14
AS & A Level Economics

Budget surplus

When government revenue is greater than government spending.

Example: The state collects $110 billion and spends $100 billion.

Read in:Chapter 11
Economics

Budget surplus

When government revenue is greater than government spending.

Example: The state collects $110 billion and spends $100 billion.

Read in:Chapter 26
AS & A Level Business

Budget variance

The difference between a budgeted amount and the actual result.

Example: Budgeted spending of $5,000 and actual spending of $5,500 gives a $500 variance.

Read in:Topic 5.5
AS & A Level Business

Budgetary control

Using budgets to monitor spending and take corrective action.

Example: Managers compare monthly expenses with planned amounts.

Read in:Topic 5.5
Computer Science

Buffer

A temporary storage area used while data moves between devices or processes.

Example: A printer buffer holds pages waiting to print.

Read in:Topic 4.1
AS & A Level Business

Buffer inventory

Extra inventory held to protect against unexpected demand or delayed deliveries.

Example: A shop keeps spare batteries in case sales suddenly rise.

Read in:Topic 4.2
Edexcel Business

Bureaucracy

Too many rules and layers of management that may slow decisions.

Example: A simple purchase needs approval from several departments.

Read in:Chapter 40
AS & A Level Business

Business activity

The work of making or providing goods and services to meet people's needs and wants.

Example: A bakery makes bread for local customers.

Read in:Topic 1.1
Edexcel Business

Business activity

The work of producing goods or providing services to meet customers' needs and wants.

Example: A bakery makes bread and sells it to customers.

Edexcel Business

Business communication

Sharing information between people inside or outside a business.

Example: A manager emails staff about changes to opening times.

Read in:Chapter 16
AS & A Level Business

Business cycle

Changes in economic activity between stronger growth and weaker periods.

Example: A downturn is followed later by economic recovery.

Read in:Topic 6.1
AS & A Level Economics

Business cycle

The repeated expansion and contraction of economic activity over time.

Example: A boom is followed by a slowdown and possibly a recession.

Read in:Chapter 25
Business Studies

Business cycle

The pattern of rises and falls in economic activity over time.

Example: An economy experiences growth, slowdown and recovery.

Read in:Chapter 27
Accounting

Business entity principle

The rule that the owner's personal transactions are kept separate from the business's accounts.

Example: A shop owner's personal food bill is not a business expense.

Read in:Chapter 26
Edexcel Business

Business failure

When a business can no longer continue operating successfully.

Example: A retailer closes after prolonged losses and unpaid bills.

Read in:Chapter 15
AS & A Level Business

Business finance

Money a business uses to start, operate and develop.

Example: A new restaurant needs finance for equipment and wages.

Read in:Topic 5.1
AS & A Level Business

Business location

The place where a business carries out its activities.

Example: A retailer chooses a busy high street for its shop.

Read in:Topic 9.1
Edexcel Business

Business location

The place where a business carries out its activities.

Example: A retailer chooses a busy high street for its shop.

Read in:Chapter 8
AS & A Level Business

Business objective

A result a business wants to achieve.

Example: A business aims to increase sales by 10% this year.

Read in:Topic 1.4
Business Studies

Business objective

A target a business wants to achieve.

Example: A retailer aims to increase sales by 10% this year.

Read in:Chapter 5
Edexcel Business

Business objectives

Specific goals a business is trying to achieve.

Example: A new shop aims to survive its first year and build sales.

Edexcel Business

Business ownership

The legal arrangement that determines who owns and controls a business.

Example: A startup can operate as a sole trader or company.

Read in:Chapter 6
AS & A Level Business

Business plan

A document setting out a business idea, objectives, market, finance and expected performance.

Example: A start-up uses a business plan to apply for a loan.

Read in:Topic 1.1
Business Studies

Business plan

A document explaining a business idea, its goals and how it expects to succeed.

Example: A café owner forecasts sales and costs before opening.

Read in:Chapter 3
Edexcel Business

Business risk

The possibility that a business decision will lead to losses or other problems.

Example: A shop risks losing money when opening a second branch.

Read in:Chapter 3
Business Studies

Business size

A measure of how large a business is, such as its sales or number of employees.

Example: A shop with five workers is usually smaller than a chain with 500.

Read in:Chapter 3
AS & A Level Business

Business strategy

A long-term plan for achieving major business objectives.

Example: A company plans to enter two new markets over five years.

Read in:Topic 6.2
Edexcel Business

Business success

How well a business achieves its objectives.

Example: A business meets its profit target and keeps loyal customers.

Read in:Chapter 14
Edexcel Business

Business to business

Sales made by one business to another.

Example: A wholesaler sells ingredients to a restaurant.

Read in:Chapter 38
Edexcel Business

Business to consumer

Sales made by a business directly to individual customers.

Example: A clothing store sells a jacket to a shopper.

Read in:Chapter 38
AS & A Level Business

Business-to-business market

A market where organisations sell to other organisations.

Example: A packaging supplier sells boxes to supermarkets.

Read in:Topic 3.1
Computer Science

Byte

A group of eight bits.

Example: 01010101 uses one byte.

C Dictionary terms

Computer Science

Cache memory

Very fast memory close to or inside the CPU for frequently needed data.

Example: A CPU cache reduces time spent waiting for RAM.

Read in:Topic 3.1
AS & A Level Business

Calculated risk

A risk taken after weighing likely costs and benefits.

Example: A shop trials a new range before a full launch.

Read in:Topic 1.1
Mathematics

Calculator display

The screen that shows the value entered and the answer.

Example: A calculator may show 3.5E4 for 35,000.

Read in:Chapter 14
Accounting

Called-up capital

The part of the value of issued shares that shareholders have been asked to pay.

Example: A company calls up 80 cents on each $1 share.

Read in:Chapter 17
Mathematics

Cancel factors

Divide the numerator and denominator by the same non-zero factor.

Example: 6x/3 simplifies to 2x.

Read in:Chapter 21
AS & A Level Business

Capacity

The maximum output a business can produce using available resources.

Example: A factory can make up to 500 units per day.

Read in:Topic 4.3
Mathematics

Capacity

How much a container can hold, usually liquid.

Example: A jug may have capacity 1.5 litres.

Read in:Chapter 39
AS & A Level Business

Capacity utilisation

Actual output as a percentage of maximum possible output.

Example: Producing 400 out of a possible 500 units means 80% utilisation.

Read in:Topic 4.3
Accounting

Capital

The owner's investment or interest in the business.

Example: An owner puts $5,000 into a new shop as capital.

AS & A Level Economics

Capital

Man-made resources used to produce other goods and services.

Example: Factory machinery is capital.

Business Studies

Capital

Man-made resources, such as machinery and buildings, used to produce other goods and services.

Example: A factory buys a new machine to increase output.

Economics

Capital

Man-made resources used to produce other goods and services.

Example: Factory machinery is capital.

Edexcel Business

Capital

Man-made resources, such as machinery and buildings, used to produce other goods and services.

Example: A factory buys a new machine to increase output.

Read in:Chapter 44
AS & A Level Economics

Capital account

The balance-of-payments account recording capital transfers and some non-produced asset transactions.

Example: Debt forgiveness may appear as a capital transfer.

AS & A Level Economics

Capital accumulation

An increase in machinery, buildings and other productive capital.

Example: A business builds an additional factory to raise future output.

Read in:Chapter 8
Accounting

Capital employed

The long-term finance invested in the business, often capital plus non-current liabilities.

Example: Owner capital $12,000 + long-term loan $8,000 = $20,000.

Business Studies

Capital employed

Long-term money invested in a business, usually equity plus non-current liabilities.

Example: A business uses shareholder funds and a long-term loan to finance operations.

Edexcel Business

Capital employed

Long-term money invested in a business, usually equity plus non-current liabilities.

Example: A business uses shareholder funds and a long-term loan to finance operations.

Read in:Chapter 30
Accounting

Capital expenditure

Money spent buying or improving a non-current asset.

Example: Buying a new delivery van is capital expenditure.

Read in:Chapter 10
AS & A Level Business

Capital expenditure

Spending on long-term assets such as buildings or machinery.

Example: Buying a delivery van is capital expenditure.

Read in:Topic 5.1
Business Studies

Capital expenditure

Money spent buying long-term assets for a business.

Example: Buying a delivery van is capital expenditure.

Read in:Chapter 22
Edexcel Business

Capital expenditure

Money spent buying long-term assets for a business.

Example: Buying a delivery van is capital expenditure.

Read in:Chapter 43
AS & A Level Economics

Capital inflow

Money entering an economy through investment, lending or other asset purchases.

Example: Foreign investors buying domestic government bonds create an inflow.

Read in:Chapter 29
AS & A Level Business

Capital investment

Spending on long-term assets intended to generate future benefits.

Example: A manufacturer buys an automated production line.

Read in:Topic 10.3
Edexcel Business

Capital productivity

Output produced per unit of capital input, such as equipment or machinery.

Example: A factory measures how much output each machine produces.

Read in:Chapter 41
Accounting

Capital receipt

Money received from selling an asset or introducing capital, not from ordinary trading.

Example: Cash from selling an old machine is a capital receipt.

Read in:Chapter 10
Accounting

Capital structure

The mix of owners' funds and borrowed money used to finance a business.

Example: A business may use 60% owners' funds and 40% loans.

Read in:Chapter 23
AS & A Level Business

Capital structure

The mix of debt and equity used to finance a business.

Example: A firm funds expansion with shares and a bank loan.

Read in:Topic 10.4
AS & A Level Business

Capital-intensive production

Production that relies more heavily on machinery and equipment than workers.

Example: A car factory uses industrial robots.

Read in:Topic 4.1
AS & A Level Economics

Capital-intensive production

Production using relatively more machinery than workers.

Example: An automated car factory uses capital-intensive methods.

Read in:Chapter 31
Business Studies

Capital-intensive production

Production that relies heavily on machinery and equipment.

Example: A car factory uses automated machines.

Read in:Chapter 18
Economics

Capital-intensive production

Production using relatively more machinery than workers.

Example: An automated car factory uses capital-intensive methods.

Read in:Chapter 21
Edexcel Business

Capital-intensive production

Production that relies heavily on machinery and equipment.

Example: A car factory uses automated machines.

Accounting

Capitalising expenditure

Recording eligible spending as an asset rather than an immediate expense.

Example: The cost of installing a new machine is added to the asset's cost.

Read in:Chapter 10
ICT

Carbon copy

An email field that sends a visible copy of a message to other recipients.

Example: A teacher uses Cc to include another colleague.

Read in:Chapter 10
AS & A Level Economics

Carbon emissions

Release of carbon dioxide and other carbon-based gases into the atmosphere.

Example: Burning fossil fuels for electricity produces carbon emissions.

Read in:Chapter 25
Edexcel Business

Carbon footprint

The greenhouse gases produced directly and indirectly by an activity.

Example: A delivery company measures emissions from its vans.

Read in:Chapter 13
ICT

Card cloning

Copying card information to make a fraudulent duplicate.

Example: A criminal copies details from a payment card.

Read in:Chapter 8
Accounting

Carriage inwards

Transport costs paid to bring purchased goods into the business.

Example: A shop pays $20 to deliver stock from a supplier.

Read in:Chapter 15
Accounting

Carriage outwards

Delivery costs paid to send sold goods to customers.

Example: A retailer pays $15 to deliver an order.

Read in:Chapter 15
AS & A Level Economics

Cartel

A group of firms acting together to control prices or output.

Example: Oil producers may coordinate production levels.

Read in:Chapter 19
Accounting

Cash book

A book that records cash and bank receipts and payments.

Example: A payment by bank transfer is entered in the cash book.

Read in:Chapter 5
Edexcel Business

Cash cow

A Boston matrix product with high market share in a slow-growing market.

Example: A long-established drink generates steady cash for its company.

Read in:Chapter 36
Accounting

Cash discount

A reduction given for paying a credit account promptly.

Example: A customer pays $98 instead of $100 within the discount period.

AS & A Level Business

Cash flow

The movement of money into and out of a business.

Example: Customer payments are cash inflows and wages are outflows.

Read in:Topic 5.1
Business Studies

Cash flow

Money coming into and going out of a business over time.

Example: A shop receives customer payments and pays suppliers.

Edexcel Business

Cash flow

Money coming into and going out of a business over time.

Example: A shop receives customer payments and pays suppliers.

Business Studies

Cash flow forecast

An estimate of future money coming in and going out.

Example: A café predicts cash receipts and payments for next month.

Read in:Chapter 23
Edexcel Business

Cash flow forecast

An estimate of future money coming in and going out.

Example: A café predicts cash receipts and payments for next month.

Read in:Chapter 26
Edexcel Business

Cash flow forecasting

Estimating when cash will enter and leave a business in future periods.

Example: A shop prepares a monthly forecast for the next six months.

Read in:Chapter 24
AS & A Level Business

Cash inflow

Money received by a business.

Example: A customer pays $2,000 into the business account.

Read in:Topic 5.3
Business Studies

Cash inflow

Money received by a business.

Example: A customer pays $100 for an order.

Read in:Chapter 23
Edexcel Business

Cash inflow

Money received by a business.

Example: A customer pays $100 for an order.

Read in:Chapter 26
AS & A Level Business

Cash outflow

Money paid out by a business.

Example: A company pays $700 in wages.

Read in:Topic 5.3
Business Studies

Cash outflow

Money paid out by a business.

Example: A company pays $400 rent.

Read in:Chapter 23
Edexcel Business

Cash outflow

Money paid out by a business.

Example: A company pays $400 rent.

Read in:Chapter 26
Edexcel Business

Cash shortage

A period when a business lacks enough cash to pay its bills on time.

Example: A firm cannot pay wages until customers settle invoices.

Read in:Chapter 26
AS & A Level Business

Cash shortfall

When a business has less cash than it needs to meet planned payments.

Example: A shop expects a $3,000 cash shortage next month.

Read in:Topic 5.3
AS & A Level Business

Cash-flow forecast

An estimate of money expected to enter and leave a business in future periods.

Example: A café predicts its cash balance for the next six months.

Read in:Topic 5.3
AS & A Level Business

Cash-flow management

Actions taken to ensure enough money is available when payments are due.

Example: A business negotiates later supplier payment dates.

Read in:Topic 5.3
AS & A Level Economics

Catch-up hypothesis

The idea that poorer countries can grow faster by adopting existing technologies and methods.

Example: A developing manufacturer gains productivity from established machinery.

Read in:Chapter 30
Mathematics

Categorical data

Information placed into groups or labels rather than measured on a number scale.

Example: Favourite colours are categorical data.

Read in:Chapter 45
ICT

Cathode ray tube

An older display technology that uses electron beams to create an image.

Example: Older bulky computer monitors used CRT.

Read in:Chapter 2
AS & A Level Economics

Central bank

The institution that manages a country's monetary system and often sets key interest rates.

Example: The central bank raises rates to slow borrowing.

Economics

Central bank

The institution that manages a country's monetary system and often sets key interest rates.

Example: The central bank raises rates to slow borrowing.

Read in:Chapter 16
Computer Science

Central processing unit

The part of a computer that fetches, decodes and carries out instructions.

Example: The CPU executes a program's instructions.

Read in:Topic 3.1
ICT

Central processing unit

The part of a computer that carries out instructions and processes data.

Example: The CPU performs calculations when a program runs.

Read in:Chapter 1
AS & A Level Business

Centralisation

Keeping important decisions mainly at the top of an organisation.

Example: Head office sets prices for every branch.

Read in:Topic 7.1
Edexcel Business

Centralisation

Keeping important decisions mainly at the top of an organisation.

Example: Head office sets prices for every branch.

Read in:Chapter 23
Mathematics

Centre of rotation

The fixed point around which a shape turns.

Example: A turn of 180° around (0,0) uses the origin as its centre.

Read in:Chapter 42
AS & A Level Economics

Ceteris paribus

An assumption that other factors stay unchanged while one factor is studied.

Example: To study the effect of price on demand, assume income does not change.

AS & A Level Business

Chain of command

The route through which instructions and authority pass in an organisation.

Example: An assistant reports to a supervisor, who reports to a manager.

Read in:Topic 7.1
Business Studies

Chain of command

The line of authority from senior managers down through a business.

Example: A worker reports to a supervisor, who reports to a manager.

Edexcel Business

Chain of command

The line of authority from senior managers down through a business.

Example: A worker reports to a supervisor, who reports to a manager.

AS & A Level Economics

Change in demand

When the whole demand curve shifts because something other than price changes.

Example: More people want umbrellas during rainy weather.

Read in:Chapter 3
Economics

Change in demand

When the whole demand curve shifts because something other than price changes.

Example: More people want umbrellas during rainy weather.

Economics

Change in supply

When the entire supply curve shifts because a factor other than price changes.

Example: Cheaper materials allow firms to supply more.

Read in:Chapter 8
Computer Science

Character

A single letter, digit or symbol.

Example: 'A' is a character.

Read in:Topic 8.1
Computer Science

Character encoding

Rules for storing characters as binary values.

Example: UTF-8 is an encoding for Unicode text.

Read in:Topic 1.2
Computer Science

Character set

A list of characters and the numbers used to represent them.

Example: A character set assigns a number to the letter A.

Read in:Topic 1.2
Computer Science

Check digit

An extra digit calculated from other digits to help spot typing mistakes.

Example: A barcode may contain a check digit.

Read in:Topic 2.2
ICT

Check digit

An extra digit calculated from other digits to detect certain entry errors.

Example: A barcode includes a check digit.

Read in:Chapter 7
Computer Science

Checksum

A calculated value sent with data so the receiver can check it.

Example: A downloaded file can be checked against its checksum.

Read in:Topic 2.2
Accounting

Cheque

A written instruction asking a bank to pay money from an account.

Example: A company issues a cheque to pay a supplier.

Read in:Chapter 4
Accounting

Cheque counterfoil

The part of a cheque book kept as a record of a cheque issued.

Example: The counterfoil notes the cheque's amount and payee.

Read in:Chapter 4
ICT

Chip and PIN reader

A payment device that reads a card chip and checks a PIN.

Example: A customer enters a PIN at a card terminal.

Read in:Chapter 2
AS & A Level Economics

Choice

Selecting one option when you cannot have everything.

Example: A family chooses a new fridge instead of a holiday.

Economics

Choice

Selecting one option when you cannot have everything.

Example: A family chooses a new fridge instead of a holiday.

Mathematics

Chord

A straight line joining two points on a circle.

Example: A diameter is the longest chord.

Read in:Chapter 38
Computer Science

Ciphertext

Encrypted information that cannot normally be read without a key.

Example: A string of scrambled symbols may be ciphertext.

Read in:Topic 2.3
AS & A Level Economics

Circular flow of income

The movement of income, spending and output between households, firms and other sectors.

Example: Firms pay wages and households use wages to buy goods.

Mathematics

Circumference

The distance around the edge of a circle.

Example: For diameter 10 cm, circumference is 10π cm.

Read in:Chapter 40
AS & A Level Economics

Claimant count

A measure of unemployment based on people claiming certain jobless benefits.

Example: The number receiving eligible unemployment benefits is counted.

Read in:Chapter 9
Economics

Claimant count

A measure of unemployment based on people claiming certain jobless benefits.

Example: The number receiving eligible unemployment benefits is counted.

Read in:Chapter 30
Edexcel Business

Clarity

How easy something is to understand.

Example: Clear instructions help staff complete a task correctly.

Read in:Chapter 17
Computer Science

Clock speed

The number of processor clock cycles each second.

Example: A 3 GHz CPU has about three billion clock cycles per second.

Read in:Topic 3.1
Computer Science

Close file

Finishing work with a file and releasing it.

Example: A program closes a file after saving results.

Read in:Topic 8.3
AS & A Level Business

Closing balance

Cash remaining at the end of a period.

Example: An opening balance of $1,500 plus net inflow of $500 gives $2,000.

Read in:Topic 5.3
Business Studies

Closing balance

The money left at the end of a period after receipts and payments.

Example: A shop finishes the month with $2,500 in its bank account.

Read in:Chapter 23
Edexcel Business

Closing balance

The money left at the end of a period after receipts and payments.

Example: A shop finishes the month with $2,500 in its bank account.

Read in:Chapter 26
Accounting

Closing capital

The owner's capital at the end of the accounting period.

Example: This December the business has $9,500 owner capital.

Read in:Chapter 20
Accounting

Closing inventory

Goods a business still has available for sale at the end of a period.

Example: A count shows $900 of unsold stock on 31 December.

ICT

Cloud storage

Saving files on remote servers accessed over a network.

Example: A student opens a saved document from a cloud account.

Read in:Chapter 4
Accounting

Club or society

An organisation formed for a shared activity rather than mainly to earn profits for owners.

Example: A local football club collects membership fees.

Read in:Chapter 18
ICT

CMOS

Technology commonly associated with a small memory storing firmware settings.

Example: A computer can retain its date and time settings.

Read in:Chapter 1
Mathematics

Co-interior angles

Angles on the same side inside parallel lines; they add to 180°.

Example: If one is 110°, the other is 70°.

Read in:Chapter 37
Edexcel Business

Coaching

Practical help focused on improving a particular skill or performance.

Example: A manager coaches a salesperson on customer conversations.

Read in:Chapter 20
AS & A Level Economics

Coase theorem

The idea that clear property rights and low bargaining costs can sometimes let people negotiate solutions to externalities.

Example: Neighbours negotiate payment to limit noise when bargaining is practical.

Read in:Chapter 16
Mathematics

Coefficient

The number multiplying a variable.

Example: In 7x, the coefficient of x is 7.

Read in:Chapter 19
Economics

Collective bargaining

Negotiations between workers' representatives and employers over pay and conditions.

Example: A union negotiates a pay rise for its members.

AS & A Level Economics

Collusion

When firms coordinate instead of competing independently, often to raise prices.

Example: Several producers secretly agree to restrict output.

Computer Science

Colour depth

The number of bits used to store the colour of one pixel.

Example: An image with 8-bit colour depth can represent 256 colour values.

Read in:Topic 1.2
Mathematics

Column vector

A vector written with its components one above the other.

Example: A column vector with 3 over −1 means right 3, down 1.

Read in:Chapter 43
ICT

Command-line interface

A way to control a computer by typing commands.

Example: A technician types a command to list files.

Read in:Chapter 1
Economics

Commercial bank

A bank that accepts deposits and lends money to customers.

Example: A bank provides a mortgage for a family.

Read in:Chapter 16
Business Studies

Commission

Pay linked to the value or number of sales made.

Example: An agent earns 5% of every sale.

Read in:Chapter 6
Edexcel Business

Commission

Pay linked to the value or number of sales made.

Example: An agent earns 5% of every sale.

Mathematics

Common denominator

A denominator that allows fractions to be combined.

Example: For 1/2 + 1/3, use the common denominator 6.

Read in:Chapter 21
Mathematics

Common difference

The constant amount added between consecutive terms of an arithmetic sequence.

Example: In 4, 9, 14, the common difference is 5.

Read in:Chapter 25
Mathematics

Common factor

A number or expression that divides every term exactly.

Example: 4 is a common factor of 8 and 12.

Read in:Chapter 20
AS & A Level Economics

Common market

An arrangement allowing free trade plus freer movement of labour and capital among members.

Example: Workers can take jobs in other member countries.

Read in:Chapter 32
Business Studies

Communication

Sharing information so that someone else understands a message.

Example: A manager tells staff about a new opening time.

AS & A Level Business

Communication barrier

Anything that prevents a message being understood correctly.

Example: Technical jargon confuses a new employee.

Read in:Topic 7.2
Business Studies

Communication barrier

Anything that prevents a message from being understood correctly.

Example: Loud noise makes instructions difficult to hear.

Read in:Chapter 9
Edexcel Business

Communication barriers

Problems that prevent a message from being understood correctly.

Example: Background noise makes instructions hard to hear.

Read in:Chapter 17
Edexcel Business

Communication breakdown

A failure to send, receive or understand important information.

Example: A delivery is missed because the warehouse never receives the order.

Read in:Chapter 17
Edexcel Business

Communication channel

The route or method used to pass information.

Example: A company uses its intranet to publish announcements.

Read in:Chapter 16
ICT

Compact disc

An optical disc often used for music or smaller files.

Example: A CD can hold a collection of songs.

Read in:Chapter 3
Accounting

Comparability

Information being prepared so users can compare different periods and businesses meaningfully.

Example: Using the same method helps compare this year's profit with last year's.

Read in:Chapter 27
AS & A Level Economics

Comparative advantage

Producing a good at a lower opportunity cost than another producer.

Example: A country gives up fewer other products when making rice.

Economics

Comparative advantage

Producing a good at a lower opportunity cost than another producer.

Example: A country gives up fewer other products when making rice.

Read in:Chapter 36
AS & A Level Economics

Comparative cost

The opportunity cost of producing one good relative to another.

Example: A country specialises in what it sacrifices least to produce.

Read in:Chapter 12
Mathematics

Compare

To decide which quantity is greater, smaller or equal.

Example: Compare 0.6 and 0.45: 0.6 is larger.

Read in:Chapter 5
Accounting

Comparison limitation

A factor that makes comparisons less reliable or fair.

Example: Different stock valuation methods can distort a comparison.

Read in:Chapter 23
Mathematics

Compass

A drawing instrument used to make circles and arcs.

Example: Use a compass to construct a circle of radius 4 cm.

Read in:Chapter 33
Accounting

Compensating error

Two or more errors that cancel each other out in the trial balance.

Example: An extra $20 debit is matched by an extra $20 credit elsewhere.

AS & A Level Economics

Competition

Rivalry between sellers for customers.

Example: Two supermarkets cut prices to attract shoppers.

Economics

Competition

Rivalry between sellers for customers.

Example: Two supermarkets cut prices to attract shoppers.

Read in:Chapter 23
Edexcel Business

Competition

When businesses try to win customers from one another.

Example: Two cafés lower prices to attract more customers.

Edexcel Business

Competition policy

Government rules designed to prevent unfair restrictions on competition.

Example: Regulators may investigate firms that secretly agree on prices.

Read in:Chapter 12
Edexcel Business

Competition-based pricing

Setting prices with reference to what competing businesses charge.

Example: A café prices its coffee similarly to nearby cafés.

Read in:Chapter 37
Edexcel Business

Competitive advantage

Something that helps a business perform better than its rivals.

Example: Faster delivery gives an online shop a competitive advantage.

Business Studies

Competitive pricing

Setting a price in relation to competitors' prices.

Example: A café charges about the same as nearby cafés.

Read in:Chapter 13
AS & A Level Economics

Competitiveness

How well a producer can succeed against rivals on price, quality or other features.

Example: Better quality and lower costs make an exporter more competitive.

Economics

Competitiveness

How well a producer can succeed against rivals on price, quality or other features.

Example: Better quality and lower costs make an exporter more competitive.

Read in:Chapter 36
AS & A Level Business

Competitor analysis

Studying rival businesses to understand their strengths and likely actions.

Example: A store compares its prices and delivery options with nearby rivals.

Read in:Topic 8.2
Computer Science

Compiler

A translator that converts a whole program into machine code or another target form.

Example: A compiler can create an executable program.

Read in:Topic 4.2
Mathematics

Complement

The elements in the universal set that are not in a chosen set.

Example: If U={1,2,3}, the complement of {1} is {2,3}.

Economics

Complementary goods

Products often used together.

Example: Printers and ink cartridges are complementary goods.

Read in:Chapter 7
AS & A Level Economics

Composite demand

When the same product is demanded for several different uses.

Example: Wheat is demanded for both bread and animal feed.

Read in:Chapter 4
Mathematics

Composite function

A function made by applying one function and then another.

Example: If f(x)=x+1 and g(x)=2x, then f(g(3))=7.

Read in:Chapter 30
Mathematics

Compound growth

An increase calculated on the latest value rather than just the original.

Example: $100 growing by 10% becomes $110, then $121.

Read in:Chapter 17
Mathematics

Compound inequality

Two inequalities combined to describe a range.

Example: 2 < x ≤ 6 is a compound inequality.

Read in:Chapter 24
Mathematics

Compound interest

Interest calculated on the growing total, including earlier interest.

Example: 10% on $100 gives $110 after one year and $121 after two.

Read in:Chapter 13
ICT

Computer modelling

Using a computer-based model to explore how a real system may behave.

Example: A weather model predicts the path of a storm.

Read in:Chapter 6
ICT

Computer network

Two or more connected devices that exchange data and share resources.

Example: School computers share one printer.

Read in:Chapter 4
Edexcel Business

Computer numerical control

Using programmed instructions to control machinery automatically.

Example: A CNC machine cuts metal parts to exact dimensions.

Read in:Chapter 43
Computer Science

Computer system

Connected hardware and software working together for a purpose.

Example: A library's borrowing system tracks books and loans.

Read in:Topic 7.2
ICT

Computer virus

Malware that attaches to files or programs and can spread when they run.

Example: An infected file passes a virus to another computer.

Read in:Chapter 8
Computer Science

Computer vision

Technology that lets a computer analyse images or video.

Example: A system detects vehicles in road images.

Read in:Topic 6.3
ICT

Computer worm

Malware that copies itself and can spread through networks without attaching to a file.

Example: A worm spreads to unpatched computers.

Read in:Chapter 8
AS & A Level Business

Computer-aided design

Using computer software to create or improve product designs.

Example: Engineers design a part using CAD software.

Read in:Topic 9.3
Business Studies

Computer-aided design

Using computer software to create and change product designs.

Example: An engineer designs a bicycle frame on a computer.

Read in:Chapter 18
Edexcel Business

Computer-aided design

Using computer software to create and change product designs.

Example: An engineer designs a bicycle frame on a computer.

Read in:Chapter 43
ICT

Computer-aided learning

Using computer software to support teaching and learning.

Example: A student practises spelling in an interactive activity.

Read in:Chapter 6
AS & A Level Business

Computer-aided manufacturing

Using computers to control or support manufacturing processes.

Example: A computer directs machines cutting metal parts.

Read in:Topic 9.3
Business Studies

Computer-aided manufacturing

Using computers to control manufacturing machinery.

Example: A computer controls a machine that cuts metal parts.

Read in:Chapter 18
Edexcel Business

Computer-aided manufacturing

Using computers to control manufacturing machinery.

Example: A computer controls a machine that cuts metal parts.

Read in:Chapter 43
ICT

Computer-controlled system

A system that uses a computer to control a process or machine.

Example: A factory computer controls a production line.

Read in:Chapter 6
Edexcel Business

Computer-integrated manufacturing

Linking computer systems across design, planning and production to coordinate manufacturing.

Example: A factory connects its design software to automated machinery.

Read in:Chapter 43
AS & A Level Economics

Concentration ratio

The percentage of market sales accounted for by the largest firms.

Example: A four-firm ratio of 80% means the four largest firms hold 80% of sales.

Read in:Chapter 19
AS & A Level Economics

Concessional loan

A loan offered on more favourable terms than normal commercial borrowing.

Example: A development bank lends at a low interest rate with a long repayment period.

Read in:Chapter 31
Computer Science

Condition

A statement tested as true or false.

Example: The condition age > 12 controls whether a loop continues.

Read in:Topic 7.7
Computer Science

Conditional statement

Code that chooses actions using a condition.

Example: IF mark >= 50 THEN OUTPUT "Pass".

Read in:Topic 8.1
AS & A Level Economics

Conditionality

Policy requirements attached to financial assistance or loans.

Example: A loan may require reforms to tax collection or government spending.

Read in:Chapter 31
AS & A Level Economics

Confidence

How sure people feel about the future, affecting spending and borrowing.

Example: A worker with a secure job may feel confident about buying a car.

Economics

Confidence

How sure people feel about the future, affecting spending and borrowing.

Example: A worker with a secure job may feel confident about buying a car.

Read in:Chapter 17
AS & A Level Business

Conglomerate integration

Combining businesses operating in unrelated industries.

Example: A hotel company buys a software company.

Read in:Topic 1.3
Business Studies

Conglomerate integration

When businesses from different industries join together.

Example: A food producer buys a software company.

Read in:Chapter 3
AS & A Level Economics

Conglomerate merger

A merger between firms in unrelated industries.

Example: A food producer buys a software company.

Read in:Chapter 20
Mathematics

Congruent

Shapes that have exactly the same size and shape.

Example: Two triangles with matching sides and angles are congruent.

Read in:Chapter 35
Mathematics

Conjugate

One of two expressions that differ only in the sign between their terms.

Example: 3 + √2 and 3 − √2 are conjugates.

Read in:Chapter 18
Business Studies

Consequence

A result or effect of an action.

Example: A consequence of poor service is fewer repeat customers.

Accounting

Consistency principle

Using the same accounting methods from one period to the next unless there is a good reason to change.

Example: A business keeps using straight-line depreciation each year.

Read in:Chapter 26
Computer Science

Constant

A named value that should not change while a program runs.

Example: PI is stored as a constant.

Read in:Topic 8.1
Mathematics

Constant

A fixed value that does not change.

Example: The 5 in x + 5 is a constant.

Read in:Chapter 19
Mathematics

Constant of proportionality

The fixed number connecting two proportional quantities.

Example: For y = 3x, the constant is 3.

Read in:Chapter 26
Mathematics

Construction

An accurate geometric drawing made using specified tools and steps.

Example: Construct the perpendicular bisector of a line segment.

Read in:Chapter 33
Edexcel Business

Consumer awareness

How well customers know about products, rights and social or environmental issues.

Example: Shoppers check whether clothing is made ethically.

Read in:Chapter 13
Business Studies

Consumer boycott

When customers refuse to buy from a company to protest against its actions.

Example: Customers stop purchasing from a firm accused of polluting.

Read in:Chapter 28
Economics

Consumer confidence

How optimistic households feel about future jobs and income.

Example: People buy fewer expensive goods when confidence falls.

Read in:Chapter 17
AS & A Level Economics

Consumer equilibrium

The affordable combination of goods that gives a consumer the highest satisfaction.

Example: An indifference curve touches the budget line at the best affordable bundle.

Read in:Chapter 14
Edexcel Business

Consumer goods

Products bought by individuals for personal use.

Example: A family buys a television for their home.

Read in:Chapter 1
Edexcel Business

Consumer panel

A selected group of people asked to give regular feedback about products.

Example: A supermarket panel tests proposed packaging.

Read in:Chapter 33
AS & A Level Economics

Consumer price index

A measure of changes in the prices of a basket of goods and services bought by households.

Example: The CPI tracks the changing cost of everyday purchases.

Read in:Chapter 10
Economics

Consumer price index

A measure of changes in the prices of a basket of goods and services bought by households.

Example: The CPI tracks the changing cost of everyday purchases.

Read in:Chapter 31
Edexcel Business

Consumer profile

A description of a typical customer using characteristics such as age and income.

Example: A sports brand targets teenagers interested in fitness.

Read in:Chapter 35
Business Studies

Consumer protection

Laws and rules designed to prevent customers being treated unfairly.

Example: A shop must not falsely claim that a product is safe.

Edexcel Business

Consumer protection

Laws and rules designed to prevent customers being treated unfairly.

Example: A shop must not falsely claim that a product is safe.

Read in:Chapter 12
Economics

Consumer sovereignty

The idea that consumers influence what firms produce through their purchases.

Example: If shoppers stop buying a snack, firms may stop making it.

Read in:Chapter 13
Edexcel Business

Consumer spending

The amount households pay for goods and services.

Example: Spending on holidays falls when household budgets tighten.

AS & A Level Economics

Consumer surplus

The difference between what buyers are willing to pay and what they actually pay.

Example: A buyer willing to pay $30 for a ticket pays $20, gaining $10 surplus.

Economics

Consumer tastes

What consumers like or prefer.

Example: A fashion trend can increase demand for certain shoes.

Read in:Chapter 7
AS & A Level Economics

Consumption

Using goods and services to satisfy wants.

Example: Buying food for dinner is consumption.

Economics

Consumption

Using goods and services to satisfy wants.

Example: Buying food for dinner is consumption.

Read in:Chapter 17
AS & A Level Economics

Contestable market

A market where potential new competitors can constrain existing firms even if few firms operate.

Example: An incumbent keeps prices low because entrants can enter quickly.

Read in:Chapter 19
AS & A Level Business

Contingency leadership

The view that the most effective leadership style depends on the situation.

Example: A crisis needs more direct guidance than a creative workshop.

Read in:Topic 7.3
AS & A Level Business

Contingency planning

Preparing actions to take if an unexpected problem occurs.

Example: A company arranges backup suppliers before disruptions happen.

Read in:Topic 6.2
Mathematics

Continuous data

Measurements that can take any value within an interval.

Example: Mass measured in kilograms is continuous data.

Read in:Chapter 45
AS & A Level Business

Continuous improvement

Making frequent small changes to improve processes or products.

Example: A team removes one source of waste each month.

Read in:Topic 9.2
Edexcel Business

Continuous improvement

Making frequent small changes to improve processes or products.

Example: A team removes one source of waste each month.

Accounting

Contra entry

An entry that appears on both the cash and bank sides of the cash book.

Example: Depositing $200 cash into the bank is a contra entry.

Read in:Chapter 5
Accounting

Contra set-off

Reducing amounts owed between two businesses that are each other's customer and supplier.

Example: A $100 amount owed in each direction is cancelled.

Read in:Chapter 9
Business Studies

Contract of employment

An agreement describing an employee's job terms, such as pay and working hours.

Example: A worker signs a contract showing salary and holiday entitlement.

Read in:Chapter 8
Edexcel Business

Contracting out

Paying an outside provider to carry out work for an organisation.

Example: A council hires a private firm to collect waste.

Read in:Chapter 5
AS & A Level Economics

Contractionary fiscal policy

Tax increases or lower public spending used to reduce total demand.

Example: Government raises tax to reduce demand-led inflation.

Read in:Chapter 11
Economics

Contractionary fiscal policy

Tax increases or lower public spending used to reduce total demand.

Example: Government raises tax to reduce demand-led inflation.

Read in:Chapter 26
AS & A Level Economics

Contractionary monetary policy

A policy that makes borrowing harder or more expensive to reduce spending.

Example: The central bank raises interest rates to slow inflation.

Read in:Chapter 11
Economics

Contractionary monetary policy

A policy that makes borrowing harder or more expensive to reduce spending.

Example: The central bank raises interest rates to slow inflation.

Read in:Chapter 27
AS & A Level Business

Contribution

Sales revenue minus variable costs; it helps pay fixed costs and then profit.

Example: A product sold for $10 with $6 variable cost gives $4 contribution.

Read in:Topic 5.4
Business Studies

Contribution

Selling price per unit minus variable cost per unit.

Example: An item sells for $12 and has a $7 variable cost, giving $5 contribution.

Read in:Chapter 19
Edexcel Business

Contribution

Selling price per unit minus variable cost per unit.

Example: An item sells for $12 and has a $7 variable cost, giving $5 contribution.

AS & A Level Business

Contribution costing

A method that focuses on variable costs and contribution when making decisions.

Example: A firm evaluates a special order using its additional variable costs.

Read in:Topic 5.4
Accounting

Control account

A summary account that checks the total of individual balances in a ledger.

Example: A sales ledger control account checks total customer debts.

Read in:Chapter 9
Computer Science

Control system

A system that changes an output based on inputs or rules.

Example: A thermostat turns heating on when a room is cold.

Read in:Topic 6.1
ICT

Control system

A system that uses input data to change or operate a device.

Example: A thermostat controls a heater automatically.

Read in:Chapter 5
Computer Science

Control unit

The CPU component that manages the sequence of operations.

Example: The control unit directs data to the correct part of the CPU.

Read in:Topic 3.1
AS & A Level Business

Controlling

Checking results against targets and taking corrective action.

Example: A manager investigates why costs exceeded the budget.

Read in:Topic 2.3
AS & A Level Economics

Convergence

The process of poorer economies catching up with richer ones in income per person.

Example: A low-income country grows faster and narrows its income gap.

Read in:Chapter 30
Mathematics

Conversion graph

A graph used to change between measurement units or currencies.

Example: Read 5 miles against its distance in kilometres.

Read in:Chapter 27
Mathematics

Convert units

Express a measurement using a different unit without changing the amount.

Example: 3 km converts to 3,000 m.

Read in:Chapter 39
Computer Science

Cookie

A small piece of data a website asks a browser to store.

Example: A site remembers a selected language using a cookie.

Read in:Topic 5.1
Mathematics

Coordinate

A pair of values giving a point's position on a grid.

Example: (3, −2) is a coordinate.

Read in:Chapter 31
ICT

Copyright

Legal protection for original creative work, such as writing, software and images.

Example: A student must respect the copyright of a photograph.

Read in:Chapter 9
ICT

Copyright infringement

Using protected work without the required permission where an exception does not apply.

Example: Uploading a paid book without permission is infringement.

Read in:Chapter 9
Computer Science

Core

An individual processing unit within a CPU.

Example: A quad-core processor has four cores.

Read in:Topic 3.1
AS & A Level Business

Core competency

A distinctive skill or capability that helps a business compete.

Example: An engineering firm excels at designing reliable batteries.

Read in:Topic 6.2
AS & A Level Economics

Core inflation

Inflation measured after excluding some volatile items, commonly food and energy.

Example: A central bank looks at core inflation to assess underlying price pressure.

Read in:Chapter 10
AS & A Level Business

Core workforce

Permanent employees with skills considered essential to the business.

Example: A hospital employs permanent nurses as core workers.

Read in:Topic 7.4
AS & A Level Business

Corporate culture

The shared values and ways of working within an organisation.

Example: A company encourages open discussion and teamwork.

Read in:Topic 6.2
AS & A Level Business

Corporate social responsibility

When a business considers its impact on society and the environment.

Example: A retailer reduces packaging waste and improves worker conditions.

Edexcel Business

Corporate social responsibility

When a business considers its impact on society and the environment.

Example: A retailer reduces packaging waste and improves worker conditions.

Read in:Chapter 10
Accounting

Correction of errors

Finding and fixing mistakes in accounting records.

Example: A missing credit entry is posted to correct the trial balance.

Read in:Chapter 7
Mathematics

Correlation

A relationship in which two quantities tend to change together.

Example: As study time rises, test scores may show positive correlation.

Read in:Chapter 46
Mathematics

Corresponding angles

Angles in matching positions where a transversal crosses lines; they are equal for parallel lines.

Example: Two corresponding angles can both be 65°.

Read in:Chapter 37
Mathematics

Corresponding sides

Sides in two shapes that match the same positions.

Example: The longest sides match in similar triangles.

Read in:Chapter 35
Mathematics

Cosine

A trigonometric ratio: adjacent side divided by hypotenuse in a right triangle.

Example: If adjacent = 4 and hypotenuse = 5, cosine = 4/5.

Read in:Chapter 41
AS & A Level Business

Cost centre

A department or activity whose costs are tracked separately.

Example: The packing department is measured as a cost centre.

Read in:Topic 5.5
Edexcel Business

Cost control

Keeping expenses within planned limits without harming essential operations.

Example: A restaurant reduces food waste to save money.

Read in:Chapter 15
Edexcel Business

Cost curve

A graph showing how business costs change as output changes.

Example: A total-cost curve rises as more units are produced.

Read in:Chapter 27
AS & A Level Economics

Cost efficiency

Producing a given output at the lowest possible monetary cost.

Example: A firm chooses a less expensive input combination for the same output.

Read in:Chapter 15
AS & A Level Business

Cost leadership

Trying to become a lower-cost producer than competitors.

Example: A chain reduces unit costs using efficient distribution.

Read in:Topic 8.2
Accounting

Cost of inventory

The amount spent to buy or make goods held as inventory.

Example: The purchase price and carriage inwards can form inventory cost.

Read in:Chapter 14
AS & A Level Business

Cost of poor quality

Losses caused by defects, complaints, returns or rework.

Example: A manufacturer spends $4,000 replacing faulty parts.

Read in:Topic 9.2
Accounting

Cost of production

The total manufacturing cost of finished goods completed during a period.

Example: Prime cost plus overheads adjusted for work in progress gives production cost.

Read in:Chapter 19
Accounting

Cost of raw materials consumed

The cost of raw materials actually used in production during the period.

Example: Opening materials $100 + purchases $600 − closing $150 = $550.

Read in:Chapter 19
Accounting

Cost of sales

The cost of goods sold during the accounting period.

Example: Opening stock $100 + purchases $500 − closing stock $150 = $450.

Business Studies

Cost of sales

The direct cost of goods sold during a period.

Example: A retailer pays $60 for goods it later sells for $100.

Read in:Chapter 24
Edexcel Business

Cost of sales

The direct cost of goods sold during a period.

Example: A retailer pays $60 for goods it later sells for $100.

Read in:Chapter 29
Edexcel Business

Cost per unit

The amount it costs to produce one unit of output.

Example: £1,000 of total cost for 100 items means £10 per item.

Read in:Chapter 27
AS & A Level Business

Cost-plus pricing

Adding a percentage or amount to unit cost to set a price.

Example: A $20 item with a 25% mark-up is priced at $25.

Read in:Topic 3.3
Business Studies

Cost-plus pricing

Setting a selling price by adding a mark-up to the cost.

Example: A product costing $10 receives a 30% mark-up, making its price $13.

Read in:Chapter 13
Edexcel Business

Cost-plus pricing

Setting a selling price by adding a mark-up to the cost.

Example: A product costing $10 receives a 30% mark-up, making its price $13.

Read in:Chapter 37
AS & A Level Business

Cost-push inflation

Inflation caused by rising production costs.

Example: Higher energy prices force firms to increase prices.

Read in:Topic 6.1
AS & A Level Economics

Cost-push inflation

Inflation caused by rising production costs.

Example: Higher energy prices make many products more expensive.

Read in:Chapter 10
Economics

Cost-push inflation

Inflation caused by rising production costs.

Example: Higher energy prices make many products more expensive.

Read in:Chapter 31
Computer Science

Counter variable

A variable that tracks how many items or events have occurred.

Example: count ← count + 1 increases the number recorded.

Read in:Topic 7.4
Computer Science

Counting

Keeping track of how many times something happens.

Example: A program counts how many students passed.

Read in:Topic 7.4
Accounting

Credit

An entry on the right side of a T-account.

Example: A cash sale credits the sales account.

Read in:Chapter 3
AS & A Level Economics

Credit

Money or purchasing power provided now with repayment later.

Example: A bank gives a customer credit to buy a car.

Read in:Chapter 27
Economics

Credit

Money or purchasing power provided now with repayment later.

Example: A bank gives a customer credit to buy a car.

Read in:Chapter 16
Accounting

Credit balance

An account balance with more credit entries than debit entries.

Example: Sales revenue normally has a credit balance.

Read in:Chapter 6
Economics

Credit card

A payment card that allows a customer to borrow money up to a limit.

Example: A customer buys groceries on credit and pays the bill later.

Read in:Chapter 17
Edexcel Business

Credit card

A payment card that allows a customer to borrow money up to a limit.

Example: A customer buys groceries on credit and pays the bill later.

Read in:Chapter 25
AS & A Level Business

Credit control

Procedures used to encourage customers to pay on time.

Example: A firm sends reminders for overdue invoices.

Read in:Topic 5.3
Edexcel Business

Credit control

Procedures used to encourage customers to pay on time.

Example: A firm sends reminders for overdue invoices.

Read in:Chapter 24
AS & A Level Economics

Credit creation

Banks adding to bank deposits when they make new loans.

Example: A bank loan can increase the amount of deposit money.

Read in:Chapter 27
Economics

Credit creation

Banks adding to bank deposits when they make new loans.

Example: A bank loan can increase the amount of deposit money.

Read in:Chapter 27
Accounting

Credit note

A document that reduces the amount a customer owes, often for returned goods.

Example: A seller issues a $40 credit note for a damaged item.

Read in:Chapter 4
Accounting

Credit purchases

Purchases where a business receives goods now but pays later.

Example: The shop buys $250 of stock on credit.

Read in:Chapter 9
Accounting

Credit sales

Sales where customers receive goods now but pay later.

Example: A customer buys $100 of goods on 30-day credit.

Read in:Chapter 9
Accounting

Creditworthiness

How likely a person or business is to repay money it owes.

Example: A supplier reviews accounts to judge a customer's creditworthiness.

Read in:Chapter 24
AS & A Level Business

Crisis management

Responding quickly to a serious event threatening the organisation.

Example: A food producer manages an urgent product recall.

Read in:Topic 6.2
AS & A Level Economics

Cross elasticity of demand

How responsive demand for one good is to a price change in another good.

Example: A rise in coffee prices increases demand for tea, giving positive XED.

Read in:Chapter 3
Mathematics

Cross-section

The flat shape seen when a solid is cut straight through.

Example: A cut across a cylinder parallel to its ends shows a circle.

Read in:Chapter 40
AS & A Level Business

Crowdfunding

Raising small amounts of finance from many people, often through an online platform.

Example: Supporters fund the launch of a new product.

Read in:Topic 5.2
Edexcel Business

Crowdfunding

Raising small amounts of finance from many people, often through an online platform.

Example: Supporters fund the launch of a new product.

Read in:Chapter 25
AS & A Level Economics

Crowding out

When extra government borrowing or spending reduces private-sector investment or spending.

Example: Higher government borrowing raises interest rates and discourages private investment.

Read in:Chapter 28
Computer Science

Cryptocurrency

A digital asset that uses cryptography and usually a distributed ledger.

Example: Bitcoin is a cryptocurrency.

Read in:Topic 5.2
Computer Science

Cryptography

Methods used to protect information using mathematical techniques.

Example: Encryption is one application of cryptography.

Read in:Topic 5.2
Mathematics

Cube number

A number made by multiplying a whole number by itself three times.

Example: 27 is a cube number because 3 × 3 × 3 = 27.

Read in:Chapter 3
Mathematics

Cube root

A number that gives the starting number when cubed.

Example: The cube root of 64 is 4.

Read in:Chapter 3
Mathematics

Cubic curve

A graph of a polynomial with highest power 3.

Example: y = x³ is a cubic curve.

Read in:Chapter 29
Mathematics

Cubic graph

A graph of a function whose highest power is 3.

Example: The graph of y = x³ passes through the origin.

Read in:Chapter 28
Mathematics

Cumulative frequency

The running total of frequencies up to a given value.

Example: For frequencies 3, 5 and 2, totals are 3, 8 and 10.

Read in:Chapter 46
Edexcel Business

Currency

The type of money used in a country.

Example: The Japanese yen is a currency.

Read in:Chapter 11
Mathematics

Currency

The type of money used in a country.

Example: The Japanese yen is a currency.

Read in:Chapter 16
AS & A Level Economics

Currency appreciation

When a currency rises in value compared with another currency.

Example: One dollar buys more euros than before.

Read in:Chapter 31
Economics

Currency appreciation

When a currency rises in value compared with another currency.

Example: One dollar buys more euros than before.

Read in:Chapter 38
Edexcel Business

Currency conversion

Changing an amount of money from one currency into another.

Example: A traveller changes pounds into US dollars using an exchange rate.

Read in:Chapter 11
AS & A Level Economics

Currency demand

Demand for a currency by people who need it to buy assets or goods priced in that currency.

Example: Tourists buy Japanese yen to spend in Japan.

Read in:Chapter 13
Economics

Currency depreciation

When a currency falls in value compared with another currency.

Example: One dollar buys fewer euros than before.

Read in:Chapter 38
Edexcel Business

Currency fluctuation

A rise or fall in the value of a currency over time.

Example: The pound strengthens against the dollar one week and weakens the next.

Read in:Chapter 11
AS & A Level Economics

Currency supply

The amount of a currency offered on the foreign exchange market.

Example: Importers sell domestic currency to buy dollars for overseas purchases.

Read in:Chapter 13
Accounting

Current account

An account recording a partner's share of profits, drawings and other adjustments.

Example: A partner's salary allowance increases their current account.

Read in:Chapter 16
AS & A Level Economics

Current account

A part of the balance of payments recording trade in goods and services, primary income and secondary income.

Example: A country's goods exports appear on its current account.

Economics

Current account

A part of the balance of payments recording trade in goods and services, primary income and secondary income.

Example: A country's goods exports appear on its current account.

Read in:Chapter 39
AS & A Level Economics

Current account deficit

When current-account outflows are greater than inflows.

Example: The country pays more abroad than it receives on its current account.

Read in:Chapter 13
Economics

Current account deficit

When current-account outflows are greater than inflows.

Example: The country pays more abroad than it receives on its current account.

Read in:Chapter 39
Economics

Current account surplus

When current-account inflows are greater than outflows.

Example: A country receives more on its current account than it pays.

Read in:Chapter 39
Accounting

Current asset

An asset expected to become cash or be used within about a year.

Example: Inventory and trade receivables are current assets.

Read in:Chapter 2
AS & A Level Business

Current asset

An asset expected to become cash or be used within the normal operating cycle or a year.

Example: Cash and inventory are current assets.

Read in:Topic 10.1
Business Studies

Current assets

Assets expected to turn into cash or be used within about a year.

Example: Cash and inventory are current assets.

Read in:Chapter 25
Edexcel Business

Current assets

Assets expected to turn into cash or be used within about a year.

Example: Cash and inventory are current assets.

Business Studies

Current liabilities

Amounts a business must usually pay within one year.

Example: Bills due next month are current liabilities.

Read in:Chapter 25
Edexcel Business

Current liabilities

Amounts a business must usually pay within one year.

Example: Bills due next month are current liabilities.

Accounting

Current liability

An amount normally due to be paid within one year.

Example: A bill due next month is a current liability.

Read in:Chapter 2
AS & A Level Business

Current liability

A debt expected to be settled within a year or the normal operating cycle.

Example: A supplier invoice due in 30 days is a current liability.

Read in:Topic 10.1
Accounting

Current ratio

Current assets divided by current liabilities.

Example: $6,000 current assets and $3,000 current liabilities give 2:1.

AS & A Level Business

Current ratio

Current assets divided by current liabilities; a measure of short-term liquidity.

Example: Assets of $60,000 and liabilities of $30,000 give a ratio of 2:1.

Read in:Topic 10.2
Business Studies

Current ratio

Current assets divided by current liabilities.

Example: $12,000 current assets divided by $6,000 current liabilities gives 2:1.

Read in:Chapter 26
Edexcel Business

Current ratio

Current assets divided by current liabilities.

Example: $12,000 current assets divided by $6,000 current liabilities gives 2:1.

Read in:Chapter 31
Edexcel Business

Curriculum vitae

A document summarising someone's education, skills and work experience.

Example: An applicant includes qualifications and past jobs in their CV.

Read in:Chapter 18
Edexcel Business

Customer focus

Making decisions based on understanding and satisfying customer requirements.

Example: A firm improves a service after analysing complaints.

Read in:Chapter 45
Edexcel Business

Customer loyalty

When customers repeatedly choose the same business or brand.

Example: A shopper keeps buying from the same bakery.

Edexcel Business

Customer needs

Things customers expect or require from a product or service.

Example: Commuters need reliable and affordable transport.

AS & A Level Business

Customer orientation

Starting decisions with customers' needs and preferences.

Example: A manufacturer designs products after asking customers what they want.

Read in:Topic 3.1
Edexcel Business

Customer relationship

The ongoing connection between a business and its customers.

Example: A shop responds to complaints and offers useful support.

Read in:Chapter 34
Edexcel Business

Customer satisfaction

How well a product or service meets customer expectations.

Example: A customer is satisfied when a repair is completed on time.

AS & A Level Economics

Customs union

A free trade area with a common external tariff against non-members.

Example: Members remove internal tariffs and agree one tariff for imports from elsewhere.

Read in:Chapter 32
Computer Science

Cyber security

Protecting computer systems, networks and information from attacks.

Example: A school uses security controls to protect student data.

Read in:Topic 5.3
Mathematics

Cyclic quadrilateral

A four-sided shape with all four vertices on one circle.

Example: Opposite angles of a cyclic quadrilateral total 180°.

Read in:Chapter 38
AS & A Level Business

Cyclical unemployment

Joblessness caused by weak demand during an economic downturn.

Example: A hotel lays off staff during a recession.

Read in:Topic 6.1
AS & A Level Economics

Cyclical unemployment

Unemployment caused by falling demand during an economic downturn.

Example: Retailers lay off staff when spending falls.

Economics

Cyclical unemployment

Unemployment caused by falling demand during an economic downturn.

Example: Retailers lay off staff when spending falls.

Read in:Chapter 30

D Dictionary terms

Computer Science

Data compression

Reducing the number of bits needed to store or transmit information.

Example: Compressing a file can make it quicker to send.

Read in:Topic 1.3
Computer Science

Data packet

A small unit of data sent across a network, usually with addressing information.

Example: A large file is split into packets before being sent.

Read in:Topic 2.1
ICT

Data packet

A small unit of data sent across a network with routing information.

Example: A large file is sent in many packets.

Read in:Chapter 4
ICT

Data protection

Rules and practices used to handle people's personal information responsibly.

Example: A school restricts access to student records.

Read in:Chapter 8
ICT

Data security

Protecting stored or transmitted information against unauthorised use.

Example: A home security camera needs a strong password.

Read in:Chapter 5
Computer Science

Data storage

Keeping data so it can be used later.

Example: A computer saves a document on an SSD.

Read in:Topic 1.3
ICT

Data transfer rate

The speed at which data moves between storage and a computer.

Example: A fast SSD copies large files sooner.

Read in:Chapter 3
Computer Science

Data type

The kind of value a field or variable can store.

Example: An age field may use the integer data type.

Read in:Topic 9.1
ICT

Data type

The kind of value a field is allowed to store.

Example: An age field uses an integer data type.

Read in:Chapter 7
Computer Science

Data validation

Checks that an input follows required rules.

Example: A form rejects a date with month 15.

Read in:Topic 9.1
Computer Science

Database

An organised collection of data that can be searched and updated.

Example: A school database stores pupils and classes.

Read in:Topic 9.1
Business Studies

De-industrialisation

A fall in the importance of manufacturing in an economy.

Example: Factory jobs decline while service jobs increase.

Read in:Chapter 2
AS & A Level Economics

Deadweight loss

Lost net benefit when a market produces too much or too little compared with the efficient level.

Example: Pollution can cause output above the socially efficient level and a welfare loss.

AS & A Level Economics

Death rate

The number of deaths each year per 1,000 people.

Example: A death rate of 8 means eight deaths per 1,000 people annually.

Read in:Chapter 30
Economics

Death rate

The number of deaths each year per 1,000 people.

Example: A death rate of 8 means eight deaths per 1,000 people annually.

Read in:Chapter 34
Accounting

Debenture

A long-term loan to a company, often at a fixed interest rate.

Example: A company issues a $10,000 debenture to borrow funds.

Read in:Chapter 17
Accounting

Debenture interest

The finance cost paid on money borrowed through debentures.

Example: A 6% debenture on $10,000 has annual interest of $600.

Read in:Chapter 17
Edexcel Business

Debentures

Long-term debt certificates issued by a company to raise finance.

Example: A company sells debentures and pays interest to lenders.

Read in:Chapter 25
Accounting

Debit

An entry on the left side of a T-account.

Example: Buying equipment for cash debits the equipment account.

Read in:Chapter 3
Accounting

Debit balance

An account balance with more debit entries than credit entries.

Example: The equipment account normally has a debit balance.

Read in:Chapter 6
Accounting

Debit note

A document sent by a buyer to request a reduction in the amount owed.

Example: A shop sends a debit note when returning faulty stock.

Read in:Chapter 4
AS & A Level Economics

Debt

Money that someone owes to another person or organisation.

Example: A loan balance is a debt.

Read in:Chapter 31
Economics

Debt

Money that someone owes to another person or organisation.

Example: A loan balance is a debt.

Read in:Chapter 17
AS & A Level Business

Debt factoring

Selling money owed by customers to a factor for quicker cash, usually at a discount or fee.

Example: A business sells $10,000 of invoices to receive most of the cash immediately.

Read in:Topic 5.2
AS & A Level Economics

Debt relief

Cancellation or reduction of money owed by a country or borrower.

Example: Creditors write off part of a country's external debt.

Read in:Chapter 31
Computer Science

Debugger

A tool that helps find errors by stepping through a program.

Example: A debugger lets a student inspect variable values.

Read in:Topic 4.2
Computer Science

Debugging

Finding and correcting errors in code or algorithms.

Example: A programmer inspects values to find a bug.

Read in:Topic 7.8
Mathematics

Decay factor

The number multiplied each period during percentage decrease.

Example: 8% yearly decay uses the factor 0.92.

Read in:Chapter 17
AS & A Level Business

Decentralisation

Giving decision-making power to lower levels or local branches.

Example: Store managers choose products for their regions.

Read in:Topic 7.1
Computer Science

Decentralisation

Spreading control among multiple participants instead of one central authority.

Example: A decentralised network has no single controlling server.

Read in:Topic 5.2
Edexcel Business

Decentralisation

Giving decision-making power to lower levels or local branches.

Example: Store managers choose products for their regions.

Read in:Chapter 23
Mathematics

Decimal place

The position of a digit after the decimal point.

Example: In 2.57, 5 is in the first decimal place.

Read in:Chapter 4
Mathematics

Decimal places

How many digits appear after a decimal point.

Example: 3.142 rounded to two decimal places is 3.14.

Read in:Chapter 9
Mathematics

Decimal point

The mark separating whole-number and fractional parts.

Example: 3.75 has a decimal point between 3 and 7.

Read in:Chapter 8
Computer Science

Decision

A point where an algorithm chooses between alternatives.

Example: IF the balance is enough, allow payment.

Read in:Topic 7.3
AS & A Level Economics

Decision making

Comparing options and choosing one.

Example: A school decides which equipment to buy with limited funds.

Economics

Decision making

Comparing options and choosing one.

Example: A school decides which equipment to buy with limited funds.

Read in:Chapter 3
AS & A Level Business

Decision tree

A diagram showing choices, possible outcomes and their probabilities.

Example: A company compares the possible returns from two locations.

Read in:Topic 6.2
Edexcel Business

Decline

A product-life-cycle stage when sales start to fall.

Example: Demand for DVD players falls as streaming grows.

Read in:Chapter 36
Computer Science

Decomposition

Breaking a large problem into smaller manageable parts.

Example: A game is divided into scoring, movement and menu tasks.

Read in:Topic 7.1
Accounting

Decrease in provision

A fall in the estimated amount of doubtful customer debts.

Example: The allowance falls from $300 to $200, reducing expense by $100.

Read in:Chapter 13
Computer Science

Decryption

Changing encrypted data back into readable information.

Example: A recipient decrypts a message using the correct key.

Read in:Topic 2.3
Edexcel Business

Deed of partnership

A legal agreement setting out how partners run a business and share profits.

Example: Two architects agree their responsibilities in a partnership deed.

Read in:Chapter 3
Accounting

Deficit

When a non-profit organisation's expenses exceed its income.

Example: A club spends $900 but earns $750, giving a $150 deficit.

Read in:Chapter 18
AS & A Level Economics

Deflation

A sustained fall in the general price level.

Example: The average price level falls for several months.

Read in:Chapter 10
Economics

Deflation

A sustained fall in the general price level.

Example: The average price level falls for several months.

Read in:Chapter 31
Mathematics

Degree of accuracy

How precisely a value is measured or rounded.

Example: A mass given to 0.1 kg is more precise than one given to 1 kg.

Read in:Chapter 10
AS & A Level Economics

Deindustrialisation

A long-term decline in manufacturing's share of employment or output.

Example: As services expand, manufacturing employs a smaller share of workers.

Read in:Chapter 32
Edexcel Business

Deindustrialisation

A fall in the importance of manufacturing in an economy.

Example: Factory jobs decline while service jobs increase.

Read in:Chapter 7
AS & A Level Business

Delayering

Removing levels of management to create a flatter structure.

Example: A business removes one middle-management layer.

Read in:Topic 7.1
Business Studies

Delayering

Removing levels of management from an organisation.

Example: A firm removes an unnecessary middle-management layer.

Read in:Chapter 7
AS & A Level Business

Delegation

Passing authority to another person to carry out a task while keeping overall accountability.

Example: A manager allows a team leader to approve staff rotas.

Read in:Topic 7.1
Business Studies

Delegation

Giving another employee authority to carry out a task while keeping overall responsibility.

Example: A manager asks a supervisor to organise the rota.

Read in:Chapter 7
Edexcel Business

Delegation

Giving another employee authority to carry out a task while keeping overall responsibility.

Example: A manager asks a supervisor to organise the rota.

Read in:Chapter 23
AS & A Level Business

Demand

The amount consumers are willing and able to buy at different prices.

Example: More people buy a product when its price falls, other things equal.

Read in:Topic 3.1
AS & A Level Economics

Demand

The quantity buyers are willing and able to buy at different prices.

Example: People may buy more apples when their price falls.

Economics

Demand

The quantity buyers are willing and able to buy at different prices.

Example: People may buy more apples when their price falls.

AS & A Level Economics

Demand curve

A graph showing the relationship between price and quantity demanded.

Example: An ordinary demand curve slopes down from left to right.

Economics

Demand curve

A graph showing the relationship between price and quantity demanded.

Example: An ordinary demand curve slopes down from left to right.

Read in:Chapter 7
Economics

Demand decrease

When buyers want less at each price.

Example: Concerns about safety reduce demand for a product.

Read in:Chapter 10
AS & A Level Economics

Demand for labour

The number of workers firms are willing and able to hire at different wage rates.

Example: More restaurants hire cooks when demand for meals grows.

Read in:Chapter 23
Economics

Demand for labour

The number of workers firms are willing and able to hire at different wage rates.

Example: More restaurants hire cooks when demand for meals grows.

Read in:Chapter 18
Economics

Demand increase

When buyers want more at each price.

Example: A popular advertisement increases demand for a brand.

Read in:Chapter 10
AS & A Level Economics

Demand-deficient unemployment

Joblessness caused by insufficient aggregate demand for goods and services.

Example: A recession reduces orders and firms lay off staff.

Read in:Chapter 26
AS & A Level Business

Demand-pull inflation

Inflation caused when total spending grows faster than the economy can supply goods and services.

Example: Strong consumer demand pushes prices up.

Read in:Topic 6.1
AS & A Level Economics

Demand-pull inflation

Inflation caused by total spending growing faster than the economy can produce.

Example: Strong consumer demand pushes up prices when factories are full.

Read in:Chapter 10
Economics

Demand-pull inflation

Inflation caused by total spending growing faster than the economy can produce.

Example: Strong consumer demand pushes up prices when factories are full.

Read in:Chapter 31
AS & A Level Economics

Demerit good

A product that can harm users or others and may be over-consumed.

Example: Cigarettes are often treated as demerit goods.

Read in:Chapter 21
Economics

Demerit good

A product that can harm users or others and may be over-consumed.

Example: Cigarettes are often treated as demerit goods.

Read in:Chapter 14
AS & A Level Business

Democratic leadership

A style where employees can contribute to decisions.

Example: A manager invites ideas before changing shift arrangements.

Read in:Topic 7.3
Business Studies

Democratic leadership

A leadership style where employees help with decision-making.

Example: A manager asks the team to vote on an idea.

Read in:Chapter 7
AS & A Level Business

Democratic management

A style in which employees contribute ideas before decisions are made.

Example: Staff discuss how to improve a production process.

Read in:Topic 2.3
AS & A Level Business

Demographic change

A change in the size, age or characteristics of a population.

Example: An ageing population increases demand for healthcare.

Read in:Topic 6.1
Edexcel Business

Demographic change

A change in the size, age or characteristics of a population.

Example: An ageing population increases demand for healthcare.

Read in:Chapter 13
Edexcel Business

Demographic segmentation

Dividing customers by measurable characteristics such as age, income or family size.

Example: A toy company targets products by children's age ranges.

Read in:Chapter 35
Computer Science

Denary

The ordinary number system that uses the digits 0 to 9.

Example: The denary number 12 is 1100 in binary.

Read in:Topic 1.1
Computer Science

Denial-of-service attack

Overloading a service so legitimate users cannot access it.

Example: A website becomes unavailable after a flood of requests.

Read in:Topic 5.3
Mathematics

Denominator

The bottom number in a fraction; it tells how many equal parts make a whole.

Example: In 3/8, the denominator is 8.

Read in:Chapter 4
Economics

Dependency ratio

The number of dependants compared with the working-age population.

Example: A high ratio means fewer working-age people support more dependants.

Read in:Chapter 34
Accounting

Depreciation

Allocating the cost of a non-current asset over its useful life.

Example: A $5,000 machine is charged as an expense over five years.

Read in:Chapter 11
AS & A Level Business

Depreciation

Spreading the cost of a non-current asset over its useful life in the accounts.

Example: A $10,000 machine is depreciated over five years.

Read in:Topic 10.1
Business Studies

Depreciation

A fall in the recorded value of a non-current asset over time.

Example: A delivery van loses value as it ages and is used.

Read in:Chapter 24
Edexcel Business

Depreciation

A fall in the recorded value of a non-current asset over time.

Example: A delivery van loses value as it ages and is used.

Read in:Chapter 11
Mathematics

Depreciation

A decrease in the value of an asset over time.

Example: A computer worth $800 loses 15% of its value each year.

Read in:Chapter 17
Business Studies

Depreciation of currency

When a currency falls in value compared with another currency.

Example: A weaker currency can make exports cheaper abroad.

Read in:Chapter 29
AS & A Level Economics

Deregulation

Removing or simplifying government rules for businesses.

Example: Simpler licensing rules may make it easier to start a firm.

Economics

Deregulation

Removing or simplifying government rules for businesses.

Example: Simpler licensing rules may make it easier to start a firm.

Read in:Chapter 28
Edexcel Business

Deregulation

Removing or simplifying government rules for businesses.

Example: Simpler licensing rules may make it easier to start a firm.

Read in:Chapter 5
AS & A Level Economics

Derived demand

Demand for an input that comes from demand for the product it helps make.

Example: More demand for houses increases demand for builders.

Economics

Derived demand

Demand for an input that comes from demand for the product it helps make.

Example: More demand for houses increases demand for builders.

Read in:Chapter 21
AS & A Level Economics

Derived demand for labour

Demand for workers arising from demand for the goods and services they make.

Example: Higher housing demand increases demand for bricklayers.

Read in:Chapter 23
Mathematics

Descending order

Arranging numbers from largest to smallest.

Example: 9, 4, −1 is descending order.

Read in:Chapter 5
Computer Science

Design

Planning how a system or program will work before building it.

Example: A flowchart describes a program's decisions.

Read in:Topic 7.1
ICT

Desktop computer

A computer designed mainly for use in one place.

Example: A school office uses a desktop computer.

Read in:Chapter 1
AS & A Level Economics

Devaluation

A deliberate lowering of an official exchange rate in a fixed-rate system.

Example: The government sets a lower value for its currency.

Read in:Chapter 29
Economics

Devaluation

A deliberate lowering of an official exchange rate in a fixed-rate system.

Example: The government sets a lower value for its currency.

Read in:Chapter 38
Business Studies

Developed economy

A country with generally higher average incomes and more advanced infrastructure.

Example: A developed economy usually has a large service sector.

Read in:Chapter 2
Economics

Developed economy

A country with relatively high incomes and strong infrastructure and public services.

Example: A developed economy often has widespread access to healthcare.

Read in:Chapter 35
Business Studies

Developing economy

A country where average incomes and living standards are generally lower and developing.

Example: Farming may employ many workers in a developing economy.

Read in:Chapter 2
Economics

Developing economy

A country with lower average incomes and more development challenges than richer economies.

Example: Some developing economies lack reliable electricity in rural areas.

Read in:Chapter 35
AS & A Level Economics

Development diamond

A diagram comparing several social and economic development measures.

Example: A chart plots income, health, education and access to clean water.

Read in:Chapter 30
Computer Science

Device driver

Software that lets an operating system communicate with a device.

Example: A printer driver allows printing.

Read in:Topic 4.1
Mathematics

Difference

The amount by which two numbers are apart.

Example: The difference between 12 and 7 is 5.

Read in:Chapter 6
Mathematics

Difference of squares

A subtraction of two squared expressions that can be factorised.

Example: x² − 9 = (x − 3)(x + 3).

Read in:Chapter 20
AS & A Level Business

Differentiation strategy

Competing by offering benefits customers see as different or better.

Example: A café offers unique recipes and locally sourced ingredients.

Read in:Topic 8.2
ICT

Digital certificate

An electronic document used to help prove a website's or organisation's identity.

Example: A browser checks a site's certificate when opening an HTTPS page.

Read in:Chapter 8
Computer Science

Digital currency

Money or a payment value that exists electronically.

Example: A customer pays using a digital balance.

Read in:Topic 5.2
ICT

Digital data

Information represented using separate values, usually binary digits.

Example: A digital photograph is stored as numbers.

Read in:Chapter 1
Computer Science

Digital signal

A signal represented by separate values, often binary numbers.

Example: A recorded sound file contains digital values.

Read in:Topic 1.2
ICT

Digital versatile disc

An optical disc that holds more data than a CD.

Example: A DVD may store a film.

Read in:Chapter 3
Computer Science

Digital wallet

An app or device used to manage digital payment credentials or crypto keys.

Example: A digital wallet helps a user make a payment.

Read in:Topic 5.2
Computer Science

Digital-to-analogue converter

A component that changes digital values into analogue signals.

Example: A DAC can produce a sound signal from digital audio.

Read in:Topic 6.1
ICT

Digital-to-analogue converter

A device that turns digital values into an analogue signal.

Example: A DAC creates sound signals for speakers.

Read in:Chapter 2
AS & A Level Economics

Diminishing marginal utility

The principle that each extra unit usually gives less additional satisfaction than the one before.

Example: A fifth cup of tea gives less extra enjoyment than the first.

Read in:Chapter 14
ICT

Direct access

Finding a stored file without reading every earlier file in order.

Example: An HDD can locate a chosen file directly.

Read in:Chapter 3
ICT

Direct changeover

Replacing the old system with the new one at a single point in time.

Example: A shop switches fully to a new till system overnight.

Read in:Chapter 7
AS & A Level Business

Direct cost

A cost that can be traced to a particular product or service.

Example: Wood used in one table is a direct cost.

Read in:Topic 5.4
ICT

Direct data entry

Capturing information straight from its source with little or no typing.

Example: A barcode reader enters a product code automatically.

Read in:Chapter 2
Accounting

Direct debit

Permission for an organisation to collect money directly from an account.

Example: A utility company collects the amount due each month.

Read in:Chapter 8
Accounting

Direct expenses

Costs directly traceable to producing a particular item, other than materials and labour.

Example: A special design fee for one product may be a direct expense.

Read in:Chapter 19
Accounting

Direct labour

Wages of workers directly involved in making the product.

Example: Pay for someone assembling bicycles is direct labour.

Read in:Chapter 19
Edexcel Business

Direct mail

Promotional messages sent straight to named potential customers.

Example: A local shop posts discount leaflets to nearby households.

Read in:Chapter 39
Accounting

Direct material

Raw material that can be traced to a particular product.

Example: Wood used to make a table is direct material.

Read in:Chapter 19
Mathematics

Direct proportion

Two quantities change so that their ratio stays constant.

Example: If apples cost $2 each, cost is directly proportional to number bought.

Read in:Chapter 26
Edexcel Business

Direct selling

Selling products directly to customers without relying on a conventional retail shop.

Example: A farmer sells vegetables through a weekly subscription.

Read in:Chapter 38
Mathematics

Direct share

Dividing a total according to given ratio parts.

Example: Share $50 in the ratio 2:3 to get $20 and $30.

Read in:Chapter 11
AS & A Level Economics

Direct tax

A tax paid directly on income, profits or wealth.

Example: Income tax is a direct tax.

Read in:Chapter 22
Economics

Direct tax

A tax paid directly on income, profits or wealth.

Example: Income tax is a direct tax.

Read in:Chapter 26
AS & A Level Business

Directing

Guiding and supporting employees to carry out plans.

Example: A supervisor explains priorities at the start of a shift.

Read in:Topic 2.3
Mathematics

Direction

The way in which a movement or vector points.

Example: North-east is a direction.

Read in:Chapter 43
Edexcel Business

Disability discrimination

Unfair treatment of someone because of a disability.

Example: An employer refuses a reasonable adjustment for a qualified worker.

Read in:Chapter 19
Accounting

Disclosure

Providing important additional information in or alongside the financial statements.

Example: Notes explain which depreciation method is used.

Read in:Chapter 27
Mathematics

Discount

An amount taken off the normal price.

Example: A 10% discount on $40 saves $4.

Read in:Chapter 16
AS & A Level Business

Discount rate

The percentage used to convert future cash flows into present values.

Example: A firm uses an 8% discount rate to assess a project.

Read in:Topic 10.3
AS & A Level Business

Discounted cash flow

A method that gives future cash flows less value than cash received today.

Example: Cash expected next year is converted to present value.

Read in:Topic 10.3
Edexcel Business

Discounts

Reductions from the usual selling price.

Example: A shop offers 20% off winter coats.

AS & A Level Economics

Discouraged worker

Someone who wants work but has stopped looking because they believe none is available.

Example: A job seeker gives up searching after repeated rejections.

Read in:Chapter 9
Mathematics

Discrete data

Numerical data that takes separate countable values.

Example: Number of siblings is discrete data.

Read in:Chapter 45
AS & A Level Economics

Discretionary fiscal policy

Deliberate changes in taxation or public spending to influence the economy.

Example: A government approves extra infrastructure spending during a recession.

Business Studies

Discrimination

Treating someone unfairly because of a personal characteristic, such as age or sex.

Example: A qualified person is rejected because of their age.

Read in:Chapter 8
Edexcel Business

Discrimination

Treating someone unfairly because of a personal characteristic, such as age or sex.

Example: A qualified person is rejected because of their age.

Read in:Chapter 19
AS & A Level Business

Diseconomies of scale

Rising average costs caused by a business becoming too large or difficult to manage.

Example: A large firm experiences slow communication between departments.

Read in:Topic 1.3
AS & A Level Economics

Diseconomies of scale

A rise in average cost when a business grows too large.

Example: Poor communication across a huge company can raise unit costs.

Read in:Chapter 17
Business Studies

Diseconomies of scale

Problems of being too large that cause average costs to increase.

Example: A huge organisation wastes time because messages pass through many managers.

Read in:Chapter 19
Edexcel Business

Diseconomies of scale

Problems of being too large that cause average costs to increase.

Example: A huge organisation wastes time because messages pass through many managers.

Read in:Chapter 40
AS & A Level Business

Diseconomy of scale

A rise in average cost when an operation becomes too large or difficult to coordinate.

Example: A huge factory loses efficiency through poor communication.

Read in:Topic 4.3
AS & A Level Economics

Disequilibrium

When the amount buyers want differs from the amount sellers offer.

Example: At a very low price, demand exceeds supply.

Economics

Disequilibrium

When the amount buyers want differs from the amount sellers offer.

Example: At a very low price, demand exceeds supply.

AS & A Level Economics

Disequilibrium unemployment

Unemployment caused when wages exceed the market-clearing level or demand is insufficient.

Example: A wage floor above equilibrium may create excess labour supply.

Read in:Chapter 26
Accounting

Dishonoured cheque

A cheque that the bank refuses to pay.

Example: A customer's cheque is returned because they lack funds.

AS & A Level Economics

Disinflation

A fall in the rate of inflation, while prices still rise overall.

Example: Inflation slows from 8% to 4%, but prices keep increasing.

Read in:Chapter 10
Economics

Disinflation

A fall in the rate of inflation, while prices still rise overall.

Example: Inflation slows from 8% to 4%, but prices keep increasing.

Read in:Chapter 31
Business Studies

Dismissal

When an employer ends an employee's job, often because of conduct or performance.

Example: An employee is dismissed after repeated serious misconduct.

Read in:Chapter 8
AS & A Level Economics

Disposable income

Money left after direct taxes that can be spent or saved.

Example: A worker has $900 left after income tax.

Economics

Disposable income

Money left after direct taxes that can be spent or saved.

Example: A worker has $900 left after income tax.

Read in:Chapter 17
Accounting

Disposal account

An account used to work out profit or loss when a non-current asset is sold or discarded.

Example: The sale of an old delivery van is recorded in a disposal account.

Read in:Chapter 11
Mathematics

Distance

How far something travels or how far apart two positions are.

Example: At 5 m/s for 4 seconds, the distance is 20 m.

Read in:Chapter 12
Mathematics

Distance formula

A rule for finding the straight-line distance between coordinate points.

Example: The distance from (0,0) to (3,4) is 5.

Read in:Chapter 31
Mathematics

Distance-time graph

A graph showing how far something is from a starting point as time passes.

Example: A horizontal segment shows no change in distance from the start.

Read in:Chapter 27
Computer Science

Distributed ledger

A record of transactions stored and updated on multiple computers.

Example: Many nodes hold copies of the same transaction history.

Read in:Topic 5.2
AS & A Level Business

Distribution channel

The route a product takes from producer to customer.

Example: A manufacturer sells through a wholesaler and retailer.

Read in:Topic 3.3
Business Studies

Distribution channel

The route a product takes from producer to final customer.

Example: A maker sells goods through a wholesaler and retailer.

Read in:Chapter 14
Edexcel Business

Distribution channel

The route a product takes from producer to final customer.

Example: A maker sells goods through a wholesaler and retailer.

Read in:Chapter 38
Mathematics

Distributive law

Multiplication shared across addition or subtraction inside brackets.

Example: 2(a + b) = 2a + 2b.

Read in:Chapter 20
AS & A Level Business

Diversification

Moving into new products or markets to spread risk or grow.

Example: A clothing business launches a homeware range.

Accounting

Dividend

A distribution of company profits to shareholders.

Example: A company pays a $0.10 dividend per ordinary share.

Read in:Chapter 17
AS & A Level Business

Dividend

A payment from company profit to shareholders, if declared.

Example: Investors receive 20 cents per share.

Read in:Topic 10.4
Business Studies

Dividend

Part of a company's profit paid to shareholders.

Example: A company pays its shareholders $0.20 for each share owned.

AS & A Level Business

Dividend cover

A measure of how many times profit available to ordinary shareholders covers ordinary dividends.

Example: Earnings of $80,000 and dividends of $40,000 give cover of two times.

Read in:Topic 10.2
AS & A Level Business

Dividend policy

A company's approach to deciding how much profit to distribute to shareholders.

Example: A business pays small dividends while investing heavily.

Read in:Topic 10.4
Edexcel Business

Dividends

Payments of company profits distributed to shareholders.

Example: A company pays shareholders 5p per share.

Mathematics

Division

Sharing into equal groups or finding how many times one number fits into another.

Example: 20 ÷ 5 = 4.

Read in:Chapter 6
AS & A Level Economics

Division of labour

Splitting production into smaller tasks performed by different workers.

Example: One worker cuts fabric while another sews the clothes.

Business Studies

Division of labour

Splitting a production process into tasks, with different workers doing each task.

Example: One worker cuts fabric while another stitches shirts.

Read in:Chapter 1
Economics

Division of labour

Dividing production into specialised tasks performed by different workers.

Example: In a bakery, one team mixes dough and another packages bread.

Edexcel Business

Division of labour

Splitting a production process into tasks, with different workers doing each task.

Example: One worker cuts fabric while another stitches shirts.

Read in:Chapter 44
Edexcel Business

Dog product

A Boston matrix product with low market share in a slow-growing market.

Example: An outdated product earns little in a shrinking market.

Read in:Chapter 36
Mathematics

Domain

The set of input values allowed for a function.

Example: If x can be 1, 2 or 3, those values form the domain.

Read in:Chapter 30
Computer Science

Domain Name System

A system that translates domain names into IP addresses.

Example: DNS helps find the server for igcse360.com.

Read in:Topic 5.1
ICT

Dongle

A small device used as an access or licence key for software.

Example: Specialist software runs only while a security dongle is connected.

Read in:Chapter 9
ICT

Dot matrix printer

An impact printer that creates characters with pins striking a ribbon.

Example: A business prints multi-part forms with a dot matrix printer.

Read in:Chapter 2
Accounting

Double entry

Recording every transaction as equal debit and credit entries in accounts.

Example: Paying rent debits rent expense and credits cash.

ICT

Double entry verification

Entering the same data twice and comparing the entries for differences.

Example: A password confirmation field checks both entries match.

Read in:Chapter 7
Computer Science

Double-entry verification

Entering data twice and comparing the two versions.

Example: A user types a new password twice.

Read in:Topic 7.5
Accounting

Doubtful debt

A debt that may not be paid, even though it has not yet been confirmed as lost.

Example: A customer who is months late may be a doubtful debtor.

Read in:Chapter 13
Edexcel Business

Downsizing

Reducing a business's workforce or operations to cut costs or improve efficiency.

Example: A company closes one office and removes some posts.

Read in:Chapter 41
Edexcel Business

Downward communication

Information sent from higher levels of an organisation to employees below.

Example: A director gives instructions to team leaders.

Read in:Chapter 16
Accounting

Drawings

Cash or goods taken from the business by its owner for personal use.

Example: A sole trader withdraws $100 for personal shopping.

Read in:Chapter 2
Edexcel Business

Drones

Uncrewed aircraft that can be controlled remotely or fly automatically.

Example: A farmer uses a drone to inspect crop health.

Read in:Chapter 43
Computer Science

Dry run

Following an algorithm by hand to check its steps and results.

Example: A student tests pseudocode without running it on a computer.

Read in:Topic 7.7
Accounting

Duality principle

Every accounting transaction has two effects that keep the accounting equation balanced.

Example: Buying stock for cash increases stock and reduces cash.

Read in:Chapter 26
Mathematics

Duration

How long an event lasts.

Example: A film from 15:20 to 17:05 lasts 1 hour 45 minutes.

Read in:Chapter 15
AS & A Level Economics

Dynamic efficiency

Improving products and production methods through investment and innovation over time.

Example: A firm develops more efficient batteries for future electric cars.

Read in:Chapter 15
Business Studies

Dynamic pricing

Changing prices as demand or other conditions change.

Example: Airline ticket prices increase as seats fill up.

E Dictionary terms

Business Studies

E-commerce

Buying and selling goods or services over the internet.

Example: A customer orders shoes from a website.

Edexcel Business

E-commerce

Buying and selling goods or services over the internet.

Example: A customer orders shoes from a website.

ICT

E-publication

A publication provided in electronic form.

Example: An e-book is an e-publication.

Read in:Chapter 6
ICT

E-safety

Staying safe when using digital devices, online services and the internet.

Example: A student avoids sharing personal details with strangers.

Read in:Chapter 8
Edexcel Business

E-tailing

Selling products to customers through online retail websites or apps.

Example: A shoe retailer takes orders through its website.

Computer Science

Echo check

Sending received data back to the sender for comparison.

Example: The sender checks whether an echoed message matches.

Read in:Topic 2.2
Economics

Economic agent

A person or organisation making economic choices.

Example: Households, firms and governments are economic agents.

Read in:Chapter 5
AS & A Level Economics

Economic cycle

The pattern of rises and falls in economic activity over time.

Example: Growth may slow before the economy recovers.

Read in:Chapter 12
Economics

Economic cycle

The pattern of rises and falls in economic activity over time.

Example: Growth may slow before the economy recovers.

Read in:Chapter 29
AS & A Level Economics

Economic development

Improvements in people's living standards, health, education and opportunities.

Example: A country improves literacy, healthcare and incomes.

Read in:Chapter 30
Economics

Economic development

Improvements in people's living standards, health, education and opportunities.

Example: A country improves literacy, healthcare and incomes.

Read in:Chapter 35
Edexcel Business

Economic development

Improvements in people's living standards, health, education and opportunities.

Example: A country improves literacy, healthcare and incomes.

Economics

Economic diversification

Developing a wider range of industries and activities.

Example: A country expands manufacturing and tourism rather than relying only on oil.

Read in:Chapter 35
AS & A Level Business

Economic growth

An increase in the amount of goods and services an economy produces over time.

Example: National output rises by 3% over a year.

Read in:Topic 6.1
AS & A Level Economics

Economic growth

An increase in the amount of goods and services an economy can produce over time.

Example: New technology helps a country produce more each year.

Economics

Economic growth

An increase in the amount of goods and services an economy can produce over time.

Example: New technology helps a country produce more each year.

Edexcel Business

Economic growth

An increase in the amount of goods and services an economy produces over time.

Example: National output rises by 3% over a year.

Read in:Chapter 12
AS & A Level Economics

Economic integration

Countries reducing barriers so trade, investment or economic policy become more closely linked.

Example: Neighbouring countries form a common trading area.

Read in:Chapter 32
AS & A Level Economics

Economic interdependence

When developments in one country have important effects on others.

Example: A global shortage of semiconductors disrupts vehicle factories worldwide.

Read in:Chapter 32
Economics

Economic planning

Government decisions about how resources should be used.

Example: A government sets targets for electricity production.

Read in:Chapter 13
AS & A Level Economics

Economic problem

People have unlimited wants but limited resources, so choices must be made.

Example: A council must decide whether to spend its budget on schools or roads.

Read in:Chapter 1
Economics

Economic problem

People have unlimited wants but limited resources, so choices must be made.

Example: A council must decide whether to spend its budget on schools or roads.

Business Studies

Economic problem

People have unlimited wants, but resources to meet them are limited.

Example: A government must decide how to spend its limited budget.

Read in:Chapter 1
AS & A Level Economics

Economic rent

Payment to a factor of production above the minimum needed to keep it in its current use.

Example: A star athlete's earnings may exceed their transfer earnings.

Read in:Chapter 23
Economics

Economic stability

Avoiding large swings in output, prices and employment.

Example: Steady growth with predictable inflation suggests greater stability.

Read in:Chapter 25
AS & A Level Economics

Economic system

The way a society organises production and distributes resources.

Example: Countries use different mixes of private markets and government decisions.

Read in:Chapter 31
Economics

Economic system

The way a society organises production and distributes resources.

Example: Countries use different mixes of private markets and government decisions.

Read in:Chapter 13
AS & A Level Business

Economies of scale

Cost advantages that can lower average cost as output increases.

Example: Buying materials in bulk reduces cost per item.

AS & A Level Economics

Economies of scale

Lower average production costs that can result when a firm produces on a larger scale.

Example: A big bakery buys flour in bulk and lowers cost per loaf.

Economics

Economies of scale

Lower average production costs that can result when a firm produces on a larger scale.

Example: A big bakery buys flour in bulk and lowers cost per loaf.

Read in:Chapter 36
Business Studies

Economies of scale

Cost advantages a business gains when its average cost falls as it produces more.

Example: A large factory buys materials more cheaply in bulk.

Edexcel Business

Economies of scale

Cost advantages a business gains when its average cost falls as it produces more.

Example: A large factory buys materials more cheaply in bulk.

AS & A Level Economics

Education and training

Teaching and learning that improve workers’ knowledge and practical skills.

Example: A vocational course helps workers operate new machines.

Read in:Chapter 8
Economics

Education and training

Teaching and learning that improve workers’ knowledge and practical skills.

Example: A vocational course helps workers operate new machines.

Read in:Chapter 28
AS & A Level Economics

Effective demand

A desire to buy a product backed by the ability and willingness to pay.

Example: Someone wanting a laptop but unable to afford it has no effective demand at that price.

AS & A Level Business

Effectiveness

Achieving the intended result or objective.

Example: A delivery company meets its promised delivery times.

Read in:Topic 4.1
Accounting

Efficiency

How well a business uses its resources to produce results.

Example: Faster collection of customer debts can improve efficiency.

Read in:Chapter 22
AS & A Level Business

Efficiency

Using resources with as little waste as possible.

Example: A plant makes the same output with less energy.

Read in:Topic 4.1
AS & A Level Economics

Efficiency

Using resources with as little waste as possible.

Example: A factory reduces wasted materials while keeping output steady.

Economics

Efficiency

Using resources with as little waste as possible.

Example: A factory reduces wasted materials while keeping output steady.

Read in:Chapter 21
Edexcel Business

Efficiency

Using resources with as little waste as possible.

Example: A plant makes the same output with less energy.

AS & A Level Economics

Elasticity coefficient

A number showing the percentage response of one variable to a percentage change in another.

Example: A PED of −2 means demand changes by 2% in the opposite direction to price.

Read in:Chapter 3
Edexcel Business

Electronic communication

Sharing messages using electronic technology.

Example: A team discusses a project through video calls and email.

Read in:Chapter 16
ICT

Electronic funds transfer

Moving money electronically between accounts.

Example: A salary payment goes directly into an employee's bank account.

Read in:Chapter 6
ICT

Electronic funds transfer at point of sale

A system that handles electronic card payments at a checkout.

Example: A debit card payment is processed through EFTPOS.

Read in:Chapter 6
Computer Science

Element

One individual value stored inside an array.

Example: The third score is an array element.

Read in:Topic 8.2
Mathematics

Element

An individual item belonging to a set.

Example: 3 is an element of {1, 2, 3}.

Read in:Chapter 2
ICT

Email

A service for sending digital messages between users.

Example: A student emails an assignment to a teacher.

Read in:Chapter 10
ICT

Email attachment

A file sent together with an email message.

Example: A student attaches a PDF to an email.

Read in:Chapter 10
AS & A Level Economics

Embargo

An official ban on trade with a country or on certain goods.

Example: A government stops imports of a particular product.

Read in:Chapter 12
Economics

Embargo

An official ban on trade with a country or on certain goods.

Example: A government stops imports of a particular product.

Read in:Chapter 37
Computer Science

Embedded system

A computer built into a larger device to do a particular job.

Example: A washing machine contains an embedded controller.

Read in:Topic 3.1
ICT

Embedded system

A computer built into a larger device to perform a specific task.

Example: A microwave oven has an embedded controller.

Read in:Chapter 5
Edexcel Business

Emerging market

A country whose economy and consumer markets are developing rapidly.

Example: An electronics firm expands into a growing emerging market.

Read in:Chapter 9
AS & A Level Economics

Emigration

People moving out of a country to live elsewhere.

Example: A graduate leaves their home country for work.

Read in:Chapter 26
Economics

Emigration

People moving out of a country to live elsewhere.

Example: A graduate leaves their home country for work.

Read in:Chapter 34
AS & A Level Business

Emotional intelligence

The ability to understand and manage emotions in oneself and others.

Example: A leader recognises when the team is stressed and responds calmly.

Read in:Topic 7.3
AS & A Level Business

Empathy

Understanding how another person may feel.

Example: A leader listens carefully to an employee's worries.

Read in:Topic 7.3
Edexcel Business

Employee motivation

The reasons employees want to work hard and perform well.

Example: Recognition and meaningful work increase motivation.

Read in:Chapter 20
Edexcel Business

Employee participation

Involving workers in decisions that affect their work.

Example: Employees join meetings to suggest improvements.

Read in:Chapter 22
Edexcel Business

Employee retention

A business's ability to keep its workers rather than lose them.

Example: Good career opportunities help a company retain employees.

Read in:Chapter 21
Edexcel Business

Employee rights

Legal and contractual protections that workers are entitled to.

Example: An employee has the right to agreed pay and a safe workplace.

Read in:Chapter 19
Edexcel Business

Employee satisfaction

How positively workers feel about their jobs and treatment.

Example: Fair pay and supportive managers improve employee satisfaction.

Read in:Chapter 14
AS & A Level Business

Employer branding

The reputation of an organisation as a place to work.

Example: A company promotes its training and flexible schedules to job applicants.

Read in:Topic 7.4
AS & A Level Economics

Employment

Having paid work or a job.

Example: A nurse working in a hospital is employed.

Economics

Employment

Having paid work or a job.

Example: A nurse working in a hospital is employed.

Edexcel Business

Employment

Having paid work or a job.

Example: A nurse working in a hospital is employed.

Edexcel Business

Employment contract

An agreement setting out the terms on which a worker is employed.

Example: The contract states hours, salary and holiday entitlement.

Read in:Chapter 19
Edexcel Business

Employment law

Rules that protect workers and set duties for employers.

Example: An employer follows rules on wages, discrimination and safety.

Read in:Chapter 19
AS & A Level Business

Empowerment

Giving staff authority and confidence to make appropriate decisions.

Example: A service agent can approve a small refund without asking a manager.

Read in:Topic 2.2
Edexcel Business

Empowerment

Giving staff authority and confidence to make appropriate decisions.

Example: A service agent can approve a small refund without asking a manager.

Read in:Chapter 42
Computer Science

Encryption

Changing readable data into a coded form to protect it.

Example: A secure messaging app encrypts messages in transit.

Read in:Topic 2.3
ICT

Encryption

Converting readable data into coded form so only authorised users can read it.

Example: An encrypted connection protects a password sent online.

Read in:Chapter 8
Computer Science

Encryption key

Information used by an encryption algorithm to encrypt or decrypt data.

Example: A secret key unlocks an encrypted file.

Read in:Topic 2.3
Computer Science

End effector

The tool at the end of a robot arm used to do a task.

Example: A gripper picks up a component.

Read in:Topic 6.2
Computer Science

End of file

The point reached when there is no more data to read.

Example: A loop stops when it reaches the end of a file.

Read in:Topic 8.3
Mathematics

Enlargement

Changing a shape's size by multiplying lengths by the same scale factor.

Example: Enlargement by factor 2 doubles each length.

Read in:Chapter 42
AS & A Level Economics

Enterprise

The ability to organise resources and take business risks.

Example: A person opens a bakery and brings together workers and equipment.

Read in:Chapter 1
Economics

Enterprise

The ability to organise resources and take business risks.

Example: A person opens a bakery and brings together workers and equipment.

Edexcel Business

Enterprise

The skill and willingness to organise resources and take business risks.

Example: Someone sets up a delivery company using their savings.

Read in:Chapter 44
Business Studies

Enterprise

The skill and willingness to organise resources and take business risks.

Example: Someone sets up a delivery company using their savings.

Read in:Chapter 1
AS & A Level Business

Enterprise resource planning

Software that connects business data and processes across departments.

Example: An ERP system shares stock levels with purchasing and sales.

Read in:Topic 9.3
AS & A Level Business

Entrepreneur

Someone who starts and organises a business, taking risks to pursue an opportunity.

Example: A chef opens a new takeaway restaurant.

Read in:Topic 1.1
AS & A Level Economics

Entrepreneur

Someone who starts and organises a business while taking risks.

Example: A student starts a small online shop.

Read in:Chapter 1
Economics

Entrepreneur

Someone who starts and organises a business while taking risks.

Example: A student starts a small online shop.

Read in:Chapter 2
Edexcel Business

Entrepreneur

Someone who starts a business and accepts the risk of possible failure.

Example: A person opens a new online clothing store.

Business Studies

Entrepreneur

Someone who starts a business and accepts the risk of possible failure.

Example: A person opens a new online clothing store.

Read in:Chapter 3
Business Studies

Entrepreneurship

The process of starting and developing a business, often by taking risks.

Example: Launching a new delivery service is entrepreneurship.

Read in:Chapter 3
Edexcel Business

Environmental impact

The effect an activity has on air, water, land and living things.

Example: A mine may affect nearby rivers and wildlife.

Read in:Chapter 13
Edexcel Business

Environmental legislation

Laws governing business effects on the natural environment.

Example: A factory must follow legal limits on air pollution.

Read in:Chapter 12
AS & A Level Business

Environmental sustainability

Running activities in ways that protect natural resources over time.

Example: A firm switches to recyclable packaging.

Read in:Topic 6.1
AS & A Level Economics

Environmental sustainability

Using resources and managing pollution so future generations can meet their needs.

Example: Protecting forests supports long-term growth and ecosystems.

Read in:Chapter 25
Edexcel Business

Equal opportunities

Giving people fair access to jobs and development without unfair discrimination.

Example: Applicants are assessed on skills rather than gender.

Read in:Chapter 19
Mathematics

Equation

A statement that two expressions have the same value.

Example: 3x + 2 = 11 is an equation.

Read in:Chapter 23
AS & A Level Economics

Equi-marginal principle

Consumers maximise satisfaction by making marginal utility per unit of money equal across purchases.

Example: A student spends their last pound where it gives the greatest extra satisfaction.

Read in:Chapter 14
AS & A Level Economics

Equilibrium national income

The level of output where planned spending equals actual output.

Example: Firms have no unintended stock changes when planned expenditure equals income.

Read in:Chapter 24
AS & A Level Economics

Equilibrium price

The price at which quantity demanded equals quantity supplied.

Example: At $10, the market has neither shortage nor surplus.

Read in:Chapter 4
Economics

Equilibrium price

The price at which quantity demanded equals quantity supplied.

Example: At $10, the market has neither shortage nor surplus.

AS & A Level Economics

Equilibrium quantity

The quantity bought and sold at the market equilibrium price.

Example: At equilibrium, 500 bags are traded.

Read in:Chapter 4
Economics

Equilibrium quantity

The quantity bought and sold at the market equilibrium price.

Example: At equilibrium, 500 bags are traded.

Read in:Chapter 9
AS & A Level Economics

Equilibrium unemployment

Unemployment existing when labour demand and labour supply are in balance at the prevailing wage.

Example: Some job search and skill mismatch can persist without a downturn.

Read in:Chapter 26
AS & A Level Business

Equity

The owners' residual interest in business assets after liabilities.

Example: Assets of $100,000 minus liabilities of $60,000 give equity of $40,000.

Read in:Topic 10.1
AS & A Level Economics

Equity

Fairness in the way resources, opportunities or outcomes are distributed.

Example: A government may support low-income households to improve equity.

Read in:Chapter 22
Mathematics

Equivalent fractions

Fractions that have the same value despite different numerators and denominators.

Example: 1/2 and 3/6 are equivalent.

Read in:Chapter 4
ICT

Ergonomics

Designing workspaces and equipment to make them safer and more comfortable.

Example: An adjustable chair helps a student sit correctly.

Read in:Chapter 5
Mathematics

Error interval

The range of exact values that could round to a stated measurement.

Example: A measurement of 5 to the nearest whole number means 4.5 ≤ x < 5.5.

Read in:Chapter 10
Accounting

Error of commission

When an entry is made in the wrong account of the same type.

Example: A customer's payment is credited to a different customer.

Accounting

Error of omission

When a transaction is not recorded anywhere in the accounts.

Example: A $75 sale is left out completely.

Accounting

Error of original entry

When the wrong amount is first recorded and carried through both entries.

Example: A $540 purchase is entered as $450 on both sides.

Accounting

Error of principle

When a transaction is entered in the wrong type of account.

Example: A new machine is recorded as repairs expense.

Edexcel Business

Esteem needs

The need for respect, achievement and recognition.

Example: A public award makes an employee feel valued.

Read in:Chapter 21
Mathematics

Estimate

A close, sensible answer found without exact calculation.

Example: 49 × 21 is about 50 × 20 = 1,000.

Read in:Chapter 9
Accounting

Estimated value

A figure based on a reasonable judgement rather than an exact amount.

Example: A machine's residual value may be estimated at $500.

Read in:Chapter 25
Computer Science

Ethernet

A common technology for connecting devices on wired local networks.

Example: A computer uses an Ethernet cable to join a LAN.

Read in:Topic 3.4
Edexcel Business

Ethical behaviour

Acting fairly and responsibly, even where the law allows other choices.

Example: A business pays suppliers promptly and treats workers fairly.

Read in:Chapter 13
Business Studies

Ethical decision

A choice based on what is right or fair, not only what is profitable.

Example: A retailer pays suppliers fairly even if cheaper options exist.

Read in:Chapter 28
Computer Science

Evaluation

Judging whether the finished solution meets its requirements.

Example: A team checks that an app solves the user's problem.

Read in:Topic 7.1
ICT

Evaluation

Checking whether the finished system meets its requirements.

Example: Staff review whether the new system saves time.

Read in:Chapter 7
Computer Science

Even parity

A parity rule that makes the total number of 1 bits even.

Example: Three 1s need an extra 1 for even parity.

Read in:Topic 2.2
Mathematics

Event

A result or group of outcomes being considered.

Example: Rolling an even number is an event.

Read in:Chapter 44
Mathematics

Exact value

An answer written without rounding.

Example: √3 is exact; 1.732 is a rounded approximation.

Read in:Chapter 18
AS & A Level Economics

Excess demand

When buyers want more than sellers offer at the current price.

Example: At $3, customers want 200 items but shops have only 120.

Economics

Excess demand

When buyers want more than sellers offer at the current price.

Example: At $3, customers want 200 items but shops have only 120.

Read in:Chapter 9
AS & A Level Economics

Excess supply

When sellers offer more than customers want at the current price.

Example: At $20, shops have 100 unsold jackets.

Economics

Excess supply

When sellers offer more than customers want at the current price.

Example: At $20, shops have 100 unsold jackets.

Read in:Chapter 9
AS & A Level Business

Exchange rate

The price of one country's currency measured in another currency.

Example: One dollar exchanges for 0.90 euros.

Read in:Topic 6.1
AS & A Level Economics

Exchange rate

The price of one currency expressed in another currency.

Example: One dollar exchanges for 0.9 euros.

Economics

Exchange rate

The price of one currency expressed in another currency.

Example: One dollar exchanges for 0.9 euros.

Read in:Chapter 38
Edexcel Business

Exchange rate

The price of one currency measured in another currency.

Example: If $1 buys 0.90 euros, that is an exchange rate.

Business Studies

Exchange rate

The price of one currency measured in another currency.

Example: If $1 buys 0.90 euros, that is an exchange rate.

Mathematics

Exchange rate

The price of one currency expressed in another currency.

Example: If $1 buys 0.9 euros, $20 buys 18 euros.

Read in:Chapter 16
Edexcel Business

Exchange rate risk

The possibility that changing exchange rates will reduce a business's income or increase its costs.

Example: An importer pays more when the currency used to buy stock becomes stronger.

Read in:Chapter 11
AS & A Level Business

Exchange-rate depreciation

A fall in a currency's value relative to other currencies.

Example: Imported materials cost more when the home currency weakens.

Read in:Topic 6.1
AS & A Level Economics

Exchange-rate intervention

Buying or selling currency to influence its value.

Example: A central bank buys its currency to support its price.

Read in:Chapter 27
Economics

Exchange-rate intervention

Buying or selling currency to influence its value.

Example: A central bank buys its currency to support its price.

Read in:Chapter 38
AS & A Level Economics

Exchange-rate regime

The rules a country uses to manage the value of its currency.

Example: A country may choose a freely floating or fixed exchange rate.

Read in:Chapter 29
Mathematics

Expand brackets

Multiply each term inside brackets by the factor outside.

Example: 3(x + 2) = 3x + 6.

Read in:Chapter 20
AS & A Level Economics

Expansionary fiscal policy

Tax cuts or higher public spending used to increase total demand.

Example: Government builds roads to create jobs during a downturn.

Read in:Chapter 11
Economics

Expansionary fiscal policy

Tax cuts or higher public spending used to increase total demand.

Example: Government builds roads to create jobs during a downturn.

Read in:Chapter 26
AS & A Level Economics

Expansionary monetary policy

A policy that makes borrowing easier or cheaper to encourage spending.

Example: The central bank reduces interest rates during weak growth.

Read in:Chapter 11
Economics

Expansionary monetary policy

A policy that makes borrowing easier or cheaper to encourage spending.

Example: The central bank reduces interest rates during weak growth.

Read in:Chapter 27
AS & A Level Business

Expectancy theory

The view that effort depends on believing it will improve performance and lead to valued rewards.

Example: Staff work harder when a bonus target is clear and achievable.

Read in:Topic 2.2
Mathematics

Expected frequency

The predicted number of times an event will happen over many trials.

Example: A 1/4 chance in 100 trials gives expected frequency 25.

Read in:Chapter 44
AS & A Level Business

Expected monetary value

The total of each possible financial result multiplied by its probability.

Example: A 50% chance of $1,000 and 50% chance of $0 gives EMV of $500.

Read in:Topic 6.2
Computer Science

Expected result

The result that should occur for a particular test.

Example: For input 2 + 3, the expected result is 5.

Read in:Topic 7.6
AS & A Level Economics

Expenditure approach

Measuring GDP by adding spending on final goods and services produced domestically.

Example: GDP equals consumption + investment + government spending + net exports.

Read in:Chapter 6
AS & A Level Economics

Expenditure-reducing policy

A policy lowering total spending to reduce demand for imports.

Example: Higher interest rates may reduce household spending on imported goods.

Read in:Chapter 29
AS & A Level Economics

Expenditure-switching policy

A policy encouraging people to buy domestic rather than imported products.

Example: Depreciation makes imports dearer and exports cheaper.

Read in:Chapter 29
Accounting

Expense payable

An amount still owed for an expense incurred.

Example: Electricity owing at year-end is an expense payable.

Read in:Chapter 12
Computer Science

Expert system

Software that uses stored knowledge and rules to suggest decisions in a specialist field.

Example: An expert system helps identify a plant disease.

Read in:Topic 6.3
ICT

Expert system

A program that uses stored specialist knowledge and rules to offer advice.

Example: A medical expert system suggests possible conditions.

Read in:Chapter 6
Edexcel Business

Exploitation

Treating people or resources unfairly to gain an advantage.

Example: A supplier may exploit workers by paying unsafe or unfairly low wages.

Read in:Chapter 10
Mathematics

Exponent

The small raised number telling how many times a base is used as a factor.

Example: In 5³, the exponent is 3.

Read in:Chapter 3
Mathematics

Exponential decay

A decrease by the same percentage over equal time periods.

Example: A car losing 20% of its value yearly keeps 80% each year.

Read in:Chapter 17
Mathematics

Exponential growth

Growth by the same percentage over equal time periods.

Example: An amount increasing by 10% yearly is multiplied by 1.1 each year.

Read in:Chapter 17
AS & A Level Economics

Export

A good or service sold to a buyer in another country.

Example: A local firm sells clothes overseas.

Economics

Export

A good or service sold to a buyer in another country.

Example: A local firm sells clothes overseas.

Read in:Chapter 37
AS & A Level Economics

Export subsidy

Government support that reduces exporters' production costs or raises their receipts.

Example: A subsidy helps local firms sell machinery overseas at lower prices.

Read in:Chapter 12
AS & A Level Economics

Export-led growth

Economic growth driven by expanding sales to overseas markets.

Example: A country develops electronics industries to sell products abroad.

Edexcel Business

Exports

Goods or services sold to another country.

Example: A British firm exports machinery to France.

Mathematics

Expression

A mathematical combination of numbers, symbols and operations without an equals sign.

Example: 2x + 5 is an expression.

Read in:Chapter 19
AS & A Level Business

Extended marketing mix

The usual four Ps plus people, process and physical evidence for services.

Example: A hotel considers staff service, booking steps and room appearance.

Read in:Topic 3.3
ICT

Extended reality

A general term for technologies that blend or replace real-world views with digital experiences.

Example: AR and VR are both forms of XR.

Read in:Chapter 1
AS & A Level Business

Extension strategy

An action designed to keep an existing product selling for longer.

Example: A brand introduces new flavours to revive sales.

Read in:Topic 3.3
Edexcel Business

Extension strategy

A method used to extend a product's sales life.

Example: A company refreshes the packaging of an older product.

Read in:Chapter 36
Business Studies

Extension strategy

A method used to extend a product's sales life.

Example: A company refreshes the packaging of an older product.

Read in:Chapter 12
Mathematics

Exterior angle

An angle formed outside a shape when one side is extended.

Example: A triangle's exterior angle equals the sum of its two opposite interior angles.

Read in:Chapter 37
AS & A Level Business

External benefit

A benefit received by people who are not directly involved in a transaction.

Example: Vaccinating workers helps reduce infection spread to others.

Read in:Topic 6.1
Business Studies

External benefit

A benefit received by people outside a market transaction.

Example: A vaccination can help protect other people.

Read in:Chapter 28
AS & A Level Business

External communication

Sharing information with people or organisations outside the business.

Example: A retailer sends a delivery update to customers.

Read in:Topic 7.2
Edexcel Business

External communication

Messages exchanged between a business and people outside it.

Example: A company sends customers a delivery update.

Read in:Chapter 16
Business Studies

External communication

Messages exchanged between a business and people outside it.

Example: A company sends customers a delivery update.

Read in:Chapter 9
AS & A Level Business

External cost

A cost suffered by people who are not directly involved in a transaction.

Example: Local residents suffer noise from a nearby airport.

Read in:Topic 6.1
Business Studies

External cost

A cost imposed on people who are not directly buying or selling a product.

Example: Air pollution harms people living near a factory.

Read in:Chapter 28
AS & A Level Business

External customer

A person or organisation outside the business buying its product.

Example: A shopper purchasing shoes is an external customer.

Read in:Topic 9.2
AS & A Level Business

External economies of scale

Cost savings gained because the wider industry in an area grows.

Example: Nearby suppliers lower delivery costs for several factories.

Read in:Topic 9.1
Edexcel Business

External economies of scale

Cost savings a business gains because other businesses or services are nearby.

Example: A cluster of factories benefits from specialist local suppliers.

Read in:Chapter 40
Business Studies

External economies of scale

Cost savings a business gains because other businesses or services are nearby.

Example: A cluster of factories benefits from specialist local suppliers.

Read in:Chapter 21
Edexcel Business

External factors

Changes outside a business that may affect it.

Example: New laws and exchange-rate changes are external factors.

AS & A Level Business

External finance

Money obtained from sources outside the business.

Example: A company takes out a bank loan.

Read in:Topic 5.2
Business Studies

External finance

Money obtained from people or organisations outside the business.

Example: A company takes out a bank loan.

Read in:Chapter 22
AS & A Level Business

External growth

Growth achieved by joining with or buying another business.

Example: A drinks company buys a smaller competitor.

Read in:Topic 1.3
Business Studies

External growth

Growing by joining with or buying another business.

Example: A supermarket buys a smaller chain.

Read in:Chapter 3
ICT

External hard drive

A separate hard disk connected to a computer for extra storage.

Example: A student keeps backups on a USB-connected external drive.

Read in:Chapter 3
AS & A Level Business

External recruitment

Hiring someone who does not already work for the business.

Example: A firm advertises online for new engineers.

Read in:Topic 2.1
Edexcel Business

External recruitment

Hiring someone from outside the business.

Example: A company recruits a new accountant through an advert.

Read in:Chapter 18
Business Studies

External recruitment

Hiring someone from outside the business.

Example: A company recruits a new accountant through an advert.

Read in:Chapter 8
Edexcel Business

External shock

An unexpected event outside a business that affects its performance.

Example: An earthquake interrupts factory deliveries.

Read in:Chapter 9
AS & A Level Business

External stakeholder

Someone outside the business who is affected by its actions.

Example: Customers and suppliers are external stakeholders.

Read in:Topic 1.5
Accounting

External users

People outside a business who use its accounts.

Example: A supplier reviews accounts before allowing credit.

AS & A Level Economics

Externality

A cost or benefit of an activity affecting people not directly involved.

Example: Traffic noise affects nearby residents.

Economics

Externality

A cost or benefit of an activity affecting people not directly involved.

Example: Traffic noise affects nearby residents.

Read in:Chapter 14
Business Studies

Externality

A cost or benefit of an activity affecting people outside the transaction.

Example: Smoke from a factory affects nearby residents.

Read in:Chapter 28
ICT

Extranet

A private online system that gives selected outsiders controlled access.

Example: A supplier logs in to a company's extranet.

Read in:Chapter 10
Computer Science

Extreme test data

Valid values at the limits of an allowed range.

Example: If 0–100 is valid, both 0 and 100 are extreme valid tests.

Read in:Topic 7.6
ICT

Extreme test data

Valid data exactly at a permitted boundary.

Example: Age 11 is an extreme value for an 11–18 range.

Read in:Chapter 7
ICT

Eyestrain

Discomfort caused by using the eyes for too long without rest.

Example: A student may get tired eyes after hours staring at a screen.

Read in:Chapter 5

F Dictionary terms

Edexcel Business

Face-to-face communication

Speaking directly with someone in person.

Example: A supervisor explains a safety procedure to staff.

Read in:Chapter 16
Mathematics

Factor

A number that divides another whole number without a remainder.

Example: 3 is a factor of 12.

Read in:Chapter 1
AS & A Level Business

Factoring

Selling customer invoices to obtain cash earlier, usually for a fee.

Example: A manufacturer sells invoices instead of waiting 60 days.

Read in:Topic 5.3
Mathematics

Factorise

Rewrite an expression as a product of factors.

Example: 6x + 9 = 3(2x + 3).

AS & A Level Business

Factors of production

The resources used to produce goods and services: land, labour, capital and enterprise.

Example: A farm uses land, workers, machinery and the owner's ideas.

Read in:Topic 1.1
AS & A Level Economics

Factors of production

The land, labour, capital and enterprise used to produce goods and services.

Example: A bakery needs flour, bakers, ovens and someone to organise them.

Economics

Factors of production

The land, labour, capital and enterprise used to produce goods and services.

Example: A bakery needs flour, bakers, ovens and someone to organise them.

Edexcel Business

Factors of production

The resources used to make goods and provide services: land, labour, capital and enterprise.

Example: A bakery needs workers, ovens, ingredients and an owner.

Business Studies

Factors of production

The resources used to make goods and provide services: land, labour, capital and enterprise.

Example: A bakery needs workers, ovens, ingredients and an owner.

Read in:Chapter 1
Accounting

Factory overheads

Production costs that cannot easily be traced to one product.

Example: Factory lighting and the factory supervisor's salary are overheads.

Read in:Chapter 19
Accounting

Faithful representation

Financial information showing what actually happened as completely and accurately as reasonably possible.

Example: A loan is reported as a liability, not as sales income.

Read in:Chapter 27
AS & A Level Business

Family business

A business mainly owned or controlled by members of one family.

Example: Parents and children manage a family bakery.

Read in:Topic 1.3
AS & A Level Business

Favourable variance

A difference that improves the business's position compared with the budget.

Example: Sales revenue is $2,000 higher than budgeted.

Read in:Topic 5.5
AS & A Level Business

Fayol's principles of management

Ideas about how organisations should be managed, including clear authority and division of work.

Example: A manager uses unity of command so each worker has one direct supervisor.

Read in:Topic 2.3
AS & A Level Business

Feedback

A response showing whether a message was received or understood.

Example: A customer confirms the delivery instructions.

Read in:Topic 7.2
Computer Science

Feedback

Information returned about a system's output so it can adjust its behaviour.

Example: A heating controller measures the room after switching on.

Read in:Topic 6.1
Edexcel Business

Feedback

A response that shows whether a message was received and understood.

Example: An employee asks a question after receiving instructions.

Business Studies

Feedback

A response that shows whether a message was received and understood.

Example: An employee asks a question after receiving instructions.

Read in:Chapter 9
Computer Science

Fetch-decode-execute cycle

The repeated steps a processor uses to run instructions.

Example: The CPU fetches an instruction, understands it, then carries it out.

Read in:Topic 3.1
Computer Science

Field

One type of data stored for each record.

Example: DateOfBirth is a field in a student table.

Read in:Topic 9.1
Computer Science

File

A named collection of information stored on a device.

Example: scores.txt is a file holding scores.

Read in:Topic 8.3
Computer Science

File handling

Opening, reading, writing and closing files in a program.

Example: A program saves students' scores to a file.

Read in:Topic 8.3
Computer Science

File path

The location of a file in a computer's folder structure.

Example: /home/student/scores.txt is a file path.

Read in:Topic 8.3
Computer Science

File size

The amount of storage space a file uses.

Example: A high-resolution picture often has a larger file size.

Read in:Topic 1.3
ICT

File structure

The way records and fields are organised in a file.

Example: A student file contains ID, name and class fields.

Read in:Chapter 7
Edexcel Business

Finance costs

Expenses of borrowing money, such as loan interest.

Example: A company pays interest on a bank loan.

Read in:Chapter 29
Edexcel Business

Finance department

The team responsible for a business's financial records, payments and planning.

Example: Finance staff prepare budgets and pay suppliers.

Read in:Chapter 24
AS & A Level Economics

Financial account

The balance-of-payments account recording cross-border investment and financial asset flows.

Example: A foreign investor buying domestic shares creates a financial-account entry.

AS & A Level Economics

Financial contagion

The spread of financial shocks from one market or country to others.

Example: A banking crisis overseas causes investors to withdraw from several economies.

Read in:Chapter 32
Accounting

Financial data

Information about money received, money spent, assets and debts.

Example: A sales record showing $800 received is financial data.

Read in:Chapter 1
Edexcel Business

Financial documents

Records used to understand financial performance and position.

Example: A manager studies an income statement before reducing costs.

Read in:Chapter 32
Edexcel Business

Financial economies

Lower borrowing costs available to some larger, lower-risk firms.

Example: A large company negotiates a lower interest rate on loans.

Read in:Chapter 40
Accounting

Financial information

Figures and reports used to make business decisions.

Example: A monthly profit report helps a manager plan.

Read in:Chapter 1
AS & A Level Business

Financial leverage

Using debt to finance activity, which can increase both returns and risk.

Example: Borrowing helps fund growth but increases interest obligations.

Read in:Topic 10.4
Edexcel Business

Financial management

Planning and controlling how a business obtains and uses money.

Example: A manager prepares budgets and monitors cash balances.

Read in:Chapter 15
ICT

Financial model

A spreadsheet-based model used to predict financial outcomes.

Example: A shop changes its sales forecast to estimate profit.

Read in:Chapter 6
Edexcel Business

Financial motivation

Encouraging employees by giving monetary rewards.

Example: A sales team earns bonuses for meeting targets.

Read in:Chapter 22
Edexcel Business

Financial objectives

Goals measured in monetary terms, such as revenue and profit.

Example: A retailer sets a target of £20,000 annual profit.

Read in:Chapter 2
Accounting

Financial performance

How successfully a business has earned income and managed costs.

Example: An income statement helps users judge performance.

Read in:Chapter 24
AS & A Level Business

Financial performance

How well a business uses money to earn profit and meet financial goals.

Example: A company tracks profit margins and cash flows each year.

Read in:Topic 10.4
Edexcel Business

Financial performance

How well a business uses money to earn profit and meet financial goals.

Example: A company tracks profit margins and cash flows each year.

Read in:Chapter 31
Accounting

Financial position

What a business owns and owes at a particular date.

Example: The statement of financial position reports assets and liabilities.

Read in:Chapter 24
Edexcel Business

Financial security

Having enough money and financial stability to meet obligations.

Example: A small business keeps savings for unexpected bills.

Read in:Chapter 2
Accounting

Financial statement limitation

A reason accounts may not show the whole picture of a business.

Example: Accounts may not reflect staff skills or customer loyalty.

Read in:Chapter 25
AS & A Level Business

Financial statements

Reports showing a business's financial performance and position.

Example: A company publishes profit and financial-position statements.

Read in:Topic 10.1
Edexcel Business

Financial statements

Reports showing a business's financial performance and position.

Example: A company publishes profit and financial-position statements.

Read in:Chapter 32
AS & A Level Business

Financial strategy

A long-term plan for financing a business and using its financial resources.

Example: A growing firm decides how much to borrow and reinvest.

Read in:Topic 10.4
Accounting

Financial transaction

A business activity that can be measured in money and recorded.

Example: Buying supplies for $90 is a financial transaction.

Accounting

Financial year-end

The final date of a business's accounting year.

Example: One firm closes its accounts on 31 March, another on 31 December.

Read in:Chapter 23
AS & A Level Business

Finished goods

Completed products ready to be sold.

Example: Boxed smartphones in a warehouse are finished goods.

Read in:Topic 4.2
Computer Science

Firewall

Hardware or software that filters network traffic according to security rules.

Example: A firewall blocks unwanted incoming connections.

Read in:Topic 5.3
ICT

Firewall

A security tool that controls network traffic using rules.

Example: A firewall blocks an unwanted incoming connection.

Read in:Chapter 8
AS & A Level Economics

Firm

A business organisation that produces or sells goods and services.

Example: A bakery is a firm.

Economics

Firm

A business organisation that produces or sells goods and services.

Example: A bakery is a firm.

Read in:Chapter 20
Computer Science

Firmware

Software stored in a device to control its basic operations.

Example: A router uses firmware to start up and manage its hardware.

Read in:Topic 4.1
AS & A Level Business

Fiscal policy

Government decisions about taxation and public spending.

Example: The government cuts income tax to encourage spending.

Read in:Topic 6.1
AS & A Level Economics

Fiscal policy

Government decisions about taxes and spending used to influence the economy.

Example: The government increases spending during a recession.

Economics

Fiscal policy

Government decisions about taxes and spending used to influence the economy.

Example: The government increases spending during a recession.

Read in:Chapter 26
Edexcel Business

Fiscal policy

Government changes to taxation and spending intended to influence the economy.

Example: A government raises spending to support demand.

Read in:Chapter 12
Business Studies

Fiscal policy

Government changes to taxation and spending intended to influence the economy.

Example: A government raises spending to support demand.

Read in:Chapter 27
Edexcel Business

Fixed assets

Long-lasting resources used by a business, such as buildings and machinery.

Example: A delivery van is a fixed asset of a courier company.

Read in:Chapter 15
AS & A Level Business

Fixed budget

A budget prepared for one expected level of activity and not changed later.

Example: A department keeps its original annual spending target.

Read in:Topic 5.5
Accounting

Fixed capital account

An account that normally keeps a partner's invested capital unchanged except for agreed changes.

Example: A partner's initial $8,000 stays in their fixed capital account.

Read in:Chapter 16
AS & A Level Business

Fixed cost

A cost that does not change with output in the short run.

Example: Monthly warehouse rent stays at $2,000.

Read in:Topic 5.4
AS & A Level Economics

Fixed cost

A business cost that does not change with output in the short run.

Example: A shop pays the same monthly rent even if sales fall.

Read in:Chapter 17
Economics

Fixed cost

A business cost that does not change with output in the short run.

Example: A shop pays the same monthly rent even if sales fall.

Read in:Chapter 22
Edexcel Business

Fixed cost

A cost that does not change with output in the short run.

Example: Monthly warehouse rent stays at $2,000.

Read in:Chapter 27
Edexcel Business

Fixed costs

Costs that do not change with output in the short run.

Example: Factory rent stays the same even if production falls.

Read in:Chapter 28
Business Studies

Fixed costs

Costs that do not change with output in the short run.

Example: Factory rent stays the same even if production falls.

Read in:Chapter 19
AS & A Level Economics

Fixed exchange rate

An exchange rate kept near a target through government or central-bank action.

Example: A central bank buys or sells currency to defend its target.

Read in:Chapter 29
Economics

Fixed exchange rate

An exchange rate kept near a target through government or central-bank action.

Example: A central bank buys or sells currency to defend its target.

Read in:Chapter 38
AS & A Level Business

Fixed overhead

A cost that remains largely unchanged as output changes in the short run.

Example: Factory rent stays the same during a quiet month.

Read in:Topic 4.3
ICT

Flash memory

Non-volatile electronic memory that can be erased and rewritten.

Example: A memory card uses flash memory.

Read in:Chapter 3
Edexcel Business

Flat structure

An organisation with few management levels.

Example: A small start-up may have only workers and one manager.

Read in:Chapter 23
Business Studies

Flat structure

An organisation with few management levels.

Example: A small start-up may have only workers and one manager.

Read in:Chapter 7
AS & A Level Business

Flexible budget

A budget adjusted for the actual level of activity.

Example: A factory revises material spending after producing more units.

Read in:Topic 5.5
Edexcel Business

Flexible manufacturing

Using equipment and production methods that can switch between products efficiently.

Example: A factory changes from one model of appliance to another quickly.

Read in:Chapter 43
AS & A Level Business

Flexible working

Arrangements that vary when, where or how people work.

Example: An employee works compressed hours four days a week.

Read in:Topic 7.4
AS & A Level Business

Flexitime

An arrangement allowing staff to vary their start and finish times within rules.

Example: An employee starts at 8 am rather than 9 am.

Read in:Topic 7.4
AS & A Level Economics

Floating exchange rate

An exchange rate mainly determined by market demand and supply.

Example: The currency rises when more foreign buyers demand it.

Read in:Chapter 13
Economics

Floating exchange rate

An exchange rate mainly determined by market demand and supply.

Example: The currency rises when more foreign buyers demand it.

Read in:Chapter 38
ICT

Floating gate

A part of flash memory used to store an electrical charge representing data.

Example: A flash memory cell holds its data when the power is off.

Read in:Chapter 3
AS & A Level Business

Flow production

Making standardised products continuously along a production line.

Example: A factory produces bottled drinks on a conveyor belt.

Read in:Topic 4.1
Edexcel Business

Flow production

Making large quantities of standard products in a continuous process.

Example: A bottling line fills drinks throughout the day.

Read in:Chapter 41
Business Studies

Flow production

Making large quantities of standard products in a continuous process.

Example: A bottling line fills drinks throughout the day.

Read in:Chapter 18
Mathematics

Flow rate

The amount of liquid or gas passing a point each unit of time.

Example: A tap delivers 3 litres per minute.

Read in:Chapter 12
Computer Science

Flowchart

A diagram using symbols and arrows to show the steps in a process.

Example: A diamond shows a decision in a flowchart.

Accounting

Fluctuating capital account

A capital account that changes with profit shares, drawings and other entries.

Example: A partner's capital increases after their share of profit is added.

Read in:Chapter 16
Business Studies

Fluctuation

A change that moves up and down over time.

Example: Daily sales fluctuate between busy and quiet days.

Read in:
AS & A Level Business

Focus group

A small group discussing a product or idea with a researcher.

Example: Eight customers discuss a new phone design.

Read in:Topic 3.2
Edexcel Business

Focus group

A small group of people discussing a product or idea with a researcher.

Example: Eight shoppers share opinions about a new cereal box.

Read in:Chapter 33
Business Studies

Focus group

A small group of people discussing a product or idea with a researcher.

Example: Eight shoppers share opinions about a new cereal box.

Read in:Chapter 11
Edexcel Business

Footfall

The number of people passing or entering a shop or location.

Example: A shopping-centre unit has high footfall on Saturdays.

Read in:Chapter 8
Computer Science

For loop

A loop usually used when the number of repetitions is known.

Example: FOR i ← 1 TO 10 repeats a task ten times.

Read in:Topic 8.1
AS & A Level Business

Force field analysis

Comparing pressures that support and oppose a proposed change.

Example: Managers weigh staff support against training costs.

Read in:Topic 6.2
AS & A Level Business

Forecasting uncertainty

The risk that predictions differ from what actually happens.

Example: A forecast assumes sales rise, but orders may fall.

Read in:Topic 5.3
Economics

Foreign aid

Money, goods or expertise provided to support another country's development.

Example: A grant funds a water purification project.

Read in:Chapter 35
AS & A Level Economics

Foreign direct investment

Investment giving a foreign business a lasting management interest in domestic operations.

Example: An overseas company builds and runs a factory in another country.

Economics

Foreign direct investment

Investment by a business in productive assets or operations in another country.

Example: A company builds a new factory abroad.

Edexcel Business

Foreign direct investment

Investment by a business in productive assets or operations in another country.

Example: A company builds a new factory abroad.

Read in:Chapter 10
AS & A Level Economics

Foreign exchange market

Where currencies are bought and sold.

Example: Banks and firms exchange dollars for euros.

Read in:Chapter 4
Economics

Foreign exchange market

Where currencies are bought and sold.

Example: Banks and firms exchange dollars for euros.

Read in:Chapter 38
Business Studies

Foreign markets

Customers and businesses in countries outside the firm's home country.

Example: A local clothing brand starts selling its products overseas.

AS & A Level Business

Formal communication

Messages sent through recognised official channels.

Example: An official memo explains a policy change.

Read in:Topic 7.2
Edexcel Business

Formal communication

Official messages sent through recognised business channels.

Example: A company sends a written policy to staff.

Read in:Chapter 16
Business Studies

Formal communication

Official messages sent through recognised business channels.

Example: A company sends a written policy to staff.

Read in:Chapter 9
Computer Science

Format check

Checking that data follows a specified pattern.

Example: A date must be entered as DD/MM/YYYY.

Read in:Topic 7.5
ICT

Format check

A validation rule checking the pattern of entered data.

Example: A postcode must follow a specified pattern.

Read in:Chapter 7
Mathematics

Formula

A rule showing how quantities are related using symbols.

Example: Area of a rectangle = length × width.

Read in:Chapter 19
Mathematics

Fraction key

A calculator button used to type numerator and denominator directly.

Example: Enter 3 over 4 with the fraction key.

Read in:Chapter 14
Mathematics

Fractional index

A power that represents a root, possibly followed by another power.

Example: 9^(1/2) = 3.

Read in:Chapter 22
AS & A Level Economics

Fractional-reserve banking

A system in which banks keep only part of deposits as reserves and lend the remainder.

Example: A bank retains some deposits and uses the rest to finance loans.

Read in:Chapter 27
AS & A Level Business

Franchise

A business arrangement allowing someone to trade using another company's brand and system.

Example: A franchisee opens a branded fast-food outlet.

Read in:Topic 1.2
Edexcel Business

Franchise

An arrangement where someone pays to operate a business using another firm's brand and system.

Example: A restaurant owner operates under a well-known chain's name.

Business Studies

Franchise

An arrangement where someone pays to operate a business using another firm's brand and system.

Example: A restaurant owner operates under a well-known chain's name.

Read in:Chapter 4
Edexcel Business

Franchisee

The person or business paying to operate under a franchisor's brand.

Example: An entrepreneur pays fees to open a branded coffee shop.

Read in:Chapter 3
Edexcel Business

Franchisor

A business that grants another operator the right to use its brand and business system.

Example: A restaurant chain allows franchisees to open branded outlets.

Read in:Chapter 3
AS & A Level Economics

Free good

A good available in sufficient amounts at no opportunity cost in the situation considered.

Example: Sunlight is generally a free good for someone sitting outdoors.

Read in:Chapter 1
AS & A Level Economics

Free trade

Trade between countries with few government restrictions.

Example: Countries remove tariffs on imported clothes.

Economics

Free trade

Trade between countries with few government restrictions.

Example: Countries remove tariffs on imported clothes.

Read in:Chapter 37
Edexcel Business

Free trade

Trade between countries with few restrictions such as tariffs or quotas.

Example: Two countries reduce import taxes on each other's products.

Read in:Chapter 9
Business Studies

Free trade

Trade between countries with few restrictions such as tariffs or quotas.

Example: Two countries reduce import taxes on each other's products.

Read in:Chapter 29
AS & A Level Economics

Free trade area

A group of countries removing tariffs on trade between members while setting their own external tariffs.

Example: Members trade freely internally but use different tariffs on outside imports.

Read in:Chapter 32
AS & A Level Economics

Free-rider problem

When people can benefit from something without paying, discouraging private provision.

Example: People benefit from street lighting even if they do not contribute to its cost.

Mathematics

Frequency density

Frequency divided by class width; used for histogram height.

Example: A class with frequency 20 and width 5 has density 4.

Read in:Chapter 46
Mathematics

Frequency table

A table showing how many times each value or group occurs.

Example: A table may show 7 pupils have two siblings.

Read in:Chapter 45
AS & A Level Economics

Frictional unemployment

Short-term unemployment while people move between jobs.

Example: A worker leaves one job and searches for another.

Economics

Frictional unemployment

Short-term unemployment while people move between jobs.

Example: A worker leaves one job and searches for another.

Read in:Chapter 30
Edexcel Business

Fringe benefits

Rewards in addition to normal pay, such as health insurance or a company car.

Example: A manager receives free medical insurance.

Read in:Chapter 22
Business Studies

Fringe benefits

Rewards in addition to normal pay, such as health insurance or a company car.

Example: A manager receives free medical insurance.

Read in:Chapter 6
ICT

FTP

A protocol used to transfer files between computers.

Example: A developer uses FTP to upload site files.

Read in:Chapter 10
AS & A Level Business

Full costing

A method that allocates both direct costs and a share of overheads to products.

Example: A manufacturer adds factory rent to product cost estimates.

Read in:Topic 5.4
AS & A Level Economics

Full employment

A situation where nearly everyone willing and able to work at the going wage can find work.

Example: An economy has very little unemployment caused by weak demand.

Economics

Full employment

A situation where nearly everyone willing and able to work at the going wage can find work.

Example: An economy has very little unemployment caused by weak demand.

Computer Science

Full-duplex

Communication in both directions at the same time.

Example: Both people can speak during a telephone call.

Read in:Topic 2.1
Edexcel Business

Full-time employment

Employment involving the standard working hours for a full-time position.

Example: A manager works a regular five-day week.

Read in:Chapter 18
Computer Science

Function

A named subroutine that returns a result.

Example: A function returns the area of a rectangle.

Read in:Topic 7.9
Mathematics

Function

A rule that assigns exactly one output to each allowed input.

Example: f(x) = 2x gives output 6 when x = 3.

Read in:Chapter 30
Mathematics

Function graph

A graph showing the output value of a function for each input.

Example: The graph of y = x² is a parabola.

Read in:Chapter 28
Mathematics

Function notation

Using a name such as f(x) to show a function's output.

Example: f(5) means the output when x = 5.

Read in:Chapter 30
Edexcel Business

Funding decisions

Choices about how to obtain and use money for business activities.

Example: A firm compares a bank loan with issuing shares.

Read in:Chapter 32

G Dictionary terms

AS & A Level Economics

Gains from trade

Extra consumption or output possibilities made possible by exchanging goods.

Example: Two countries specialise and both consume more than they could alone.

Read in:Chapter 12
AS & A Level Economics

Game theory

A way of analysing decisions when each participant's outcome depends on others' choices.

Example: Two airlines decide whether to lower fares based on expected rival behaviour.

Read in:Chapter 19
AS & A Level Economics

GDP per head

GDP divided by a country's population.

Example: A GDP of $1 billion shared among 100,000 people gives $10,000 per head.

Read in:Chapter 8
Economics

GDP per head

GDP divided by a country's population.

Example: A GDP of $1 billion shared among 100,000 people gives $10,000 per head.

Read in:Chapter 29
AS & A Level Business

Gearing

The extent to which a business relies on long-term borrowed finance.

Example: Taking on more debt can increase gearing.

Read in:Topic 10.4
Business Studies

Gearing

How much of a business's long-term finance comes from borrowing rather than owners' funds.

Example: A highly geared company depends heavily on loans.

Read in:Chapter 22
AS & A Level Business

Gearing ratio

A measure of how much long-term finance comes from debt compared with capital employed or equity, depending on the formula used.

Example: A business with high long-term borrowing has high gearing.

Read in:Topic 10.2
Edexcel Business

Gender discrimination

Unfair treatment of someone because of their gender.

Example: A capable applicant is rejected solely because she is a woman.

Read in:Chapter 19
AS & A Level Economics

Gender Inequality Index

A measure comparing disadvantages faced by women and men in key areas.

Example: Unequal representation and educational outcomes affect the GII.

Read in:Chapter 30
Edexcel Business

Genetic modification

Changing an organism's genetic material to give it particular characteristics.

Example: Researchers develop crops resistant to some pests.

Read in:Chapter 43
ICT

Geographic information system

Software that combines location data with maps for analysis.

Example: A planner uses GIS to map flood risk.

Read in:Chapter 6
Edexcel Business

Geographic segmentation

Dividing a market according to customers' locations.

Example: A company sells winter clothing in colder regions.

Read in:Chapter 35
AS & A Level Economics

Geographical mobility

How easily people or resources can move between places.

Example: A worker moves to another town for a new job.

Read in:Chapter 23
Economics

Geographical mobility

How easily people or resources can move between places.

Example: A worker moves to another town for a new job.

Read in:Chapter 2
Mathematics

Geometric sequence

A sequence where each term is made by multiplying by the same number.

Example: 2, 6, 18, 54 multiplies by 3 each time.

Read in:Chapter 25
AS & A Level Economics

Giffen good

A rare inferior good whose demand rises when its own price rises because the income effect outweighs substitution.

Example: For a very poor household, dearer staple food might lead to buying more of it.

AS & A Level Business

Gig economy

A labour market where people often work on short jobs or tasks rather than permanent contracts.

Example: A delivery rider accepts jobs through an app.

Read in:Topic 7.4
Computer Science

Gigabyte

A unit of data storage equal to one billion bytes in decimal notation.

Example: A tablet might have 128 GB of storage.

Read in:Topic 1.3
AS & A Level Economics

Gini coefficient

A number measuring income inequality, with 0 meaning complete equality and 1 meaning maximum inequality.

Example: A Gini coefficient of 0.25 indicates less inequality than 0.50.

ICT

Global positioning system

A satellite-based system that estimates a receiver's location.

Example: A phone uses GPS to show your position on a map.

Read in:Chapter 6
Edexcel Business

Global warming

The long-term rise in Earth's average temperature, largely caused by greenhouse gases.

Example: Higher temperatures raise the risk of extreme heat.

Read in:Chapter 13
AS & A Level Business

Globalisation

Growing links between countries through trade, investment and information.

Example: A retailer sources materials internationally and sells worldwide.

Read in:Topic 6.1
AS & A Level Economics

Globalisation

Countries becoming more connected through trade, investment, technology and movement of people.

Example: A phone is designed in one country and assembled in another.

Read in:Chapter 32
Economics

Globalisation

Countries becoming more connected through trade, investment, technology and movement of people.

Example: A phone is designed in one country and assembled in another.

Read in:Chapter 37
Edexcel Business

Globalisation

Countries and businesses becoming more connected through trade, investment and technology.

Example: A phone is designed in one country and assembled in another.

Business Studies

Globalisation

Countries and businesses becoming more connected through trade, investment and technology.

Example: A phone is designed in one country and assembled in another.

Economics

Go-slow

When employees deliberately work more slowly as a form of protest.

Example: Factory workers reduce the speed of production.

Read in:Chapter 19
Accounting

Going concern principle

The assumption that a business will continue operating for the foreseeable future.

Example: Equipment is normally valued for continued use rather than forced sale.

Read in:Chapter 26
AS & A Level Economics

Goods

Physical products that people can use or buy.

Example: Shoes and textbooks are goods.

Economics

Goods

Physical products that people can use or buy.

Example: Shoes and textbooks are goods.

Read in:Chapter 1
Edexcel Business

Goods

Physical products that customers can touch.

Example: Shoes and bicycles are goods.

Business Studies

Goods

Physical products that customers can touch.

Example: Shoes and bicycles are goods.

Accounting

Goods for own use

Items taken from trading stock by the owner for personal use.

Example: A shop owner takes $30 of goods home.

Read in:Chapter 15
AS & A Level Economics

Government

The public authority that makes and enforces rules and provides services.

Example: Government funds schools and builds roads.

Economics

Government

The public authority that makes and enforces rules and provides services.

Example: Government funds schools and builds roads.

Read in:Chapter 24
AS & A Level Economics

Government budget

A plan showing expected government revenue and spending.

Example: A budget sets funding for schools and hospitals.

Read in:Chapter 11
Economics

Government budget

A plan showing expected government revenue and spending.

Example: A budget sets funding for schools and hospitals.

Read in:Chapter 26
AS & A Level Economics

Government failure

When intervention produces a less efficient or less desirable outcome than intended.

Example: An overly generous subsidy encourages wasteful production.

Business Studies

Government grant

Money provided by government for a particular purpose, usually without repayment.

Example: A business receives funding to open in a disadvantaged area.

Edexcel Business

Government incentives

Benefits offered by a government to encourage particular business activities.

Example: A company receives a tax reduction for opening in a rural area.

Read in:Chapter 8
AS & A Level Economics

Government intervention

Action by the state to influence economic activity.

Example: A government taxes pollution to discourage it.

Read in:Chapter 5
Economics

Government intervention

Action by the state to influence economic activity.

Example: A government taxes pollution to discourage it.

Read in:Chapter 15
Edexcel Business

Government objectives

The economic and social goals a government wants to achieve.

Example: A government seeks lower unemployment and stable prices.

Read in:Chapter 12
Edexcel Business

Government subsidy

Money paid by government to support a business, industry or activity.

Example: A government helps farmers pay for equipment.

Read in:Chapter 5
Accounting

Government taxation

Taxes collected by the government using information about business income and profits.

Example: A tax office reviews reported profit.

Read in:Chapter 24
Mathematics

Gradient

How steep a graph is, calculated as vertical change divided by horizontal change.

Example: On a distance-time graph, gradient gives speed along a straight segment.

AS & A Level Business

Grapevine communication

Unofficial news or rumours spreading among employees.

Example: Staff hear about a proposed reorganisation from colleagues.

Read in:Topic 7.2
ICT

Graphical user interface

A way to control a computer using windows, icons and menus.

Example: A user clicks a folder icon to open files.

Read in:Chapter 1
AS & A Level Economics

Green growth

Economic development that reduces environmental harm and uses resources efficiently.

Example: Investing in clean energy creates jobs while cutting emissions.

Read in:Chapter 25
Edexcel Business

Grievance procedure

A formal process for employees to raise and resolve workplace complaints.

Example: A worker reports unfair treatment through the grievance procedure.

Read in:Chapter 24
AS & A Level Economics

Gross domestic product

The value of final goods and services produced within a country during a given period.

Example: A country's annual GDP measures the value of what it produces.

Read in:Chapter 6
Economics

Gross domestic product

The value of final goods and services produced within a country during a given period.

Example: A country's annual GDP measures the value of what it produces.

Read in:Chapter 29
Business Studies

Gross domestic product

The total value of final goods and services produced in a country during a period.

Example: A rise in GDP often indicates the economy is growing.

Read in:Chapter 27
Accounting

Gross margin

Gross profit divided by revenue, multiplied by 100.

Example: $3,000 gross profit on $10,000 sales gives 30% gross margin.

AS & A Level Economics

Gross national income

GDP plus net primary income received from overseas.

Example: Income residents earn abroad can raise GNI above GDP.

Read in:Chapter 6
Accounting

Gross profit

Sales revenue minus the cost of goods sold.

Example: Sales of $2,000 less cost of sales of $1,200 gives $800 gross profit.

Read in:Chapter 15
AS & A Level Business

Gross profit

Revenue minus the cost of goods sold.

Example: Sales of $50,000 less cost of sales of $30,000 gives $20,000.

Read in:Topic 10.1
Edexcel Business

Gross profit

Revenue minus cost of sales.

Example: Revenue of $1,000 less cost of sales of $600 gives $400 gross profit.

Read in:Chapter 29
Business Studies

Gross profit

Revenue minus cost of sales.

Example: Revenue of $1,000 less cost of sales of $600 gives $400 gross profit.

AS & A Level Business

Gross profit margin

Gross profit as a percentage of revenue.

Example: A $30,000 gross profit on $100,000 revenue gives 30%.

Read in:Topic 10.2
Edexcel Business

Gross profit margin

Gross profit expressed as a percentage of revenue.

Example: $300 gross profit on $1,000 revenue means a 30% margin.

Business Studies

Gross profit margin

Gross profit expressed as a percentage of revenue.

Example: $300 gross profit on $1,000 revenue means a 30% margin.

Read in:Chapter 26
Edexcel Business

Growth

An increase in the size or sales of a business.

Example: A company opens three new shops.

Business Studies

Growth

An increase in the size or sales of a business.

Example: A company opens three new shops.

Mathematics

Growth factor

The number multiplied each period during percentage growth.

Example: 5% yearly growth uses the factor 1.05.

Read in:Chapter 17

H Dictionary terms

Edexcel Business

Habitat destruction

Damage to natural places where plants and animals live.

Example: Clearing forests for a factory may destroy wildlife habitats.

Read in:Chapter 13
ICT

Hacking

Accessing or interfering with a computer system without permission.

Example: An attacker breaks into an account using a stolen password.

Read in:Chapter 8
Computer Science

Half-duplex

Communication in both directions, but not at the same time.

Example: People using a walkie-talkie take turns speaking.

Read in:Topic 2.1
Computer Science

Hard disk drive

A storage device with spinning magnetic platters.

Example: An HDD can hold large video files.

Read in:Topic 3.3
ICT

Hard disk drive

A storage device with spinning magnetic platters.

Example: A desktop computer may store videos on an HDD.

Read in:Chapter 3
AS & A Level Business

Hard human resource management

An approach that treats labour mainly as a cost and focuses on tight control and performance.

Example: A firm closely monitors staffing costs and output targets.

Read in:Topic 7.4
ICT

Hardware

The physical parts of a computer that you can touch.

Example: A keyboard and motherboard are hardware.

Read in:Chapter 1
Edexcel Business

Health and safety

Measures for protecting people from injuries and risks at work.

Example: A factory provides protective clothing and safety training.

Read in:Chapter 19
AS & A Level Economics

Healthcare

Services that prevent and treat illness and injury.

Example: Vaccination programmes help children stay healthy.

Economics

Healthcare

Services that prevent and treat illness and injury.

Example: Vaccination programmes help children stay healthy.

Read in:Chapter 35
Business Studies

Herzberg's theory

A theory that separates factors causing satisfaction from factors preventing dissatisfaction.

Example: Responsibility can motivate, while poor working conditions can cause dissatisfaction.

Read in:Chapter 6
Computer Science

Hexadecimal

A number system with 16 symbols: 0–9 and A–F.

Example: The binary value 1111 is F in hexadecimal.

Read in:Topic 1.1
AS & A Level Business

Hierarchy

The levels of authority from senior leaders to junior employees.

Example: A company has a chief executive, managers and supervisors.

Read in:Topic 7.1
Edexcel Business

Hierarchy

The levels of authority from senior leaders to junior employees.

Example: A company has a chief executive, managers and supervisors.

Computer Science

High-level language

A programming language designed to be relatively easy for people to read.

Example: Python is a high-level language.

Read in:Topic 4.2
AS & A Level Business

Hire purchase

Buying an asset through instalments, with ownership normally passing after the final payment.

Example: A firm pays monthly for a delivery truck.

Read in:Topic 5.2
Edexcel Business

Hire purchase

Buying an asset through instalments, with ownership normally passing after the final payment.

Example: A firm pays monthly for a delivery truck.

Read in:Chapter 25
Mathematics

Histogram

A graph showing continuous grouped data with bar areas proportional to frequency.

Example: With unequal class widths, histogram bar heights show frequency density.

Read in:Chapter 46
Accounting

Historic cost

Recording an asset at its original purchase cost rather than its current market price.

Example: A building bought for $70,000 may remain based on that cost.

ICT

Hologram

A special optical label sometimes used to help identify genuine products.

Example: A software package has a security hologram.

Read in:Chapter 9
AS & A Level Business

Horizontal communication

Messages exchanged between people or departments at similar levels.

Example: Two team leaders coordinate deliveries.

Read in:Topic 7.2
Edexcel Business

Horizontal communication

Information exchanged between people at similar organisational levels.

Example: Two department heads coordinate a product launch.

Read in:Chapter 16
AS & A Level Business

Horizontal integration

Combining with a business at the same production stage in the same industry.

Example: One supermarket chain buys another.

Read in:Topic 1.3
Business Studies

Horizontal integration

When a business joins with another at the same stage of production in the same industry.

Example: One bakery chain buys another bakery chain.

Read in:Chapter 3
AS & A Level Economics

Horizontal merger

A merger between firms operating at the same production stage.

Example: Two competing supermarkets combine.

Read in:Chapter 20
Business Studies

Host country

The country where a foreign business operates or invests.

Example: A factory built by an overseas company creates jobs in the host country.

Read in:Chapter 29
AS & A Level Economics

Household

A person or group sharing spending and economic decisions.

Example: A family decides how much income to save.

Economics

Household

A person or group sharing spending and economic decisions.

Example: A family decides how much income to save.

Read in:Chapter 17
Economics

Household borrowing

Taking a loan or credit that must be repaid later.

Example: A family borrows money to buy a car.

Read in:Chapter 17
AS & A Level Economics

Household income

The money a household receives from earnings and other sources.

Example: A pay rise increases a family’s household income.

Read in:Chapter 22
Economics

Household income

The money a household receives from earnings and other sources.

Example: A pay rise increases a family’s household income.

Read in:Chapter 10
AS & A Level Economics

Household saving

The part of a household’s income that it does not spend now.

Example: A family sets aside money for emergencies.

Read in:Chapter 27
Economics

Household saving

The part of a household’s income that it does not spend now.

Example: A family sets aside money for emergencies.

Read in:Chapter 17
AS & A Level Economics

Household spending

Money used by a household to buy goods and services.

Example: A family pays for food, transport and electricity.

Read in:Chapter 10
Economics

Household spending

Money used by a household to buy goods and services.

Example: A family pays for food, transport and electricity.

Read in:Chapter 17
ICT

HTTP

A protocol used to request and transfer web pages.

Example: A browser requests a web page using HTTP.

Read in:Chapter 10
Computer Science

HTTPS

HTTP protected by encryption and authentication using TLS.

Example: The padlock on an HTTPS site shows that the connection is encrypted.

Read in:Topic 5.1
ICT

HTTPS

A secure form of HTTP that uses encryption to protect data in transit.

Example: A login page uses HTTPS.

Read in:Chapter 10
ICT

Hub

A network device that sends incoming data to all its connected ports.

Example: Every computer connected to a hub receives the same transmitted data.

Read in:Chapter 4
AS & A Level Economics

Human capital

Workers' knowledge, skills, health and experience.

Example: Training nurses raises the quality of human capital.

Economics

Human capital

Workers' knowledge, skills, health and experience.

Example: Training nurses raises the quality of human capital.

Edexcel Business

Human capital

Workers' knowledge, skills, health and experience.

Example: Training nurses raises the quality of human capital.

Read in:Chapter 10
AS & A Level Economics

Human capital formation

Building workers' knowledge and skills through education or training.

Example: Technical training helps workers use new production equipment.

Read in:Chapter 8
AS & A Level Economics

Human development

Improvement in people's health, education, opportunities and living conditions.

Example: More years of schooling and longer life expectancy show human development.

AS & A Level Economics

Human development index

An index combining income, education and life expectancy to compare development.

Example: A country with strong schooling and health may have a high HDI.

Read in:Chapter 30
Economics

Human development index

An index combining income, education and life expectancy to compare development.

Example: A country with strong schooling and health may have a high HDI.

Read in:Chapter 32
AS & A Level Business

Human relations approach

The idea that social needs and relationships affect how well people work.

Example: A manager builds teamwork to improve morale.

Read in:Topic 2.2
AS & A Level Business

Human resource management

Managing the people who work for a business, including recruitment, training and performance.

Example: An HR team hires staff and supports their development.

Read in:Topic 2.1
Edexcel Business

Human resource management

Managing the people who work for a business, including recruitment, training and performance.

Example: An HR team hires staff and supports their development.

Read in:Chapter 24
Edexcel Business

Human resources

The people working for a business, and the team that manages staffing matters.

Example: The HR department recruits and trains employees.

Read in:Chapter 24
Business Studies

Human resources

The people working for a business, and the team that manages staffing matters.

Example: The HR department recruits and trains employees.

AS & A Level Business

Hygiene factor

In Herzberg's theory, a condition that prevents dissatisfaction but does not necessarily motivate.

Example: Fair pay and safe working conditions reduce complaints.

Read in:Topic 2.2
AS & A Level Economics

Hyperinflation

Extremely rapid and uncontrolled increases in prices.

Example: Daily price rises make savings lose value quickly.

Read in:Chapter 10
Economics

Hyperinflation

Extremely rapid and uncontrolled increases in prices.

Example: Daily price rises make savings lose value quickly.

Read in:Chapter 31
Computer Science

Hyperlink

A clickable link that opens another page or resource.

Example: Selecting a chapter link opens the notes.

Read in:Topic 5.1
ICT

Hyperlink

A clickable link that opens another page or resource.

Example: A chapter menu links to the next lesson.

Read in:Chapter 10
Computer Science

Hypertext Transfer Protocol

A set of rules for transferring web requests and responses.

Example: A browser uses HTTP when requesting a page.

Read in:Topic 5.1
Mathematics

Hypotenuse

The longest side of a right-angled triangle, opposite the right angle.

Example: In a 3–4–5 triangle, the hypotenuse is 5.

Read in:Chapter 41
AS & A Level Economics

Hysteresis

Long-lasting damage to employment or output caused by a temporary downturn.

Example: Unemployment stays high because workers lose skills during a long recession.

I Dictionary terms

Computer Science

Image resolution

The number of pixels used to form an image, usually width × height.

Example: A 1920 × 1080 image has 1920 pixels across and 1080 down.

Read in:Topic 1.2
AS & A Level Economics

Immigration

People moving into a country to live there.

Example: A family settles in another country for employment.

Read in:Chapter 26
Economics

Immigration

People moving into a country to live there.

Example: A family settles in another country for employment.

Read in:Chapter 34
Computer Science

Implementation

Creating a solution from its design.

Example: A programmer writes code for the planned algorithm.

Read in:Topic 7.1
AS & A Level Economics

Import

A good or service bought from a supplier in another country.

Example: A country buys computers from abroad.

Read in:Chapter 31
Economics

Import

A good or service bought from a supplier in another country.

Example: A country buys computers from abroad.

Read in:Chapter 37
AS & A Level Economics

Import quota

A legal limit on the amount of a product that may be imported.

Example: A quota permits only 10,000 imported cars per year.

Read in:Chapter 12
AS & A Level Economics

Import substitution industrialisation

Supporting domestic production to replace goods previously imported.

Example: A government protects local appliance producers from foreign competition.

Read in:Chapter 31
Edexcel Business

Import tariff

A tax placed on a product entering a country.

Example: A 10% tariff increases the importer's cost.

Read in:Chapter 12
Edexcel Business

Imports

Goods or services bought from another country.

Example: A British shop imports coffee beans from Colombia.

Read in:Chapter 11
Accounting

Imprest system

A petty cash system that restores the cash fund to a fixed agreed amount.

Example: A $100 fund with $35 spent is topped up by $35.

Read in:Chapter 5
Mathematics

Improper fraction

A fraction with a numerator greater than or equal to its denominator.

Example: 7/4 is an improper fraction.

Read in:Chapter 4
AS & A Level Economics

Incentive

Something that encourages a person or business to act.

Example: Higher wages encourage more people to train as nurses.

Economics

Incentive

Something that encourages a person or business to act.

Example: Higher wages encourage more people to train as nurses.

Read in:Chapter 6
Economics

Incentive to invest

A benefit that encourages firms to buy machines or expand.

Example: A tax allowance encourages a factory to buy equipment.

Read in:Chapter 28
Economics

Incentives to invest

Policies that encourage businesses to spend on equipment, skills or facilities.

Example: A tax allowance makes purchasing machines more attractive.

Read in:Chapter 28
AS & A Level Economics

Incentives to work

Policies or benefits that encourage people to seek or keep employment.

Example: Lower income tax may encourage some people to work more hours.

Read in:Chapter 26
Economics

Incentives to work

Policies or benefits that encourage people to seek or keep employment.

Example: Lower income tax may encourage some people to work more hours.

Read in:Chapter 28
Accounting

Income and expenditure account

A club's statement showing income earned, expenses incurred and the surplus or deficit.

Example: It records this year's subscription income even if not all cash was received.

Read in:Chapter 18
AS & A Level Economics

Income approach

Measuring GDP by adding incomes earned from producing goods and services.

Example: Wages, rent, interest and profit contribute to national income.

Read in:Chapter 6
AS & A Level Economics

Income distribution

How total income is shared among people or groups in an economy.

Example: A country may have high GDP but most income may go to a small group.

AS & A Level Economics

Income effect

The change in what consumers can afford when a price change alters their purchasing power.

Example: Cheaper rice leaves a household with money for other items.

AS & A Level Business

Income elasticity of demand

How strongly quantity demanded responds to a percentage change in income.

Example: Income rises 10% and demand for holidays rises 15%.

Read in:Topic 8.1
AS & A Level Economics

Income elasticity of demand

How responsive quantity demanded is to a change in consumer income.

Example: A 10% income increase causing 15% more restaurant meals gives YED of 1.5.

AS & A Level Economics

Income inequality

An uneven distribution of income among people.

Example: A country where a few people earn most income has high inequality.

Read in:Chapter 30
Economics

Income inequality

An uneven distribution of income among people.

Example: A country where a few people earn most income has high inequality.

Read in:Chapter 32
Accounting

Income receivable

Income already earned but not yet received.

Example: Interest earned in June but paid in July is income receivable.

Read in:Chapter 12
Accounting

Income received in advance

Money received before it has been earned.

Example: Rent collected in December for January is income in advance.

Read in:Chapter 12
Accounting

Income statement

A financial statement that shows a business's income, costs and profit or loss over a period.

Example: A shop prepares an income statement for the year.

Edexcel Business

Income statement

A financial statement showing revenue, costs and profit over a period.

Example: A business prepares an income statement for the year.

Read in:Chapter 29
Business Studies

Income statement

A financial statement showing revenue, costs and profit over a period.

Example: A business prepares an income statement for the year.

Economics

Income support

Payments or assistance that help households meet living costs.

Example: A low-income family receives extra help with rent.

Read in:Chapter 33
Accounting

Incomplete records

Accounting records that are missing some information or do not use full double entry.

Example: A small shop keeps only receipts and payment notes.

Read in:Chapter 20
Edexcel Business

Incorporated business

A business legally separate from its owners.

Example: A limited company can own property in its own name.

Read in:Chapter 3
Business Studies

Incorporated business

A business legally separate from its owners.

Example: A limited company can own property in its own name.

Read in:Chapter 4
AS & A Level Business

Incorporation

The legal process that creates a company separate from its owners.

Example: A partnership registers as a limited company.

Read in:Topic 1.2
Edexcel Business

Incorporation

The legal process that creates a company separate from its owners.

Example: A partnership registers as a limited company.

Read in:Chapter 4
Accounting

Incorrect classification

Recording a transaction in the wrong accounting category.

Example: Treating the cost of a new building as rent is incorrect classification.

Read in:Chapter 10
Accounting

Increase in provision

A rise in the estimated amount of doubtful customer debts.

Example: The allowance rises from $200 to $250, increasing expense by $50.

Read in:Chapter 13
AS & A Level Business

Incremental budgeting

Preparing a new budget by adjusting the previous one.

Example: A department increases last year's budget by 4%.

Read in:Topic 5.5
Edexcel Business

Independence

Having the freedom to make decisions without being controlled by an employer.

Example: A sole trader chooses their own opening hours.

Read in:Chapter 2
Mathematics

Independent events

Events where the result of one does not affect the probability of another.

Example: Two separate fair coin tosses are independent.

Read in:Chapter 44
Computer Science

Index

A number or position used to select one element of an array.

Example: names[3] selects the item at index 3.

Read in:Topic 8.2
Mathematics

Index

The raised number showing how many times the base is multiplied by itself.

Example: In 2⁵, the index is 5.

Read in:Chapter 7
Mathematics

Index law

A rule for simplifying expressions involving powers.

Example: When multiplying powers with the same base, add the indices.

Mathematics

Index notation

A way of writing repeated multiplication using a base and an index.

Example: 4 × 4 × 4 can be written as 4³.

Read in:Chapter 7
AS & A Level Economics

Indifference curve

A curve showing combinations of two goods that give the consumer equal satisfaction.

Example: A student is equally happy with two books and one game or one book and two games.

Read in:Chapter 14
AS & A Level Business

Indirect cost

A cost shared by multiple products or activities.

Example: Factory lighting is an indirect cost.

Read in:Topic 5.4
Accounting

Indirect labour

Wages of factory workers who support production rather than make a particular product.

Example: A factory cleaner's wages are indirect labour.

Read in:Chapter 19
Accounting

Indirect materials

Materials used in production but not easily traced to one product.

Example: Cleaning supplies used throughout a factory are indirect materials.

Read in:Chapter 19
AS & A Level Economics

Indirect tax

A tax on goods and services, often increasing their selling price.

Example: A sales tax increases the cost of a drink.

Economics

Indirect tax

A tax on goods and services, often increasing their selling price.

Example: A sales tax increases the cost of a drink.

AS & A Level Economics

Individual demand

The quantity one buyer is willing and able to purchase at different prices.

Example: One household buys two cartons of milk per week at a given price.

AS & A Level Economics

Individual supply

The quantity one producer is willing and able to sell at different prices.

Example: A farmer supplies 50 kg of tomatoes per week at the current price.

Read in:Chapter 2
AS & A Level Business

Induction training

Training that helps new staff settle into a job and workplace.

Example: A new employee learns safety rules on the first day.

Read in:Topic 2.1
Edexcel Business

Induction training

Training that helps a new worker understand the job and workplace.

Example: A new employee learns safety rules on their first day.

Read in:Chapter 20
Business Studies

Induction training

Training that helps a new worker understand the job and workplace.

Example: A new employee learns safety rules on their first day.

Read in:Chapter 8
Economics

Industrial action

Steps workers take to pressure an employer during a dispute.

Example: Workers hold a strike to seek safer conditions.

Read in:Chapter 19
Edexcel Business

Industrial relations

The relationship between employers, employees and their representatives.

Example: Managers meet staff representatives to discuss pay and conditions.

Read in:Chapter 24
Computer Science

Industrial robot

A robot used for tasks in manufacturing or industry.

Example: A robot arm repeats a precise assembly movement.

Read in:Topic 6.2
Edexcel Business

Industrial robots

Programmable machines used to carry out repeated or precise tasks in production.

Example: A robotic arm assembles electronic components.

Read in:Chapter 43
Accounting

Industry average

A typical performance figure for businesses in the same industry.

Example: A shop compares its margin with other retailers.

Read in:Chapter 23
Mathematics

Inequality

A statement showing that two values are not equal, or that one is no greater than another.

Example: 7 > 4 is an inequality.

Computer Science

Inference engine

The part of an expert system that applies rules to reach conclusions.

Example: The inference engine links a symptom to possible causes.

Read in:Topic 6.3
ICT

Inference engine

The part of an expert system that applies rules to reach a conclusion.

Example: The system uses symptoms to suggest a diagnosis.

Read in:Chapter 6
AS & A Level Business

Inferior good

A good for which demand generally falls as income rises.

Example: Some shoppers buy fewer budget noodles when they earn more.

Read in:Topic 8.1
AS & A Level Economics

Inferior good

A good for which demand falls as income rises, other things equal.

Example: As incomes rise, some commuters switch from bus travel to taxis.

AS & A Level Business

Inflation

A sustained rise in the general level of prices.

Example: The average price of goods rises by 4% in a year.

Read in:Topic 6.1
AS & A Level Economics

Inflation

A sustained increase in the general price level over time.

Example: If prices rise by 5% overall, money buys fewer goods.

Economics

Inflation

A sustained increase in the general price level over time.

Example: If prices rise by 5% overall, money buys fewer goods.

Edexcel Business

Inflation

A continuing rise in the general price level.

Example: Food and transport prices rise across the economy.

Business Studies

Inflation

A continuing rise in the general price level.

Example: Food and transport prices rise across the economy.

Read in:Chapter 27
Accounting

Inflation effect

How rising prices can make old recorded costs less useful for comparisons.

Example: A building purchased years ago may cost far more to replace now.

Read in:Chapter 25
AS & A Level Economics

Inflation rate

The percentage increase in the general price level over a period.

Example: An index moving from 120 to 126 implies inflation of 5%.

AS & A Level Business

Informal communication

Unofficial exchanges between people in a business.

Example: Colleagues discuss work during lunch.

Read in:Topic 7.2
Edexcel Business

Informal communication

Unofficial conversations between people at work.

Example: Colleagues discuss a project during lunch.

Read in:Chapter 16
Business Studies

Informal communication

Unofficial conversations between people at work.

Example: Colleagues discuss a project during lunch.

Read in:Chapter 9
AS & A Level Business

Informal organisation

Unofficial relationships and communication that develop alongside the formal structure.

Example: Employees share advice through an informal peer network.

Read in:Topic 7.1
AS & A Level Economics

Information failure

When buyers or sellers lack the facts needed to make good decisions.

Example: A buyer does not know a used car has hidden faults.

Economics

Information failure

When buyers or sellers lack the facts needed to make good decisions.

Example: A buyer does not know a used car has hidden faults.

Read in:Chapter 14
AS & A Level Business

Information overload

Receiving more information than someone can process effectively.

Example: An employee misses a key task in 100 emails.

Read in:Topic 7.2
Edexcel Business

Information overload

Receiving more information than someone can process effectively.

Example: An employee misses a key task in 100 emails.

Read in:Chapter 17
Business Studies

Informative advertising

Advertising that gives facts about a product so customers can make a choice.

Example: An advert lists a laptop's battery life and price.

Read in:Chapter 15
AS & A Level Economics

Infrastructure

Basic systems that support economic activity, such as roads, power and internet.

Example: Reliable roads help firms deliver goods.

Economics

Infrastructure

Basic systems that support economic activity, such as roads, power and internet.

Example: Reliable roads help firms deliver goods.

Edexcel Business

Infrastructure

Basic systems that support economic activity, such as roads, power and internet.

Example: Reliable roads help firms deliver goods.

Economics

Infrastructure gap

A shortage of transport, energy, communications or other basic systems.

Example: Poor roads make it costly for farmers to reach markets.

Read in:Chapter 35
AS & A Level Economics

Injections

Spending added to the circular flow through investment, government spending and exports.

Example: Government building projects inject spending into the economy.

Computer Science

Inkjet printer

A printer that sprays tiny ink droplets onto paper.

Example: A home printer produces colour photographs.

Read in:Topic 3.2
ICT

Inkjet printer

A printer that sprays tiny drops of ink onto paper.

Example: A family prints colour photographs on an inkjet printer.

Read in:Chapter 2
AS & A Level Business

Innovation

Introducing a new or improved product, method or way of working.

Example: A retailer introduces same-day delivery.

Read in:Topic 1.1
Computer Science

Input

Data provided to a program or system.

Example: A user enters a temperature.

Read in:Topic 7.2
Computer Science

Input device

Hardware used to enter data into a computer.

Example: A scanner is an input device.

Read in:Topic 3.2
ICT

Input device

Hardware used to enter data or instructions into a computer.

Example: A microphone inputs sound.

Read in:Chapter 1
Computer Science

Input signal

A value entering a logic circuit, usually 0 or 1.

Example: An alarm sensor supplies input A.

Read in:Topic 10.1
AS & A Level Business

Insolvency

Being unable to pay debts when they fall due or having liabilities greater than assets, depending on the legal test.

Example: A business cannot meet a loan payment when it is due.

Read in:Topic 5.1
Edexcel Business

Insolvency

Being unable to pay debts when they fall due or having liabilities greater than assets, depending on the legal test.

Example: A business cannot meet a loan payment when it is due.

Read in:Chapter 15
Edexcel Business

Inspection

Checking products or work to identify defects or failures.

Example: A worker examines bottles before packaging them.

Read in:Chapter 45
Computer Science

Integer

A whole-number data type, with no decimal part.

Example: −3 and 25 are integers.

Read in:Topic 8.1
Mathematics

Integer

A whole number that can be positive, negative or zero.

Example: −4, 0 and 12 are integers.

Read in:Chapter 1
Mathematics

Integer solution

A whole-number value that makes a statement true.

Example: For 1 < x < 4, the integer solutions are 2 and 3.

Read in:Chapter 24
Computer Science

Integrated development environment

Software combining tools for writing, testing and debugging programs.

Example: An IDE may provide a code editor and debugger.

Read in:Topic 4.2
AS & A Level Business

Integrated marketing

Coordinating marketing activities so the message and customer experience are consistent.

Example: A campaign uses the same theme online and in shops.

Read in:Topic 8.2
Accounting

Inter-firm comparison

Comparing financial performance or ratios of two or more businesses.

Example: Two retailers compare their gross profit margins.

Read in:Chapter 23
ICT

Interaction

When users can respond to or control what a system does.

Example: A quiz lets a student choose an answer and get feedback.

Read in:Chapter 9
Mathematics

Intercept

Where a graph crosses one of the coordinate axes.

Example: y = 2x + 3 meets the y-axis at 3.

Read in:Chapter 28
AS & A Level Economics

Interdependence

When a firm's decisions depend on how rivals are expected to respond.

Example: One petrol station considers whether a rival will match its price cut.

Edexcel Business

Interdependence

When a firm's decisions depend on how rivals are expected to respond.

Example: One petrol station considers whether a rival will match its price cut.

Read in:Chapter 7
AS & A Level Economics

Interest

Payment received for saving or paid for borrowing money.

Example: A bank charges interest on a loan.

Economics

Interest

Payment received for saving or paid for borrowing money.

Example: A bank charges interest on a loan.

Accounting

Interest on capital

An allowance to a partner based on the capital they invested.

Example: 5% on $10,000 capital gives $500 allowance.

Read in:Chapter 16
Accounting

Interest on drawings

A charge to a partner for taking money out of the business.

Example: A partner may be charged interest on personal withdrawals.

Read in:Chapter 16
AS & A Level Economics

Interest rate

The percentage charged on a loan or paid on savings over a period.

Example: A 5% yearly interest rate costs $5 on a $100 loan for one year.

Read in:Chapter 32
Economics

Interest rate

The percentage charged on a loan or paid on savings over a period.

Example: A 5% yearly interest rate costs $5 on a $100 loan for one year.

Read in:Chapter 17
Business Studies

Interest rate

The percentage paid to borrow money or earned on savings.

Example: A 6% annual interest rate makes borrowing more expensive than 3%.

Read in:Chapter 27
Edexcel Business

Interest rates

The percentages charged on loans or paid on savings.

Example: Higher interest rates make borrowing more expensive.

Read in:Chapter 12
Accounting

Interested parties

People or groups who use a business's accounting information.

Example: A bank checks accounts before agreeing to lend.

Edexcel Business

Intermediary

A business or person that helps products move from producers to customers.

Example: A wholesaler connects a manufacturer with local shops.

Read in:Chapter 38
AS & A Level Business

Internal communication

Sharing information among people within an organisation.

Example: A manager emails staff about new opening hours.

Read in:Topic 7.2
Edexcel Business

Internal communication

Messages exchanged between people within the same organisation.

Example: A supervisor emails a team about a meeting.

Read in:Chapter 16
Business Studies

Internal communication

Messages exchanged between people within the same organisation.

Example: A supervisor emails a team about a meeting.

Read in:Chapter 9
AS & A Level Business

Internal customer

Someone within a business who receives work or services from another part.

Example: The assembly team is the warehouse team's internal customer.

Read in:Topic 9.2
AS & A Level Business

Internal economies of scale

Cost savings gained within a growing business.

Example: A large firm uses specialist machinery to reduce unit costs.

Read in:Topic 9.1
Edexcel Business

Internal economies of scale

Cost savings gained within a growing business.

Example: A large firm uses specialist machinery to reduce unit costs.

Read in:Chapter 40
AS & A Level Business

Internal finance

Money raised from within the business rather than from outside lenders or investors.

Example: A firm uses retained profit to buy equipment.

Read in:Topic 5.2
Business Studies

Internal finance

Money raised from inside the business.

Example: A firm uses retained profit to buy equipment.

Read in:Chapter 22
Business Studies

Internal growth

Growing by expanding a business's own activities.

Example: A bakery opens another branch.

Read in:Chapter 3
AS & A Level Business

Internal recruitment

Filling a vacancy with an existing employee.

Example: A shop promotes a team leader to manager.

Read in:Topic 2.1
Edexcel Business

Internal recruitment

Filling a job with someone who already works for the business.

Example: A shop promotes an existing assistant to supervisor.

Read in:Chapter 18
Business Studies

Internal recruitment

Filling a job with someone who already works for the business.

Example: A shop promotes an existing assistant to supervisor.

Read in:Chapter 8
AS & A Level Business

Internal stakeholder

Someone inside the organisation with an interest in its decisions.

Example: Employees and managers are internal stakeholders.

Read in:Topic 1.5
Accounting

Internal users

People inside a business who use accounting information.

Example: A manager uses cost figures to plan spending.

Accounting

International Accounting Standards

Rules developed to help make financial reporting consistent and understandable.

Example: Standards guide how firms prepare reports.

Read in:Chapter 25
AS & A Level Economics

International Labour Organization definition

A measure counting people without work who are available for and actively seeking employment.

Example: Someone who wants a job but has stopped searching may be excluded.

Read in:Chapter 9
AS & A Level Economics

International Monetary Fund

An international organisation that supports monetary cooperation and lends to countries facing external financial difficulties.

Example: The IMF may provide funding linked to economic reforms.

Read in:Chapter 31
AS & A Level Economics

International specialisation

Countries concentrating production on goods and services they can make relatively effectively.

Example: One country produces coffee while another makes machinery.

Read in:Chapter 32
Economics

International specialisation

Countries concentrating production on goods and services they can make relatively effectively.

Example: One country produces coffee while another makes machinery.

Read in:Chapter 36
Edexcel Business

International takeover

When a business from one country acquires control of a company in another.

Example: An overseas manufacturer purchases a local rival.

Read in:Chapter 9
AS & A Level Economics

International trade

Buying and selling goods and services across national borders.

Example: A car made in Japan is sold in Canada.

Economics

International trade

Buying and selling goods and services across national borders.

Example: A car made in Japan is sold in Canada.

Edexcel Business

International trade

Buying and selling goods and services between countries.

Example: A country exports coffee and imports cars.

Business Studies

International trade

Buying and selling goods and services between countries.

Example: A country exports coffee and imports cars.

Read in:Chapter 29
Computer Science

Internet

A worldwide network of connected computer networks.

Example: A student uses the internet to access a school website.

Read in:Topic 5.1
ICT

Internet

A worldwide network connecting many smaller computer networks.

Example: A phone connects to an online service through the internet.

Read in:Chapter 10
Computer Science

Internet service provider

A company that provides access to the internet.

Example: A home broadband supplier is an ISP.

Read in:Topic 5.1
ICT

Internet service provider

A company that provides access to the internet.

Example: A household pays an ISP for broadband.

Read in:Chapter 10
Computer Science

Interpreter

Software that reads and runs a program, usually translating it while executing.

Example: A Python interpreter runs code one statement at a time in a simple model.

Read in:Topic 4.2
Computer Science

Interrupt

A signal that makes the CPU pause its current task to deal with an event.

Example: A keyboard press may generate an interrupt.

Read in:Topic 4.1
Computer Science

Interrupt service routine

A small program run to respond to an interrupt.

Example: The CPU runs a routine to handle a completed disk operation.

Read in:Topic 4.1
Mathematics

Intersection

The items that two sets have in common.

Example: The intersection of {1, 2} and {2, 3} is {2}.

Read in:Chapter 2
Edexcel Business

Interview

A discussion used to gather detailed information from a person.

Example: A manager describes problems with the existing system.

Read in:Chapter 18
ICT

Interview

A discussion used to gather detailed information from a person.

Example: A manager describes problems with the existing system.

Read in:Chapter 7
AS & A Level Business

Intranet

A private internal network or website used by an organisation.

Example: Employees find policies on the company intranet.

Read in:Topic 7.2
ICT

Intranet

A private network or website used within an organisation.

Example: A school intranet holds staff notices.

Read in:Chapter 10
AS & A Level Business

Intrapreneur

An employee who develops a new idea or venture within an existing business.

Example: An engineer creates a new product for her employer.

Read in:Topic 1.1
Mathematics

Invariant

A property or point that remains unchanged by a transformation.

Example: Distances are invariant under a rotation.

Read in:Chapter 42
Accounting

Inventory

Goods held for resale or materials and partly finished goods used in production.

Example: A shop's unsold shoes are inventory.

Read in:Chapter 14
AS & A Level Business

Inventory

Materials and products a business keeps for future use or sale.

Example: A shop stores goods before customers buy them.

Read in:Topic 4.2
Edexcel Business

Inventory

Materials, unfinished goods or finished goods held by a business.

Example: A shop keeps extra stock for busy days.

Accounting

Inventory count

Physically checking how many goods are in stock.

Example: A shop counts every unsold item at year-end.

Read in:Chapter 14
AS & A Level Business

Inventory holding cost

The cost of storing goods, including rent, insurance and deterioration.

Example: Frozen goods need costly chilled storage.

Read in:Topic 4.2
AS & A Level Business

Inventory turnover

A measure of how quickly inventory is sold or used during a period.

Example: A retailer replaces its average stock six times a year.

Read in:Topic 10.2
Mathematics

Inverse function

A function that reverses another one when an inverse exists.

Example: The inverse of f(x)=x+4 is f⁻¹(x)=x−4.

Read in:Chapter 30
Mathematics

Inverse operation

An operation that undoes another operation.

Example: Division undoes multiplication.

Read in:Chapter 14
Mathematics

Inverse proportion

Two positive quantities change so that their product stays constant.

Example: If 2 workers take 6 hours, 4 equally fast workers take 3 hours.

Read in:Chapter 26
Mathematics

Inverse square

A relationship that gets smaller in proportion to one divided by the square of another value.

Example: Light intensity from a point source falls roughly with distance squared.

Read in:Chapter 26
AS & A Level Economics

Investment

Spending on capital goods that can increase future production.

Example: A firm buys new machinery to expand production.

Economics

Investment

Spending on capital goods that can increase future production.

Example: A firm buys new machinery to expand production.

AS & A Level Business

Investment appraisal

Evaluating whether a long-term project is financially worthwhile.

Example: A factory compares the expected returns from two machines.

Read in:Topic 10.3
Edexcel Business

Investment decisions

Choices about spending money on assets or projects expected to bring future benefits.

Example: A manufacturer assesses whether to buy a new machine.

Read in:Chapter 32
AS & A Level Business

Investment risk

The possibility that actual returns will differ from expected returns.

Example: A new factory may sell fewer units than forecast.

Read in:Topic 10.3
Accounting

Investor

Someone who provides money expecting a return or increase in value.

Example: An investor buys shares in a company.

Read in:Chapter 24
Economics

Invisible trade

International trade in services.

Example: Foreign visitors paying for hotel stays create service exports.

Read in:Chapter 39
Accounting

Invoice

A document sent by the seller showing what a customer owes for goods or services.

Example: An invoice asks a customer to pay $250 for supplies.

Read in:Chapter 4
Computer Science

IP address

A number used to identify and route data to a device on a network.

Example: A router forwards packets using IP addresses.

Read in:Topic 3.4
ICT

IP address

A numerical address used to identify a device on a network.

Example: A router forwards a packet towards its destination IP address.

Read in:Chapter 4
Mathematics

Irrational number

A number that cannot be written as a fraction of two integers.

Example: The square root of 2 is irrational.

Read in:Chapter 1
Accounting

Irrecoverable debt

A customer debt that a business no longer expects to collect.

Example: A customer owing $300 is declared bankrupt.

Read in:Chapter 13
Accounting

Irrecoverable debts recovered

Money collected after a customer debt was previously written off.

Example: A customer unexpectedly repays $40 of a debt written off last year.

Read in:Chapter 13
Edexcel Business

ISO certification

Formal recognition that an organisation meets a specific international management standard.

Example: A manufacturer gains ISO 9001 certification for its quality system.

Read in:Chapter 45
Mathematics

Isosceles triangle

A triangle with two equal sides and two equal base angles.

Example: A triangle with sides 5 cm, 5 cm and 6 cm is isosceles.

Read in:Chapter 37
Computer Science

Iteration

Repeating instructions while or until a condition is met.

Example: A loop prints numbers from 1 to 10.

Read in:Topic 7.3
Computer Science

Iteration count

The number of times a loop has repeated.

Example: A loop that runs five times has five iterations.

Read in:Topic 7.7

J Dictionary terms

AS & A Level Economics

J-curve effect

An initial worsening of the trade balance after depreciation, followed by improvement if volumes adjust.

Example: Import bills rise immediately but export sales increase only after a delay.

Edexcel Business

Jargon

Special words used by a profession or group that outsiders may not understand.

Example: A manager explains technical jargon before a meeting.

Read in:Chapter 17
Business Studies

Job analysis

Studying what a job involves and what skills it needs.

Example: A restaurant identifies the duties of a head chef.

Read in:Chapter 8
AS & A Level Business

Job description

A document outlining a job's duties and responsibilities.

Example: A cashier's description includes taking payments.

Read in:Topic 2.1
Edexcel Business

Job description

A document listing the duties and responsibilities of a job.

Example: A cashier's description includes handling customer payments.

Read in:Chapter 18
Business Studies

Job description

A document listing the duties and responsibilities of a job.

Example: A cashier's description includes handling customer payments.

Read in:Chapter 8
AS & A Level Business

Job enlargement

Adding more tasks at a similar level of responsibility.

Example: A receptionist also manages meeting-room bookings.

Read in:Topic 2.2
Edexcel Business

Job enlargement

Adding more tasks at a similar level of responsibility.

Example: A receptionist also manages meeting-room bookings.

Read in:Chapter 22
AS & A Level Business

Job enrichment

Giving employees more meaningful responsibilities and decision-making.

Example: A worker is allowed to plan and check their own tasks.

Read in:Topic 2.2
Edexcel Business

Job enrichment

Giving employees more responsibility or interesting tasks.

Example: A worker is allowed to plan their own work schedule.

Business Studies

Job enrichment

Giving employees more responsibility or interesting tasks.

Example: A worker is allowed to plan their own work schedule.

Read in:Chapter 6
AS & A Level Business

Job production

Making a single product to a customer's specific requirements.

Example: A builder constructs a custom house.

Read in:Topic 4.1
Edexcel Business

Job production

Making one item or project at a time, usually to a customer's requirements.

Example: A tailor makes a custom wedding suit.

Read in:Chapter 41
Business Studies

Job production

Making one item or project at a time, usually to a customer's requirements.

Example: A tailor makes a custom wedding suit.

Read in:Chapter 18
AS & A Level Business

Job rotation

Moving employees between tasks or roles to build variety and skills.

Example: Warehouse workers rotate between packing and receiving.

Read in:Topic 2.2
Edexcel Business

Job rotation

Moving employees between different tasks or roles.

Example: A shop worker spends time on the till and in stock control.

Business Studies

Job rotation

Moving employees between different tasks or roles.

Example: A shop worker spends time on the till and in stock control.

Read in:Chapter 6
Edexcel Business

Job satisfaction

How positively a person feels about their work.

Example: Interesting tasks and recognition improve job satisfaction.

Read in:Chapter 21
AS & A Level Business

Job sharing

Two or more people dividing the duties of one full-time job.

Example: Two staff each work half the week in one role.

Read in:Topic 7.4
Edexcel Business

Job sharing

Two or more people dividing the duties of one full-time job.

Example: Two staff each work half the week in one role.

Read in:Chapter 18
Edexcel Business

Job vacancy

An unfilled position that an employer wants someone to take.

Example: A supermarket advertises a cashier vacancy.

Read in:Chapter 18
AS & A Level Economics

Joint demand

When two goods are used together and demand for one affects the other.

Example: Higher demand for cars can raise demand for petrol.

Read in:Chapter 4
AS & A Level Economics

Joint supply

When producing one product also creates another product.

Example: Processing crude oil produces petrol and diesel together.

AS & A Level Business

Joint venture

When two or more businesses work together on a particular project.

Example: Two builders cooperate to develop a shopping centre.

Read in:Topic 1.2
Business Studies

Joint venture

When two or more businesses work together on a particular project or business.

Example: Two firms partner to develop a new electric vehicle.

Accounting

Journal correction

An entry used to reverse or repair an accounting mistake.

Example: The bookkeeper debits the correct expense and credits the wrong one.

Read in:Chapter 7
ICT

Joystick

An input device used to control movement in games or simulations.

Example: A flight simulator uses a joystick.

Read in:Chapter 2
AS & A Level Business

Just-in-case inventory

Holding extra stocks in case supplies or demand are unpredictable.

Example: A pharmacy keeps additional stock ahead of winter.

Read in:Topic 4.2
Business Studies

Just-in-time

A system where materials arrive shortly before they are needed.

Example: A factory orders parts to arrive on the day of assembly.

Read in:Chapter 18
AS & A Level Business

Just-in-time inventory

Receiving materials close to when they are needed, keeping stocks low.

Example: A car plant receives seats on the day they are installed.

Read in:Topic 4.2
Edexcel Business

Just-in-time production

Producing or receiving materials only when they are needed rather than storing large stocks.

Example: A factory receives car seats shortly before assembly.

Read in:Chapter 42

K Dictionary terms

Edexcel Business

Kaizen

Making many small, continuous improvements to how work is done.

Example: Workers suggest a better way to arrange tools.

Read in:Chapter 42
Business Studies

Kaizen

Making many small, continuous improvements to how work is done.

Example: Workers suggest a better way to arrange tools.

ICT

Keyboard

An input device with keys for typing text and commands.

Example: A student types a report on a keyboard.

Read in:Chapter 2
ICT

Keylogger

Software or hardware that records keys pressed on a keyboard.

Example: A keylogger steals passwords as a person types.

Read in:Chapter 8
Computer Science

Kilobyte

A unit of data storage; in decimal notation, one kilobyte is 1,000 bytes.

Example: A tiny text file may be a few kilobytes.

Read in:Topic 1.3
AS & A Level Economics

Kinked demand curve

An oligopoly model where rivals may match price cuts but not price rises, helping explain sticky prices.

Example: A firm fears losing many customers if it raises its price alone.

Computer Science

Knowledge base

The stored facts and rules used by an expert system.

Example: A medical expert system stores known symptoms and conditions.

Read in:Topic 6.3
ICT

Knowledge base

The stored facts and specialist information used by an expert system.

Example: A plant-disease expert system stores symptoms and conditions.

Read in:Chapter 6

L Dictionary terms

AS & A Level Economics

Labour

Human effort used to make goods or provide services.

Example: A nurse's work is labour.

Edexcel Business

Labour

The physical or mental work people do to make goods or provide services.

Example: A chef working in a restaurant provides labour.

Business Studies

Labour

The physical or mental work people do to make goods or provide services.

Example: A chef working in a restaurant provides labour.

Edexcel Business

Labour flexibility

A workforce's ability to adapt its skills, hours or duties to changing needs.

Example: Multiskilled staff switch between checkout and stock duties.

Read in:Chapter 20
AS & A Level Economics

Labour force

People who are employed plus unemployed people actively seeking and available for work.

Example: Workers and jobseekers together make up the labour force.

Economics

Labour force

People who are employed plus unemployed people actively seeking and available for work.

Example: Workers and jobseekers together make up the labour force.

Read in:Chapter 30
AS & A Level Economics

Labour force participation rate

The share of working-age people who are employed or actively seeking work.

Example: If 75 of 100 working-age people participate, the rate is 75%.

AS & A Level Economics

Labour force survey

A survey that estimates unemployment by asking people about their work situation.

Example: Survey responses identify people without jobs who are seeking work.

Read in:Chapter 9
Economics

Labour force survey

A survey that estimates unemployment by asking people about their work situation.

Example: Survey responses identify people without jobs who are seeking work.

Read in:Chapter 30
AS & A Level Economics

Labour market

Where employers looking for workers and people looking for jobs interact.

Example: A hospital competes with clinics to recruit nurses.

Economics

Labour market

Where employers looking for workers and people looking for jobs interact.

Example: A hospital competes with clinics to recruit nurses.

Read in:Chapter 18
AS & A Level Business

Labour productivity

Output produced per worker or per labour hour.

Example: Five workers produce 100 units, or 20 units per worker.

AS & A Level Economics

Labour productivity

Output produced per worker or per hour worked.

Example: After training, each employee assembles more units per hour.

Read in:Chapter 31
Economics

Labour productivity

Output produced per worker or per hour worked.

Example: After training, each employee assembles more units per hour.

Edexcel Business

Labour productivity

Output produced per worker or per labour hour.

Example: Five workers produce 100 units, or 20 units per worker.

Edexcel Business

Labour relations

How employers and their employees work and negotiate with each other.

Example: Managers discuss shift changes with worker representatives.

Read in:Chapter 40
Edexcel Business

Labour supply

The number and types of workers available to employers.

Example: A city with many trained engineers attracts technology firms.

Read in:Chapter 8
AS & A Level Business

Labour turnover

The proportion of employees who leave a business over a period.

Example: Ten of 100 staff leaving in a year gives 10% labour turnover.

Read in:Topic 2.1
Edexcel Business

Labour turnover

The proportion of employees who leave a business over a period.

Example: Ten of 100 staff leaving in a year gives 10% labour turnover.

AS & A Level Business

Labour-intensive production

Production that uses relatively more human labour.

Example: A handmade clothing workshop needs many skilled workers.

Read in:Topic 4.1
AS & A Level Economics

Labour-intensive production

Production using relatively more workers than machines.

Example: Handmade furniture often uses labour-intensive methods.

Read in:Chapter 12
Economics

Labour-intensive production

Production using relatively more workers than machines.

Example: Handmade furniture often uses labour-intensive methods.

Read in:Chapter 21
Edexcel Business

Labour-intensive production

Production that relies mainly on workers rather than machinery.

Example: A handmade pottery workshop uses labour-intensive methods.

Business Studies

Labour-intensive production

Production that relies mainly on workers rather than machinery.

Example: A handmade pottery workshop uses labour-intensive methods.

Read in:Chapter 18
AS & A Level Business

Laissez-faire leadership

A style where employees are given wide freedom to organise their work.

Example: A research team chooses its own methods.

Read in:Topic 7.3
Business Studies

Laissez-faire leadership

A leadership style that gives employees considerable freedom in their work.

Example: An experienced design team chooses how to finish a project.

Read in:Chapter 7
AS & A Level Economics

Land

Natural resources used for production.

Example: Farm land, oil and water are examples of land.

Read in:Chapter 16
Economics

Land

Natural resources used for production.

Example: Farm land, oil and water are examples of land.

Edexcel Business

Land

Natural resources used in production, including land, water and minerals.

Example: A farmer uses land to grow crops.

Read in:Chapter 44
Business Studies

Land

Natural resources used in production, including land, water and minerals.

Example: A farmer uses land to grow crops.

Edexcel Business

Language barrier

Difficulty communicating because people use different languages or language skills.

Example: A safety instruction is misunderstood by a non-native speaker.

Read in:Chapter 17
ICT

Laptop

A portable computer with a built-in screen and keyboard.

Example: A student takes a laptop to class.

Read in:Chapter 1
Economics

Large firm

A business with many workers, high sales or large capital resources.

Example: A nationwide supermarket chain is a large firm.

Read in:Chapter 20
Computer Science

Laser printer

A printer that uses a laser and toner to print.

Example: An office uses a laser printer for letters.

Read in:Topic 3.2
ICT

Laser printer

A printer that uses toner and a laser-based imaging process.

Example: An office prints many sharp text pages quickly.

Read in:Chapter 2
AS & A Level Economics

Law of demand

Usually, a lower price leads to a higher quantity demanded, other things equal.

Example: When cinema tickets become cheaper, more are sold.

Read in:Chapter 2
Economics

Law of demand

Usually, a lower price leads to a higher quantity demanded, other things equal.

Example: When cinema tickets become cheaper, more are sold.

Read in:Chapter 7
AS & A Level Economics

Law of diminishing returns

As more variable input is added to fixed inputs, marginal output eventually falls.

Example: Adding more workers to one small kitchen eventually slows each extra worker's output.

Read in:Chapter 17
Economics

Law of supply

Usually, a higher price leads producers to offer more, other things equal.

Example: Higher ticket prices may encourage an organiser to add seats.

Read in:Chapter 8
AS & A Level Business

Lead time

The time between ordering materials and receiving them.

Example: A supplier takes six days to deliver parts.

Read in:Topic 4.2
AS & A Level Business

Leadership

Influencing and guiding people towards a shared goal.

Example: A team leader encourages employees through a change.

Read in:Topic 7.3
AS & A Level Economics

Leakages

Money withdrawn from the domestic spending flow through saving, taxation and imports.

Example: An increase in household saving can reduce spending on domestic output.

AS & A Level Business

Lean production

An approach focused on removing waste while maintaining customer value.

Example: A factory reduces unnecessary movement and waiting time.

Read in:Topic 9.3
Edexcel Business

Lean production

Making goods efficiently while reducing waste.

Example: A factory cuts wasted materials and unnecessary movement.

Business Studies

Lean production

Making goods efficiently while reducing waste.

Example: A factory cuts wasted materials and unnecessary movement.

AS & A Level Business

Leasing

Paying to use an asset without necessarily owning it.

Example: A business leases a photocopier monthly.

Read in:Topic 5.2
Computer Science

Least significant bit

The bit with the lowest place value, at the right of a binary number.

Example: In 1001, the rightmost 1 is the least significant bit.

Read in:Topic 1.1
Accounting

Ledger

The collection of accounts used to record a business's transactions.

Example: The sales ledger contains customer accounts.

Read in:Chapter 3
Edexcel Business

Legal controls

Rules set by law that restrict or guide business behaviour.

Example: Planning regulations can limit where a factory may be built.

Read in:Chapter 8
Edexcel Business

Legislation

Laws made by a government or law-making body.

Example: Employment legislation sets rules for employers.

Accounting

Lender

A person or organisation that provides money to be repaid, often with interest.

Example: A bank may lend $5,000 for equipment.

Read in:Chapter 24
Computer Science

Length check

Checking the number of characters in an entry.

Example: A password must contain at least eight characters.

Read in:Topic 7.5
ICT

Length check

A validation rule checking how many characters were entered.

Example: A password must contain at least eight characters.

Read in:Chapter 7
Mathematics

Length scale factor

The number used to change every matching length in a similar shape.

Example: From side 4 cm to 12 cm, the length scale factor is 3.

Read in:Chapter 35
Accounting

Liability

An amount a business owes to another person or organisation.

Example: A bank loan is a liability.

Business Studies

Liability

Money or another obligation a business owes.

Example: A bank loan is a liability.

Read in:Chapter 25
ICT

Licence agreement

Terms that explain how software may be used.

Example: A licence may limit installation to one device.

Read in:Chapter 9
Business Studies

Licensing

Giving another business permission to use intellectual property in return for payment.

Example: A toy maker pays to use a film character on products.

Read in:Chapter 17
AS & A Level Economics

Life expectancy

The average number of years a newborn is expected to live under current death rates.

Example: Better healthcare may increase life expectancy.

Read in:Chapter 30
Economics

Life expectancy

The average number of years a newborn is expected to live under current death rates.

Example: Better healthcare may increase life expectancy.

Edexcel Business

Lifestyle segmentation

Dividing customers into groups based on activities, values and interests.

Example: A travel company targets people who enjoy adventure holidays.

Read in:Chapter 35
ICT

Light-emitting diode

A tiny electronic light used in displays and indicators.

Example: LEDs can provide backlighting for a monitor.

Read in:Chapter 2
Mathematics

Like surds

Surds with the same root part that can be added or subtracted.

Example: 2√5 and 3√5 are like surds.

Read in:Chapter 18
Mathematics

Like terms

Terms with exactly the same variable parts and powers.

Example: 3x and 5x are like terms; 3x and 3x² are not.

Read in:Chapter 20
Accounting

Like-for-like comparison

A comparison between businesses or periods with similar conditions.

Example: Compare two shops of similar size rather than a corner shop with a national chain.

Read in:Chapter 23
AS & A Level Economics

Limit pricing

Setting a low price to discourage potential rivals from entering a market.

Example: An established company prices just low enough to make entry unattractive.

Read in:Chapter 20
Accounting

Limited company

A business with a legal identity separate from its owners, whose liability is normally limited.

Example: A company can own assets and owe debts in its own name.

Read in:Chapter 17
Economics

Limited company

A business legally separate from its owners, whose liability is generally limited.

Example: Shareholders usually risk only the money invested in shares.

Read in:Chapter 20
Accounting

Limited liability

A legal protection that usually limits owners' loss to what they invested in a company.

Example: A shareholder normally does not pay company debts from personal savings.

Read in:Chapter 24
AS & A Level Business

Limited liability

When owners usually risk only the money they invested in a company.

Example: A shareholder normally does not pay company debts personally.

Read in:Topic 1.2
Edexcel Business

Limited liability

Owners normally risk only the money they invested in the business.

Example: A shareholder does not usually have to pay the company's debts personally.

Business Studies

Limited liability

Owners normally risk only the money they invested in the business.

Example: A shareholder does not usually have to pay the company's debts personally.

Read in:Chapter 4
AS & A Level Business

Line manager

A manager directly responsible for employees who perform the organisation's main work.

Example: A factory supervisor manages production workers.

Read in:Topic 7.1
Mathematics

Line of symmetry

A line dividing a shape into mirror-image halves.

Example: A square has four lines of symmetry.

Read in:Chapter 36
Mathematics

Line segment

A straight part of a line with two endpoints.

Example: The segment joining A and B has a fixed length.

Read in:Chapter 32
Mathematics

Linear equation

An equation in which the highest power of the unknown is 1.

Example: 2x + 3 = 9 is linear.

Read in:Chapter 23
Mathematics

Linear graph

The straight-line graph of a linear function.

Example: y = 2x + 1 is a straight line.

Read in:Chapter 29
Computer Science

Linear search

Checking items one at a time until the wanted item is found.

Example: A program checks each name in a list for Sam.

Read in:Topic 7.4
ICT

Liquid crystal display

A flat screen that controls light using liquid crystals.

Example: A laptop screen may use LCD technology.

Read in:Chapter 2
Accounting

Liquid ratio

Current assets excluding inventory, divided by current liabilities.

Example: Liquid assets $3,000 and current liabilities $2,000 give 1.5:1.

AS & A Level Business

Liquidation

The process of closing a company and using its assets to settle claims.

Example: A company sells equipment to pay creditors during closure.

Read in:Topic 5.1
Accounting

Liquidity

How easily a business can meet its short-term payments when they are due.

Example: A company with cash available to pay bills has good liquidity.

AS & A Level Business

Liquidity

A business's ability to meet debts that must be paid soon.

Example: A business with enough cash to pay suppliers has good liquidity.

Read in:Topic 5.1
AS & A Level Economics

Liquidity

How easily an asset can be turned into money without losing much value.

Example: Cash is more liquid than a house.

Economics

Liquidity

How easily an asset can be turned into money without losing much value.

Example: Cash is more liquid than a house.

Read in:Chapter 16
Edexcel Business

Liquidity

How easily a business can meet its short-term payments.

Example: A firm with plenty of cash can pay bills on time.

Business Studies

Liquidity

How easily a business can meet its short-term payments.

Example: A firm with plenty of cash can pay bills on time.

Read in:Chapter 26
AS & A Level Business

Liquidity management

Planning cash and short-term assets so payments can be made when due.

Example: A business maintains cash reserves for supplier invoices.

Read in:Topic 10.4
AS & A Level Economics

Liquidity preference

The desire to hold wealth as money rather than less liquid assets.

Example: People hold more cash when they expect interest rates to rise.

Read in:Chapter 27
Accounting

Liquidity problem

Difficulty paying short-term debts on time.

Example: A profitable shop may still struggle to pay suppliers this week.

Read in:Chapter 22
Economics

Literacy rate

The percentage of people who can read and write at a specified level.

Example: A high literacy rate suggests broad access to basic education.

Read in:Chapter 35
Edexcel Business

Living wage

Pay intended to cover reasonable everyday living costs, often distinct from a legal minimum wage.

Example: An employer voluntarily pays a higher living-wage rate.

Read in:Chapter 19
AS & A Level Economics

Loanable funds

Funds available for lending, supplied by savers and demanded by borrowers.

Example: Higher household saving can increase funds available for investment.

Read in:Chapter 27
Computer Science

Local area network

A network covering a small location such as a school.

Example: Computers in one computer lab use a LAN.

Read in:Topic 3.4
ICT

Local area network

A network covering a small area such as a building or school.

Example: Computers in one classroom share a LAN.

Read in:Chapter 4
Business Studies

Localisation

Changing a product or marketing message to suit a particular country or culture.

Example: A restaurant offers different meals in different countries.

Read in:Chapter 17
Business Studies

Location decision

Choosing where a business should operate.

Example: A café chooses a busy street near customers.

Read in:Chapter 21
Mathematics

Locus

The collection of points that satisfy a particular distance or position rule.

Example: Points 3 cm from a fixed point form a circle.

Read in:Chapter 33
Computer Science

Logic circuit

A combination of logic gates connected to produce an output.

Example: Two gates combine door and movement signals.

Computer Science

Logic error

A mistake that makes a program give the wrong result even if it runs.

Example: Using + instead of × produces an incorrect total.

Read in:Topic 7.8
Computer Science

Logic expression

A formula showing the Boolean operations in a logic circuit.

Example: Q = (A AND B) OR C is a logic expression.

Read in:Topic 10.3
Computer Science

Logic gate

An electronic circuit that performs a Boolean operation.

Example: An AND gate outputs 1 only when both inputs are 1.

Computer Science

Logical shift

Moving all bits left or right and filling the empty positions with zeroes.

Example: Shifting 00001010 left once gives 00010100.

Read in:Topic 1.1
Edexcel Business

Logistics

Planning and managing the movement and storage of goods.

Example: A delivery firm organises vehicles and warehouse space.

Read in:Chapter 38
AS & A Level Economics

Long run

A period long enough for all factors of production to change.

Example: A café can lease a larger building and buy more ovens.

AS & A Level Economics

Long-run aggregate supply

The economy's sustainable productive capacity when input prices have adjusted.

Example: Better education and technology can shift LRAS to the right.

AS & A Level Economics

Long-run average cost

The lowest average production cost possible when every input can vary.

Example: A larger factory may reduce LRAC through economies of scale.

AS & A Level Economics

Long-run Phillips curve

A model in which unemployment returns to its natural rate regardless of steady inflation.

Example: Higher inflation alone does not permanently keep unemployment below its natural rate.

Read in:Chapter 28
AS & A Level Economics

Long-run productive capacity

The maximum level of output an economy can sustain over time.

Example: Better roads and education can increase productive capacity.

Read in:Chapter 8
Economics

Long-run productive capacity

The maximum level of output an economy can sustain over time.

Example: Better roads and education can increase productive capacity.

Read in:Chapter 28
Edexcel Business

Long-term finance

Funding available for a number of years.

Example: A business takes a five-year loan to buy machinery.

Read in:Chapter 25
AS & A Level Economics

Long-term unemployment

Being without a job for an extended period, often at least a year.

Example: A worker who remains jobless for 14 months is long-term unemployed.

Computer Science

Loop

Instructions that run repeatedly.

Example: A loop asks for marks until all students are entered.

Read in:Topic 7.7
AS & A Level Economics

Lorenz curve

A curve showing how evenly or unevenly income or wealth is distributed.

Example: A curve further from the equality line indicates more inequality.

Accounting

Loss

The amount by which expenses exceed income for a period.

Example: Income of $900 and expenses of $1,100 give a $200 loss.

Edexcel Business

Loss

The amount by which expenses exceed income for a period.

Example: Income of $900 and expenses of $1,100 give a $200 loss.

Edexcel Business

Loss leader

A product deliberately sold at a very low price to attract customers who buy other items.

Example: A supermarket discounts bread to encourage shoppers to visit.

Read in:Chapter 37
Accounting

Loss on disposal

The amount by which an asset's net book value exceeds sale proceeds.

Example: An asset worth $900 in the books sells for $600, giving $300 loss.

Read in:Chapter 11
Computer Science

Lossless compression

Reducing file size without losing any of the original information.

Example: A ZIP file can be restored to exactly its original contents.

Read in:Topic 1.3
Computer Science

Lossy compression

Making a file smaller by permanently removing some detail.

Example: A heavily compressed photograph may lose fine detail.

Read in:Topic 1.3
Computer Science

Low-level language

A language close to the computer's machine instructions.

Example: Assembly language is a low-level language.

Read in:Topic 4.2
Mathematics

Lower bound

The smallest possible value consistent with a rounded measurement.

Example: A length of 8 cm to the nearest cm has lower bound 7.5 cm.

Read in:Chapter 10
Economics

Lower direct taxes

Reductions in taxes paid directly on income or profits.

Example: A cut in income tax raises some workers’ take-home pay.

Read in:Chapter 28
Accounting

Lower of cost and NRV

The rule that inventory is valued at whichever is lower: cost or net realisable value.

Example: An item costing $70 with NRV of $55 is valued at $55.

Read in:Chapter 14
Economics

Luxury good

A non-essential product that people may buy more of as income rises.

Example: Designer watches are often luxury goods.

Read in:Chapter 11

M Dictionary terms

ICT

MAC address

A hardware address used to identify a network interface on a local network.

Example: A switch learns which MAC addresses are on each port.

Read in:Chapter 4
Computer Science

Machine code

The binary instructions a particular processor can execute directly.

Example: A CPU runs machine-code instructions.

Read in:Topic 4.2
Computer Science

Machine learning

A type of AI in which a system learns patterns from data rather than only following fixed rules.

Example: An email filter learns which messages are spam.

Read in:Topic 6.3
Economics

Macroeconomic aims

Broad goals a government has for the whole economy.

Example: A government aims for low inflation and steady growth.

Read in:Chapter 25
AS & A Level Economics

Macroeconomic equilibrium

The overall price level and real output where aggregate demand equals aggregate supply.

Example: A rise in AD may increase both real output and the price level.

AS & A Level Economics

Macroeconomics

The study of the economy as a whole.

Example: Studying national inflation is macroeconomics.

Read in:Chapter 1
Economics

Macroeconomics

The study of the economy as a whole.

Example: Studying national inflation is macroeconomics.

Read in:Chapter 5
Computer Science

Magnetic storage

Storage that uses magnetised areas to represent data.

Example: A hard disk drive uses magnetic platters.

Read in:Topic 3.3
ICT

Magnetic storage

Storage that records data by magnetising a material.

Example: A hard disk drive stores data magnetically.

Read in:Chapter 3
ICT

Magnetic stripe reader

A device that reads information stored on the magnetic strip of a card.

Example: An access card is swiped through a reader.

Read in:Chapter 2
ICT

Magnetic tape

A long strip of magnetised material used mainly for backup and archiving.

Example: A company stores old backups on tape.

Read in:Chapter 3
Mathematics

Magnitude

The length or size of a vector.

Example: The vector (3,4) has magnitude 5.

Read in:Chapter 43
ICT

Mailing list

A group of email addresses used to send a message to several people.

Example: A school sends one notice to all parents.

Read in:Chapter 10
AS & A Level Business

Make-or-buy decision

Choosing between producing something internally and purchasing it from a supplier.

Example: A company decides whether to manufacture or buy components.

Read in:Topic 4.3
Computer Science

Malware

Software designed to cause harm or gain unwanted access.

Example: Ransomware is a type of malware.

Read in:Topic 5.3
ICT

Malware

Software designed to damage devices, steal data or interfere with normal use.

Example: A malicious download installs spyware.

Read in:Chapter 8
AS & A Level Business

Management

Planning, organising, directing and controlling resources to achieve objectives.

Example: A manager allocates staff to meet a delivery target.

Read in:Topic 2.3
AS & A Level Business

Management by objectives

Agreeing measurable targets with employees and reviewing progress.

Example: A manager and employee agree quarterly customer-service targets.

Edexcel Business

Managerial economies

Lower average costs gained by employing specialised managers as a business grows.

Example: A big business hires expert purchasing and HR managers.

Read in:Chapter 40
Edexcel Business

Managers

Employees responsible for coordinating people and resources to achieve goals.

Example: A shop manager organises shifts and stock.

Edexcel Business

Manufacturing

Making finished products by transforming materials or components.

Example: A factory turns steel into bicycles.

Accounting

Manufacturing account

An account showing the cost of making goods in a factory.

Example: It adds direct costs and factory overheads to find cost of production.

Read in:Chapter 19
Mathematics

Many-to-one function

A function in which different inputs can give the same output.

Example: For f(x)=x², both 2 and −2 give 4.

Read in:Chapter 30
Mathematics

Map scale

A ratio linking distances on a map to actual distances.

Example: On a 1:50,000 map, 1 cm represents 500 m.

Read in:Chapter 34
Accounting

Margin

Gross profit expressed as a percentage of sales revenue.

Example: Goods costing $80 sold for $100 have a 20% margin.

Read in:Chapter 20
AS & A Level Business

Margin of safety

Actual or planned output minus break-even output.

Example: If sales are 800 units and break-even is 600, margin of safety is 200 units.

Read in:Topic 5.4
Edexcel Business

Margin of safety

The amount sales are above the break-even level.

Example: If break-even is 100 units and sales are 140, margin of safety is 40.

Read in:Chapter 28
Business Studies

Margin of safety

The amount sales are above the break-even level.

Example: If break-even is 100 units and sales are 140, margin of safety is 40.

Read in:Chapter 19
AS & A Level Business

Marginal cost

The extra cost of producing one more unit.

Example: Making one extra sandwich costs $1.20.

Read in:Topic 5.4
AS & A Level Economics

Marginal cost

The extra cost of producing one more unit.

Example: Making an extra shirt costs an additional $4.

Economics

Marginal cost

The extra cost of producing one more unit.

Example: Making an extra shirt costs an additional $4.

Read in:Chapter 22
AS & A Level Economics

Marginal decision

A choice about the benefit and cost of one extra unit of an activity.

Example: A student studies one more hour if the expected benefit exceeds the cost.

Read in:Chapter 1
AS & A Level Economics

Marginal external benefit

The extra benefit received by other people from one additional unit of an activity.

Example: Vaccination benefits others by reducing disease transmission.

Read in:Chapter 16
AS & A Level Economics

Marginal external cost

The extra cost imposed on third parties by one additional unit of an activity.

Example: Extra factory output causes additional air pollution for nearby residents.

Read in:Chapter 16
AS & A Level Economics

Marginal physical product

The extra physical output obtained from one more worker.

Example: Hiring another packer increases daily output by 15 boxes.

Read in:Chapter 23
AS & A Level Economics

Marginal private benefit

The extra benefit enjoyed by the direct consumer of one more unit.

Example: The enjoyment gained from one extra cinema ticket is its MPB.

Read in:Chapter 16
AS & A Level Economics

Marginal private cost

The additional cost to a producer or consumer of one extra unit, excluding external costs.

Example: A firm's cost of making one more bottle is its MPC.

Read in:Chapter 16
AS & A Level Economics

Marginal product

The extra output made by employing one more unit of an input.

Example: Hiring one more worker increases output from 80 to 95 units, so MP is 15.

Read in:Chapter 17
AS & A Level Economics

Marginal propensity to consume

The share of extra income that households spend.

Example: Spending $80 of an extra $100 gives MPC of 0.8.

Read in:Chapter 24
AS & A Level Economics

Marginal propensity to save

The share of extra income households save.

Example: Saving $20 of an extra $100 gives MPS of 0.2.

Read in:Chapter 24
AS & A Level Economics

Marginal rate of substitution

The amount of one good a consumer will give up for one extra unit of another while equally satisfied.

Example: A buyer sacrifices two drinks for one extra sandwich without changing satisfaction.

Read in:Chapter 14
AS & A Level Economics

Marginal revenue

Extra revenue earned by selling one additional unit.

Example: Selling one more unit increases revenue from $200 to $214, so MR is $14.

AS & A Level Economics

Marginal revenue product

The extra revenue a firm earns from hiring one more worker.

Example: An added worker creates output worth $90, so MRP is $90.

Read in:Chapter 23
AS & A Level Economics

Marginal social benefit

The full extra benefit to society, including private and external benefits.

Example: MSB equals MPB plus MEB when positive externalities exist.

AS & A Level Economics

Marginal social cost

The full extra cost to society, including private and external costs.

Example: MSC equals MPC plus MEC for production with a negative externality.

AS & A Level Economics

Marginal utility

The extra satisfaction gained from consuming one more unit of a good.

Example: A second slice of pizza brings less added satisfaction than the first.

Read in:Chapter 14
Accounting

Mark-up

Gross profit expressed as a percentage of cost of sales.

Example: Goods costing $80 sold for $100 have 25% mark-up.

Read in:Chapter 20
Edexcel Business

Mark-up

Gross profit expressed as a percentage of cost of sales.

Example: Goods costing $80 sold for $100 have 25% mark-up.

AS & A Level Economics

Market

Where buyers and sellers interact to exchange goods or services.

Example: The market for mobile phones includes shops and online sellers.

Economics

Market

Where buyers and sellers interact to exchange goods or services.

Example: The market for mobile phones includes shops and online sellers.

Business Studies

Market

A group of buyers and sellers of a particular good or service.

Example: The local market for bicycles includes buyers and bicycle shops.

Edexcel Business

Market analysis

Studying market size, customers, rivals and trends to make business decisions.

Example: A café examines local demand before choosing a site.

Read in:Chapter 34
AS & A Level Business

Market capitalisation

The total market value of a company's issued shares.

Example: A company with 2 million shares priced at $3 has a market value of $6 million.

Read in:Topic 1.3
Economics

Market capitalisation

The total market value of all a company’s shares.

Example: If 1 million shares are worth $3 each, market capitalisation is $3 million.

Read in:Chapter 20
AS & A Level Economics

Market demand

The total amount all buyers in a market want at each price.

Example: Add together every household's demand for bread.

Economics

Market demand

The total amount all buyers in a market want at each price.

Example: Add together every household's demand for bread.

Read in:Chapter 7
AS & A Level Business

Market development

Selling existing products in new markets.

Example: A retailer opens outlets in another country.

Read in:Topic 6.2
AS & A Level Economics

Market economy

An economy where most resources are allocated through private buyers and sellers.

Example: Firms decide what to make based on consumer demand.

Read in:Chapter 1
Economics

Market economy

An economy where most resources are allocated through private buyers and sellers.

Example: Firms decide what to make based on consumer demand.

Read in:Chapter 13
AS & A Level Business

Market equilibrium

The price and quantity where demand and supply are equal.

Example: At $8, buyers demand the same number of units sellers offer.

Read in:Topic 3.1
AS & A Level Economics

Market equilibrium

The price and quantity at which demand equals supply.

Example: At $5, buyers want 100 items and sellers offer 100 items.

Economics

Market equilibrium

The price and quantity at which demand equals supply.

Example: At $5, buyers want 100 items and sellers offer 100 items.

AS & A Level Business

Market failure

When a market does not allocate resources in a way that is best for society.

Example: Pollution costs are ignored by a factory's selling price.

Read in:Topic 6.1
AS & A Level Economics

Market failure

When markets do not use resources in the way that is best for society.

Example: A factory may produce too much pollution because it does not pay the full social cost.

Economics

Market failure

When markets do not use resources in the way that is best for society.

Example: A factory may produce too much pollution because it does not pay the full social cost.

Read in:Chapter 14
Edexcel Business

Market gap

An unmet customer need that a business may be able to serve.

Example: A town has no affordable late-night grocery shop.

Read in:Chapter 33
AS & A Level Business

Market growth

The percentage increase in the size of a market over time.

Example: Sales across an industry rise from $10 million to $11 million, a 10% increase.

Read in:Topic 3.1
Edexcel Business

Market orientation

Developing products by starting with customers' needs and wants.

Example: A shoe firm designs shoes after asking customers what they want.

Read in:Chapter 34
Business Studies

Market orientation

Developing products by starting with customers' needs and wants.

Example: A shoe firm designs shoes after asking customers what they want.

AS & A Level Business

Market penetration

Growing sales of existing products in existing markets.

Example: A supermarket encourages current customers to buy more often.

Read in:Topic 6.2
AS & A Level Business

Market positioning

How a brand or product is presented relative to competitors in customers' minds.

Example: A watch brand positions itself as high-quality and premium.

Read in:Topic 8.1
AS & A Level Economics

Market price

The amount buyers pay and sellers receive for a product.

Example: The market price of bread rises after a poor harvest.

Economics

Market price

The amount buyers pay and sellers receive for a product.

Example: The market price of bread rises after a poor harvest.

Read in:Chapter 10
AS & A Level Business

Market research

Gathering and analysing information about customers, competitors and markets.

Example: A restaurant surveys customers before changing prices.

Read in:Topic 3.2
Edexcel Business

Market research

Collecting and analysing information about customers and markets.

Example: A shop surveys customers before introducing a new product.

Business Studies

Market research

Collecting and analysing information about customers and markets.

Example: A shop surveys customers before introducing a new product.

Edexcel Business

Market segment

A group of customers with similar needs or characteristics.

Example: Students seeking low-cost laptops form one market segment.

Read in:Chapter 35
AS & A Level Business

Market segmentation

Dividing customers into groups with similar needs or characteristics.

Example: A retailer groups customers by age and income.

Edexcel Business

Market segmentation

Dividing customers into groups with similar needs or characteristics.

Example: A retailer groups shoppers by age and income.

Read in:Chapter 35
Business Studies

Market segmentation

Dividing customers into groups with similar needs or characteristics.

Example: A retailer groups shoppers by age and income.

AS & A Level Business

Market share

The percentage of total market sales earned by a business.

Example: A company selling $2 million in a $10 million market has 20% share.

Read in:Topic 3.1
AS & A Level Economics

Market share

The percentage of total market sales made by one business.

Example: A firm selling 30 of 100 phones has a 30% market share.

Economics

Market share

The percentage of total market sales made by one business.

Example: A firm selling 30 of 100 phones has a 30% market share.

Edexcel Business

Market share

The percentage of total sales in a market made by one business.

Example: A brand selling 20 of every 100 phones has a 20% market share.

Business Studies

Market share

The percentage of total sales in a market made by one business.

Example: A brand selling 20 of every 100 phones has a 20% market share.

AS & A Level Business

Market size

Total sales in a particular market, measured by value or quantity.

Example: The domestic bicycle market sells 200,000 bikes annually.

Read in:Topic 3.1
AS & A Level Economics

Market structure

How a market is organised, including the number and size of sellers.

Example: A market with many small firms differs from one dominated by a single firm.

Economics

Market structure

How a market is organised, including the number and size of sellers.

Example: A market with many small firms differs from one dominated by a single firm.

Read in:Chapter 23
AS & A Level Economics

Market supply

The total quantity supplied by all sellers in a market at each price.

Example: Adding the output of all local bakeries gives market supply.

Accounting

Market value

The price an asset could fetch if sold in the market today.

Example: An old property may be worth more than its historic cost.

Read in:Chapter 25
Economics

Market-based policy

A policy that uses prices or incentives to change behaviour.

Example: A tax makes polluting production more expensive.

Read in:Chapter 15
AS & A Level Business

Marketing

Identifying customer needs and meeting them profitably through suitable products and services.

Example: A café studies what customers want before changing its menu.

Read in:Topic 3.1
Edexcel Business

Marketing

Finding out what customers need and meeting those needs profitably.

Example: A business researches what type of shoes customers want.

Business Studies

Marketing

Finding out what customers need and meeting those needs profitably.

Example: A business researches what type of shoes customers want.

AS & A Level Business

Marketing audit

A review of the marketing environment, performance and activities.

Example: A business studies its brand and competitors before revising its plan.

Read in:Topic 8.2
AS & A Level Business

Marketing budget

The amount of money allocated to marketing activities.

Example: A company sets aside $10,000 for a campaign.

Read in:Topic 8.2
Business Studies

Marketing budget

The amount a business plans to spend on marketing.

Example: A company sets aside $5,000 for advertising.

Read in:Chapter 15
Edexcel Business

Marketing department

The team responsible for understanding customers and promoting products.

Example: Marketing staff plan a new advertising campaign.

Read in:Chapter 24
Edexcel Business

Marketing economies

Lower average marketing costs when advertising expenses are spread across more sales.

Example: A nationwide campaign costs less per item for a large retailer.

Read in:Chapter 40
AS & A Level Business

Marketing mix

The combination of product, price, place and promotion used to meet marketing objectives.

Example: A shop chooses a new design, price, sales channel and adverts.

Read in:Topic 3.3
Edexcel Business

Marketing mix

The combination of product, price, place and promotion decisions.

Example: A café chooses what to sell, its prices, location and advertising.

Business Studies

Marketing mix

The combination of product, price, place and promotion decisions.

Example: A café chooses what to sell, its prices, location and advertising.

AS & A Level Business

Marketing objectives

Measurable targets for marketing activities.

Example: A business aims to gain 5% market share next year.

Read in:Topic 3.1
Business Studies

Marketing objectives

Specific results a business wants its marketing to achieve.

Example: A business aims to increase online sales by 15%.

Read in:Chapter 17
AS & A Level Business

Marketing performance indicator

A measure used to check whether marketing is meeting objectives.

Example: A business monitors conversion rate and market share.

Read in:Topic 8.2
AS & A Level Business

Marketing plan

A written plan explaining marketing objectives, strategies, resources and actions.

Example: A retailer plans target customers, adverts and a sales budget.

Read in:Topic 8.2
AS & A Level Business

Marketing strategy

The broad approach used to achieve marketing objectives.

Example: A firm focuses on selling premium products to high-income buyers.

Read in:Topic 8.2
Business Studies

Marketing strategy

A long-term plan for attracting customers and achieving marketing goals.

Example: A firm targets teenagers with affordable sportswear.

AS & A Level Economics

Marshall–Lerner condition

A condition under which depreciation improves the trade balance if the combined demand elasticities for exports and imports exceed one.

Example: A weaker currency may reduce a trade deficit when trade volumes respond sufficiently.

AS & A Level Business

Maslow's hierarchy of needs

A theory suggesting people seek to meet needs from basic needs to self-fulfilment.

Example: A worker may value security before promotion opportunities.

Read in:Topic 2.2
Business Studies

Maslow's hierarchy of needs

A theory suggesting people try to meet basic needs before higher-level needs.

Example: A worker may value job security before seeking recognition.

Read in:Chapter 6
Edexcel Business

Maslow’s hierarchy of needs

A theory suggesting people try to meet basic needs before higher-level needs.

Example: A worker may value job security before seeking recognition.

Read in:Chapter 21
Mathematics

Mass

The amount of matter in an object, often measured in grams or kilograms.

Example: A bag of rice may have mass 2 kg.

Read in:Chapter 39
AS & A Level Business

Mass customisation

Producing customised goods efficiently using standardised processes.

Example: A shoe website lets buyers choose colours before assembly.

Edexcel Business

Mass market

A large market where a product is aimed at many different customers.

Example: Standard bottled water is sold to a mass market.

Read in:Chapter 35
Business Studies

Mass market

A large market where a product is aimed at many different customers.

Example: Standard bottled water is sold to a mass market.

Read in:Chapter 10
Edexcel Business

Mass marketing

Selling and promoting a product to a broad range of customers.

Example: A large drinks company advertises to the general public.

Read in:Chapter 34
Accounting

Matching principle

Recording expenses in the same period as the income they helped earn.

Example: December wages are included in December's accounts even if paid later.

AS & A Level Economics

Material living standards

The goods and services people can afford.

Example: Higher real income may allow better housing.

Read in:Chapter 30
Economics

Material living standards

The goods and services people can afford.

Example: Higher real income may allow better housing.

Read in:Chapter 32
Accounting

Materiality principle

The idea that important information should be recorded and disclosed appropriately.

Example: A very small stationery item may be treated as an expense rather than an asset.

Read in:Chapter 26
AS & A Level Business

Matrix structure

A structure in which staff report to more than one manager, often by function and project.

Example: An engineer reports to a technical manager and a project manager.

Read in:Topic 7.1
Edexcel Business

Maturity

A product-life-cycle stage when sales are high but growth slows.

Example: Sales of a long-established brand remain steady.

Read in:Chapter 36
Computer Science

Maximum

The largest value in a set.

Example: The program finds the highest test score.

Read in:Topic 7.4
Mathematics

Maximum error

The largest possible difference allowed by the rounding precision.

Example: To the nearest centimetre, the maximum rounding error is 0.5 cm.

Read in:Chapter 10
AS & A Level Economics

Maximum price

A legal price ceiling above which sellers cannot charge.

Example: A cap on rent limits how much landlords may demand.

Read in:Chapter 5
Economics

Maximum price

A legal price ceiling above which sellers cannot charge.

Example: A cap on rent limits how much landlords may demand.

Read in:Chapter 15
AS & A Level Economics

Maximum price control

A legal price ceiling intended to keep a product affordable.

Example: A rent cap may reduce prices but create a housing shortage.

Read in:Chapter 21
Business Studies

Mechanisation

Using machinery to help people complete production tasks.

Example: A farmer uses a tractor rather than hand tools.

Read in:Chapter 18
Computer Science

Media access control address

A hardware network interface identifier used on local networks.

Example: A network card has a MAC address.

Read in:Topic 3.4
ICT

Media streaming

Playing audio or video while it is delivered over a network.

Example: A lesson video plays without needing the whole file first.

Read in:Chapter 6
AS & A Level Economics

Medium of exchange

Something accepted to pay for goods and services.

Example: Money lets a customer buy shoes without swapping other goods.

Read in:Chapter 27
Economics

Medium of exchange

Something accepted to pay for goods and services.

Example: Money lets a customer buy shoes without swapping other goods.

Read in:Chapter 16
Computer Science

Megabyte

A unit of data storage equal to one million bytes in decimal notation.

Example: A photograph might use several megabytes.

Read in:Topic 1.3
Computer Science

Memory address register

A register containing the memory address to access.

Example: The MAR points to the memory location being read.

Read in:Topic 3.1
ICT

Memory card

A removable storage card used in cameras and other devices.

Example: A digital camera stores photos on an SD card.

Read in:Chapter 3
Computer Science

Memory data register

A register holding data being transferred to or from memory.

Example: A fetched instruction may pass through the MDR.

Read in:Topic 3.1
Mathematics

Memory function

A calculator feature for storing and recalling a number.

Example: Store a subtotal and add it to the next calculation.

Read in:Chapter 14
Edexcel Business

Mentoring

Support and guidance provided by a more experienced colleague.

Example: A senior employee helps a new recruit develop confidence.

Read in:Chapter 20
Edexcel Business

Merchandising

Displaying and presenting products to encourage sales.

Example: A shop places popular items near its entrance.

Read in:Chapter 39
AS & A Level Business

Merger

When two businesses combine into one organisation.

Example: Two regional banks agree to combine.

Read in:Topic 1.3
Business Studies

Merger

When two businesses agree to join together as one.

Example: Two local delivery firms combine into one company.

Read in:Chapter 3
AS & A Level Economics

Merit good

A product that benefits people and may be under-consumed in a free market.

Example: Education is a merit good.

Read in:Chapter 5
Economics

Merit good

A product that benefits people and may be under-consumed in a free market.

Example: Education is a merit good.

Read in:Chapter 14
Mathematics

Metric system

A measurement system using units such as metres, grams and litres.

Example: 1 metre = 100 centimetres.

Read in:Chapter 39
AS & A Level Economics

Microeconomics

The study of individual households, firms and particular markets.

Example: Studying the market for rice is microeconomics.

Read in:Chapter 1
Economics

Microeconomics

The study of individual households, firms and particular markets.

Example: Studying the market for rice is microeconomics.

Read in:Chapter 5
AS & A Level Business

Microfinance

Small loans and financial services for people or firms that may lack ordinary bank access.

Example: A small trader takes a microloan to buy stock.

Read in:Topic 5.2
ICT

Microphone

An input device that converts sound into a digital recording.

Example: A learner records a voice message with a microphone.

Read in:Chapter 2
Computer Science

Microprocessor

A programmable chip that carries out instructions.

Example: A traffic controller uses a microprocessor.

Read in:Topic 6.1
ICT

Microprocessor-controlled device

A machine that uses a small processor to monitor inputs and control what happens.

Example: A washing machine follows a selected wash program.

Read in:Chapter 5
Mathematics

Midnight

The start of a new calendar day at 00:00.

Example: 00:00 on Tuesday comes immediately after Monday night.

Read in:Chapter 15
Mathematics

Midpoint

The point halfway between two endpoints of a line segment.

Example: The midpoint of (0,0) and (4,6) is (2,3).

Read in:Chapter 31
AS & A Level Economics

Migration

People moving from one place to live in another.

Example: A worker moves abroad for a new job.

Economics

Migration

People moving from one place to live in another.

Example: A worker moves abroad for a new job.

Read in:Chapter 34
Computer Science

Minimum

The smallest value in a set.

Example: The program finds the lowest temperature.

Read in:Topic 7.4
AS & A Level Business

Minimum efficient scale

The lowest output level at which a firm can achieve long-run minimum average cost.

Example: A factory reaches its lowest unit costs at about 20,000 units.

Read in:Topic 9.1
AS & A Level Economics

Minimum price

A legal price floor below which sellers cannot charge.

Example: A minimum selling price may be set for an alcoholic drink.

Read in:Chapter 5
Economics

Minimum price

A legal price floor below which sellers cannot charge.

Example: A minimum selling price may be set for an alcoholic drink.

Read in:Chapter 15
Edexcel Business

Minimum wage

The lowest hourly pay an employer is legally allowed to give eligible workers.

Example: A café must pay staff at least the applicable legal rate.

Read in:Chapter 19
AS & A Level Economics

Minimum wage legislation

A law setting the lowest hourly pay employers may legally offer.

Example: A statutory minimum wage raises pay for some low-paid workers.

Read in:Chapter 23
AS & A Level Business

Mintzberg's management roles

A framework describing managers' interpersonal, information and decision-making activities.

Example: A manager shares information and negotiates with suppliers.

Read in:Topic 2.3
Accounting

Missing credit purchases

The value of credit purchases calculated using supplier balances and other records.

Example: Supplier balances help reconstruct unrecorded purchases.

Read in:Chapter 20
Accounting

Missing credit sales

The value of credit sales calculated from customer balances and other records.

Example: The receivables account can reveal sales not directly recorded.

Read in:Chapter 20
AS & A Level Business

Mission statement

A short explanation of an organisation's main purpose and values.

Example: A charity's mission is to provide affordable meals.

Read in:Topic 1.4
AS & A Level Economics

Mixed economy

An economy using both private businesses and government involvement.

Example: Private shops operate alongside public hospitals.

Read in:Chapter 5
Economics

Mixed economy

An economy using both private businesses and government involvement.

Example: Private shops operate alongside public hospitals.

Business Studies

Mixed economy

An economy with both private businesses and government-owned organisations.

Example: Private shops operate alongside public hospitals.

Read in:Chapter 2
Mathematics

Mixed number

A whole number written together with a fraction.

Example: 2 1/2 is a mixed number.

Read in:Chapter 4
Computer Science

Module

A separate part of a program with a defined task.

Example: A login module checks usernames and passwords.

Read in:Topic 7.2
ICT

Module testing

Testing a small part of a system before checking the whole system.

Example: A login module is tested on its own.

Read in:Chapter 7
AS & A Level Business

Monetary policy

Central bank decisions about interest rates and money conditions to influence the economy.

Example: The central bank raises rates to reduce inflation.

Read in:Topic 6.1
AS & A Level Economics

Monetary policy

Central-bank decisions about interest rates and money conditions to influence the economy.

Example: A central bank cuts interest rates to encourage borrowing.

Economics

Monetary policy

Central-bank decisions about interest rates and money conditions to influence the economy.

Example: A central bank cuts interest rates to encourage borrowing.

Read in:Chapter 27
Edexcel Business

Monetary policy

Policies, especially interest-rate changes, used to influence borrowing, spending and inflation.

Example: A central bank raises interest rates to help reduce inflation.

Read in:Chapter 12
Business Studies

Monetary policy

Policies, especially interest-rate changes, used to influence borrowing, spending and inflation.

Example: A central bank raises interest rates to help reduce inflation.

Read in:Chapter 27
AS & A Level Economics

Monetary union

Countries sharing a currency or common monetary authority.

Example: Euro-area members use the euro and a shared central bank.

Read in:Chapter 32
AS & A Level Economics

Money

Anything widely accepted as payment for goods, services and debts.

Example: A customer pays with banknotes or a debit card.

Economics

Money

Anything widely accepted as payment for goods, services and debts.

Example: A customer pays with banknotes or a debit card.

Read in:Chapter 16
Accounting

Money measurement principle

Only items that can be measured reliably in money are recorded in the accounts.

Example: A building's cost is recorded, but staff enthusiasm is not shown as an asset.

Read in:Chapter 26
AS & A Level Economics

Money multiplier

A model showing the potential expansion of deposits from an initial increase in banking reserves.

Example: With a 10% required reserve ratio, the simple multiplier is 10.

Read in:Chapter 27
AS & A Level Economics

Money supply

The amount of money available in an economy.

Example: More bank deposits may increase the money supply.

Economics

Money supply

The amount of money available in an economy.

Example: More bank deposits may increase the money supply.

Read in:Chapter 27
ICT

Monitor

A display screen that shows computer output.

Example: A monitor shows the results of a spreadsheet.

Read in:Chapter 2
Computer Science

Monitoring system

A system that measures conditions and reports them without necessarily changing them.

Example: A weather station records temperature.

Read in:Topic 6.1
ICT

Monitoring system

A system that collects measurements so people can check conditions.

Example: Sensors record a greenhouse's temperature over time.

Read in:Chapter 5
AS & A Level Economics

Monopolistic competition

A market with many firms selling differentiated products and relatively easy entry.

Example: Several cafés compete using different menus and atmospheres.

AS & A Level Economics

Monopoly

A market where one supplier dominates or is the only seller.

Example: A sole local water supplier may have monopoly power.

Economics

Monopoly

A market where one supplier dominates or is the only seller.

Example: A sole local water supplier may have monopoly power.

Read in:Chapter 23
AS & A Level Economics

Monopsony

A labour market where there is one dominant buyer of labour.

Example: A single large employer in a town may influence local wages.

AS & A Level Economics

Moral hazard

When protection from a loss encourages someone to take extra risks.

Example: A fully insured driver might take less care while parking.

AS & A Level Economics

Mortgage

A long-term loan usually used to buy property.

Example: A family takes out a mortgage to purchase a home.

Read in:Chapter 27
Economics

Mortgage

A long-term loan usually used to buy property.

Example: A family takes out a mortgage to purchase a home.

Read in:Chapter 17
Edexcel Business

Mortgage

A long-term loan usually used to buy property.

Example: A family takes out a mortgage to purchase a home.

Read in:Chapter 25
Computer Science

Most significant bit

The bit with the highest place value, at the left of a binary number.

Example: In 1001, the leftmost 1 is the most significant bit.

Read in:Topic 1.1
ICT

Motherboard

The main circuit board connecting computer components.

Example: The CPU and RAM connect to the motherboard.

Read in:Chapter 1
AS & A Level Business

Motivation

The desire or willingness that encourages someone to work towards a goal.

Example: Recognition encourages an employee to improve performance.

Read in:Topic 2.2
Edexcel Business

Motivation

The reasons that make employees want to work well.

Example: Recognition and fair pay can improve motivation.

Business Studies

Motivation

The reasons that make employees want to work well.

Example: Recognition and fair pay can improve motivation.

AS & A Level Business

Motivator

In Herzberg's theory, something such as achievement or recognition that can improve job satisfaction.

Example: An employee feels motivated by responsibility for a project.

Read in:Topic 2.2
ICT

Mouse

A pointing device used to control a cursor on a screen.

Example: A user clicks an icon using a mouse.

Read in:Chapter 2
AS & A Level Economics

Movement along the demand curve

A change in quantity demanded caused only by a change in the product's price.

Example: A lower price moves buyers to another point on the same curve.

Read in:Chapter 23
Economics

Movement along the demand curve

A change in quantity demanded caused only by a change in the product's price.

Example: A lower price moves buyers to another point on the same curve.

Read in:Chapter 7
Economics

Movement along the supply curve

A change in quantity supplied caused only by a change in price.

Example: A rise in price moves a seller along the same curve.

Read in:Chapter 8
Edexcel Business

Multi-skilling

Training workers to carry out more than one type of task.

Example: A hotel worker can help with both reception and reservations.

Read in:Chapter 42
AS & A Level Economics

Multidimensional Poverty Index

A measure of poverty based on several deprivations such as health, education and living standards.

Example: A household may be poor because it lacks clean water and schooling.

Read in:Chapter 30
ICT

Multimedia

Content that combines text, pictures, sound, animation or video.

Example: A presentation includes narration and diagrams.

Read in:Chapter 9
ICT

Multimedia presentation

A presentation that combines text with media such as images, sound or video.

Example: A history slideshow uses pictures and narration.

Read in:Chapter 6
AS & A Level Business

Multinational business

A business with operations in more than one country.

Example: A manufacturer produces goods in several countries.

Read in:Topic 1.1
Business Studies

Multinational business

A business that operates in more than one country.

Example: A company owns factories in several countries.

Read in:Chapter 29
AS & A Level Business

Multinational company

A business that operates in more than one country.

Example: A clothing firm has factories in three countries.

Read in:Topic 6.1
AS & A Level Economics

Multinational company

A business that operates in more than one country.

Example: A carmaker has factories in several countries.

Read in:Chapter 31
Economics

Multinational company

A business that operates in more than one country.

Example: A carmaker has factories in several countries.

Read in:Chapter 20
Edexcel Business

Multinational company

A business that operates in more than one country.

Example: A clothing firm has factories in three countries.

Economics

Multinational corporation

A business operating in more than one country.

Example: A manufacturer has branches and factories worldwide.

Read in:Chapter 37
Edexcel Business

Multinational corporation

A business operating in more than one country.

Example: A manufacturer has branches and factories worldwide.

Read in:Chapter 4
Mathematics

Multiple

A number found by multiplying another number by a whole number.

Example: 18 is a multiple of 6.

Read in:Chapter 1
Mathematics

Multiplication

Finding a total from equal groups or scaling a number.

Example: 4 groups of 3 contain 12 items.

Read in:Chapter 6
AS & A Level Economics

Multiplier

The total change in national income divided by the initial change in autonomous spending.

Example: With MPC of 0.8 and no extra leakages, the simple multiplier is 5.

Mathematics

Multiplier

A number used to increase or decrease an amount by a percentage.

Example: Increase by 15% using a multiplier of 1.15.

Read in:Chapter 13
Computer Science

Multitasking

Making progress on several programs by sharing processor time.

Example: You listen to music while typing a report.

Read in:Topic 4.1
Mathematics

Mutually exclusive

Events that cannot happen at the same time in one trial.

Example: On one die roll, getting a 2 and getting a 5 are mutually exclusive.

Read in:Chapter 44

N Dictionary terms

Computer Science

NAND gate

A gate that gives the opposite output of AND.

Example: 1 NAND 1 gives 0.

Read in:Topic 10.2
AS & A Level Economics

Narrow money

Money that can be spent quickly, such as cash and some immediately available deposits.

Example: Cash held by the public is part of narrow money.

Read in:Chapter 27
AS & A Level Economics

National debt

The total outstanding money borrowed by a government over time.

Example: Repeated budget deficits can increase national debt.

Read in:Chapter 11
AS & A Level Business

Nationalisation

Bringing a privately owned business or industry under state ownership.

Example: A government takes control of a railway operator.

Read in:Topic 6.1
AS & A Level Economics

Nationalisation

Transferring a business or industry into state ownership.

Example: The government takes ownership of a railway company.

Read in:Chapter 21
Economics

Nationalisation

Transferring a business or industry into state ownership.

Example: The government takes ownership of a railway company.

Read in:Chapter 15
AS & A Level Economics

Natural increase

Population growth when births exceed deaths, excluding migration.

Example: More births than deaths lead to natural increase.

Read in:Chapter 30
Economics

Natural increase

Population growth when births exceed deaths, excluding migration.

Example: More births than deaths lead to natural increase.

Read in:Chapter 34
Computer Science

Natural language processing

Technology that helps computers work with human language.

Example: A chatbot interprets a student's typed question.

Read in:Topic 6.3
AS & A Level Economics

Natural monopoly

A market where one supplier can serve demand at lower cost than multiple suppliers.

Example: One water-pipe network is usually cheaper than two competing networks.

Edexcel Business

Natural monopoly

A market where one supplier can serve demand at lower cost than multiple suppliers.

Example: One water-pipe network is usually cheaper than two competing networks.

Read in:Chapter 5
Mathematics

Natural number

A counting number such as 1, 2 or 3.

Example: There are 6 natural numbers from 1 to 6.

Read in:Chapter 1
AS & A Level Economics

Natural rate of unemployment

The unemployment rate remaining when the economy is at sustainable output.

Example: Frictional and structural unemployment may remain during full employment.

AS & A Level Economics

Natural unemployment

Unemployment remaining after cyclical unemployment has been eliminated.

Example: People between jobs contribute to natural unemployment.

Read in:Chapter 26
ICT

Near-field communication

Very short-range wireless technology used for contactless exchange of data.

Example: A customer taps a phone to pay.

Read in:Chapter 6
AS & A Level Economics

Necessity

A product people need and may keep buying when its price rises.

Example: Basic medicine is often treated as a necessity.

Read in:Chapter 3
Economics

Necessity

A product people need and may keep buying when its price rises.

Example: Basic medicine is often treated as a necessity.

Read in:Chapter 11
AS & A Level Economics

Need

Something essential for living, such as food, water or shelter.

Example: Clean drinking water is a need.

Read in:Chapter 26
Economics

Need

Something essential for living, such as food, water or shelter.

Example: Clean drinking water is a need.

Read in:Chapter 1
Edexcel Business

Needs

Things people must have to live, such as food, water and shelter.

Example: Clean drinking water is a basic need.

Business Studies

Needs

Things people must have to live, such as food, water and shelter.

Example: Clean drinking water is a basic need.

AS & A Level Economics

Negative externality

A harmful effect on others not fully reflected in the market price.

Example: Smoke from a factory harms nearby households.

Read in:Chapter 21
Economics

Negative externality

A harmful effect on others not fully reflected in the market price.

Example: Smoke from a factory harms nearby households.

Read in:Chapter 14
AS & A Level Economics

Negative income tax

A scheme where low earners receive a payment rather than pay income tax.

Example: Someone earning below a threshold receives a government top-up.

Read in:Chapter 22
Mathematics

Negative index

A raised number below zero, representing a reciprocal power.

Example: 10⁻² = 0.01.

Mathematics

Negative number

A number less than zero.

Example: −5°C is a negative temperature.

Read in:Chapter 5
AS & A Level Economics

Negative output gap

When actual real GDP is below sustainable potential GDP.

Example: Idle factories and higher unemployment signal a negative gap.

Computer Science

Nested iteration

Repeating one loop inside another, often to process rows and columns.

Example: An outer loop visits rows while the inner loop visits cells.

Read in:Topic 8.2
Computer Science

Nested loop

A loop placed inside another loop.

Example: Two nested loops print a grid of stars.

Read in:Topic 7.9
Edexcel Business

Net assets

Total assets minus total liabilities of a business.

Example: If assets are £100,000 and liabilities £65,000, net assets are £35,000.

Read in:Chapter 30
Accounting

Net book value

An asset's cost less its accumulated depreciation.

Example: A $4,000 machine with $1,500 depreciation has a net book value of $2,500.

Read in:Chapter 11
AS & A Level Business

Net cash flow

Total cash inflows minus total cash outflows in a period.

Example: Inflows of $9,000 and outflows of $7,000 give net cash flow of $2,000.

Read in:Topic 5.3
Edexcel Business

Net cash flow

Total cash inflows minus total cash outflows in a period.

Example: Inflows of $9,000 and outflows of $7,000 give net cash flow of $2,000.

Read in:Chapter 26
Edexcel Business

Net current assets

Current assets minus current liabilities; also called working capital.

Example: £9,000 current assets less £4,000 current liabilities gives £5,000.

Read in:Chapter 30
AS & A Level Business

Net present value

The present value of future net cash flows minus the initial investment.

Example: A project with $15,000 present-value inflows and $12,000 cost has NPV of $3,000.

Read in:Topic 10.3
Edexcel Business

Net profit

Profit remaining after the relevant expenses have been deducted.

Example: A café has $500 gross profit and $200 expenses, leaving $300 net profit.

Read in:Chapter 29
Business Studies

Net profit

Profit remaining after the relevant expenses have been deducted.

Example: A café has $500 gross profit and $200 expenses, leaving $300 net profit.

Business Studies

Net profit margin

Net profit expressed as a percentage of revenue.

Example: $100 net profit on $1,000 revenue means a 10% margin.

Read in:Chapter 26
Accounting

Net realisable value

The estimated selling price of inventory minus costs needed to finish and sell it.

Example: An item selling for $90 with $10 selling costs has an NRV of $80.

Read in:Chapter 14
ICT

Netiquette

Rules for polite and respectful behaviour when communicating online.

Example: A student avoids writing messages entirely in capital letters.

Read in:Chapter 10
Computer Science

Network interface card

Hardware that allows a computer to connect to a network.

Example: An Ethernet adapter is a NIC.

Read in:Topic 3.4
ICT

Network interface card

Hardware that connects a computer to a network.

Example: A wired NIC connects a desktop to a network cable.

Read in:Chapter 4
Computer Science

Network protocol

An agreed set of rules for devices to communicate.

Example: TCP and IP are network protocols.

Read in:Topic 3.4
AS & A Level Business

New product development

The process of turning an idea into a product ready for sale.

Example: A firm tests a new smartwatch before launching it.

Read in:Topic 8.1
Economics

Next best alternative

The second-choice option you give up when choosing something else.

Example: Choosing a concert means missing your favourite team's match.

Read in:Chapter 3
Computer Science

Nibble

A group of four bits.

Example: The binary value 1011 is one nibble.

Read in:Topic 1.1
Edexcel Business

Niche market

A small, specialised part of a larger market.

Example: Clothing made for professional cyclists serves a niche market.

Read in:Chapter 35
Business Studies

Niche market

A small, specialised part of a larger market.

Example: Clothing made for professional cyclists serves a niche market.

Read in:Chapter 10
Edexcel Business

Niche marketing

Targeting a relatively small group with specific needs.

Example: A shop sells specialist climbing equipment to enthusiasts.

Read in:Chapter 34
AS & A Level Economics

Nominal GDP

GDP measured using prices from the current year, without removing inflation.

Example: Nominal GDP rises partly because prices rise.

Economics

Nominal GDP

GDP measured using prices from the current year, without removing inflation.

Example: Nominal GDP rises partly because prices rise.

Read in:Chapter 29
Accounting

Non-current asset

An asset the business plans to use for more than one accounting period.

Example: Machinery used for several years is a non-current asset.

Read in:Chapter 2
AS & A Level Business

Non-current asset

An asset a business expects to use for more than one year.

Example: Machinery is usually a non-current asset.

Edexcel Business

Non-current assets

Long-term assets used in a business.

Example: Equipment and buildings are non-current assets.

Read in:Chapter 30
Business Studies

Non-current assets

Long-term assets used in a business.

Example: Equipment and buildings are non-current assets.

Read in:Chapter 25
Edexcel Business

Non-current liabilities

Amounts a business owes that are generally payable after more than one year.

Example: A five-year bank loan is a non-current liability.

Read in:Chapter 30
Business Studies

Non-current liabilities

Amounts a business owes that are generally payable after more than one year.

Example: A five-year bank loan is a non-current liability.

Read in:Chapter 25
Accounting

Non-current liability

A debt that is not due to be settled within the next year.

Example: A five-year loan is a non-current liability.

Read in:Chapter 2
AS & A Level Business

Non-current liability

A debt generally due more than one year later.

Example: A five-year bank loan is a non-current liability.

Read in:Topic 10.1
Accounting

Non-financial information

Useful information about a business that is not expressed directly in money.

Example: Customer satisfaction and staff morale are non-financial information.

Read in:Chapter 25
Edexcel Business

Non-financial motivation

Encouraging employees through methods other than extra pay.

Example: A business offers recognition and meaningful responsibilities.

Read in:Chapter 22
Edexcel Business

Non-financial objectives

Business goals not measured mainly in money.

Example: A company aims to reduce waste or improve customer service.

Read in:Chapter 2
Computer Science

Non-volatile memory

Memory that keeps its contents when power is removed.

Example: Flash storage is non-volatile.

Read in:Topic 3.3
ICT

Non-volatile memory

Memory that retains information when the power is turned off.

Example: ROM and SSDs are non-volatile.

Read in:Chapter 1
Economics

Non-wage benefit

A reward from a job other than direct pay.

Example: Health insurance or flexible hours are non-wage benefits.

Read in:Chapter 18
Computer Science

NOR gate

A gate that gives the opposite output of OR.

Example: 0 NOR 0 gives 1.

Read in:Topic 10.2
AS & A Level Business

Normal good

A good for which demand generally rises when income rises.

Example: Households buy more restaurant meals as incomes increase.

Read in:Topic 8.1
AS & A Level Economics

Normal good

A product people tend to buy more of when their income rises.

Example: A family buys more restaurant meals as its income grows.

Economics

Normal good

A product people tend to buy more of when their income rises.

Example: A family buys more restaurant meals as its income grows.

Read in:Chapter 10
AS & A Level Economics

Normal profit

The minimum profit needed to keep an entrepreneur's resources in their current use.

Example: A firm earning normal profit covers all economic costs, including opportunity costs.

Computer Science

Normal test data

Typical valid values a system should accept.

Example: Age 15 is normal data for a school admissions form.

Read in:Topic 7.6
ICT

Normal test data

Valid data that should be accepted by a system.

Example: Age 15 is normal data when the allowed range is 11–18.

Read in:Chapter 7
Mathematics

Normalise

To rewrite an answer so the number before the power of ten is at least 1 but less than 10.

Example: 32 × 10³ normalises to 3.2 × 10⁴.

Read in:Chapter 8
AS & A Level Economics

Normative statement

A claim expressing a value judgement about what should happen.

Example: “The government should increase the minimum wage” is normative.

Read in:Chapter 1
Mathematics

North line

A line pointing to north, used as a reference for bearings.

Example: Draw a north arrow at the starting point.

Read in:Chapter 34
Computer Science

NOT gate

A gate that reverses its single input.

Example: NOT 1 gives 0.

Read in:Topic 10.2
Mathematics

Nth term

A formula giving the value of a sequence at position n.

Example: The nth term of 2, 4, 6, … is 2n.

Read in:Chapter 25
Mathematics

Number line

A straight line that shows numbers in order and at equal intervals.

Example: −1 sits to the left of 0 on a number line.

Read in:Chapter 5
Economics

Number of employees

How many people work for a business.

Example: A restaurant with 12 staff members has 12 employees.

Read in:Chapter 20
Mathematics

Numerator

The top number in a fraction; it tells how many parts are chosen.

Example: In 3/8, the numerator is 3.

Read in:Chapter 4
ICT

Numeric keypad

A small group of number keys used for fast number entry.

Example: A cashier enters prices using a numeric keypad.

Read in:Chapter 2
Mathematics

Numerical data

Information recorded as numbers that represent quantities.

Example: Heights in centimetres are numerical data.

Read in:Chapter 45

O Dictionary terms

Accounting

Objectivity principle

Basing accounting records on evidence rather than personal opinion.

Example: An invoice supports the cost recorded for equipment.

Read in:Chapter 26
Edexcel Business

Observation

Watching people carry out tasks to learn how an existing system works.

Example: An analyst watches how a cashier enters sales.

Read in:Chapter 33
ICT

Observation

Watching people carry out tasks to learn how an existing system works.

Example: An analyst watches how a cashier enters sales.

Read in:Chapter 7
Mathematics

Obtuse angle

An angle bigger than 90° but smaller than 180°.

Example: 120° is obtuse.

Read in:Chapter 32
AS & A Level Economics

Occupational mobility

How easily a worker can change jobs.

Example: Retraining allows a cashier to become a technician.

Read in:Chapter 23
Economics

Occupational mobility

How easily a worker can change jobs.

Example: Retraining allows a cashier to become a technician.

Computer Science

Odd parity

A parity rule that makes the total number of 1 bits odd.

Example: Four 1s need an extra 1 for odd parity.

Read in:Topic 2.2
Edexcel Business

Off-the-job training

Learning away from normal work tasks, often in a classroom or course.

Example: Employees attend a computer course at a training centre.

Read in:Chapter 20
Business Studies

Off-the-job training

Learning away from normal work tasks, often in a classroom or course.

Example: Employees attend a computer course at a training centre.

Read in:Chapter 8
AS & A Level Economics

Official development assistance

Government aid aimed mainly at supporting economic development and welfare.

Example: A donor funds clean-water projects in a low-income country.

Read in:Chapter 31
AS & A Level Business

Offshoring

Moving business activities to another country.

Example: A firm transfers its customer-support operation abroad.

Read in:Topic 9.1
Edexcel Business

Offshoring

Moving business activities to another country.

Example: A firm transfers its customer-support operation abroad.

Read in:Chapter 9
AS & A Level Economics

Oligopoly

A market dominated by a small number of large firms whose decisions affect one another.

Example: A few major airlines watch each other's fares.

Edexcel Business

On-the-job training

Learning while doing the job, usually with help from an experienced worker.

Example: A trainee chef learns by working alongside a senior chef.

Read in:Chapter 20
Business Studies

On-the-job training

Learning while doing the job, usually with help from an experienced worker.

Example: A trainee chef learns by working alongside a senior chef.

Read in:Chapter 8
Computer Science

One-dimensional array

An array that stores a single list of values.

Example: scores holds the marks for one class.

Read in:Topic 8.2
AS & A Level Business

One-way communication

Information sent without an immediate opportunity to respond.

Example: A manager puts a notice on a staff board.

Read in:Topic 7.2
Business Studies

One-way communication

A message sent without expecting a reply.

Example: A noticeboard announces new opening hours.

Read in:Chapter 9
ICT

Online booking system

A service that checks availability and records reservations electronically.

Example: A cinema website lets customers select seats.

Read in:Chapter 6
ICT

Online forum

A website where people post and reply to discussions.

Example: Students ask questions in a course forum.

Read in:Chapter 10
Edexcel Business

Online retailer

A business that sells goods or services to customers over the internet.

Example: An online bookstore delivers orders to homes.

AS & A Level Business

Opening balance

Cash available at the beginning of a period.

Example: A shop starts January with $1,500.

Read in:Topic 5.3
Edexcel Business

Opening balance

Cash available at the beginning of a period.

Example: A shop starts January with $1,500.

Read in:Chapter 26
Accounting

Opening capital

The owner's capital at the beginning of the accounting period.

Example: Last January the owner had $8,000 invested in the business.

Read in:Chapter 20
Accounting

Opening inventory

Inventory held at the beginning of an accounting period.

Example: A shop starts January with $600 of stock.

Read in:Chapter 6
Edexcel Business

Operating expenses

Costs of day-to-day business activities other than cost of sales.

Example: Rent and office salaries are operating expenses.

Read in:Chapter 29
AS & A Level Business

Operating profit

Profit from normal operations before interest and tax, depending on presentation.

Example: A firm's operating profit is $8,000 after operating expenses.

Read in:Topic 10.1
Edexcel Business

Operating profit

Profit from normal operations before interest and tax, depending on presentation.

Example: A firm's operating profit is $8,000 after operating expenses.

Read in:Chapter 29
AS & A Level Business

Operating profit margin

Operating profit as a percentage of revenue.

Example: A $10,000 operating profit on $100,000 sales gives 10%.

Read in:Topic 10.2
Edexcel Business

Operating profit margin

Operating profit as a percentage of revenue.

Example: A $10,000 operating profit on $100,000 sales gives 10%.

Read in:Chapter 31
Computer Science

Operating system

Software that manages hardware, files, memory and running programs.

Example: An operating system lets you open several applications.

Read in:Topic 4.1
ICT

Operating system

Software that controls hardware and provides services for applications.

Example: Windows manages files and memory.

Read in:Chapter 1
AS & A Level Business

Operational flexibility

The ability to adjust output, timing or product features when needs change.

Example: A factory quickly switches from one model to another.

Read in:Topic 9.3
Edexcel Business

Operations department

The team responsible for producing goods or delivering services.

Example: Operations staff schedule factory output.

Read in:Chapter 24
AS & A Level Business

Operations management

Planning and controlling the activities that produce goods and services.

Example: A factory manager schedules machines and workers.

Read in:Topic 4.1
AS & A Level Business

Operations strategy

A long-term approach to organising production and delivery to meet business objectives.

Example: A manufacturer invests in faster machines to improve delivery.

Read in:Topic 9.3
Computer Science

Operator

A symbol or keyword used to carry out a calculation or comparison.

Example: + is an arithmetic operator.

Read in:Topic 8.1
AS & A Level Business

Opportunity cost

The next-best choice given up when a decision is made.

Example: Spending $2,000 on advertising means the business cannot use it for training.

AS & A Level Economics

Opportunity cost

The next best alternative given up when a choice is made.

Example: Buying a laptop means giving up the bicycle you otherwise would have bought.

Economics

Opportunity cost

The next best alternative given up when a choice is made.

Example: Buying a laptop means giving up the bicycle you otherwise would have bought.

Read in:Chapter 3
Edexcel Business

Opportunity cost

The next-best choice you give up when you make a decision.

Example: Buying a laptop means you cannot use the same money for a holiday.

Read in:Chapter 44
Business Studies

Opportunity cost

The next-best choice you give up when you make a decision.

Example: Buying a laptop means you cannot use the same money for a holiday.

Read in:Chapter 1
Computer Science

Optical character recognition

Software that converts images of printed text into editable characters.

Example: OCR converts a scanned letter into searchable text.

Read in:Topic 3.2
ICT

Optical character recognition

Technology that turns printed or scanned text into editable computer text.

Example: A scanned letter becomes editable text.

Read in:Chapter 2
Computer Science

Optical mark recognition

Technology that detects shaded or marked positions on a form.

Example: OMR reads answers on multiple-choice sheets.

Read in:Topic 3.2
ICT

Optical mark recognition

Technology that detects marked boxes or shaded answers on paper.

Example: A multiple-choice answer sheet is checked automatically.

Read in:Chapter 2
Computer Science

Optical storage

Storage read or written using a laser.

Example: A DVD is optical storage.

Read in:Topic 3.3
ICT

Optical storage

Storage that uses a laser to read data from a disc.

Example: DVDs are optical storage media.

Read in:Chapter 3
Computer Science

OR gate

A gate that outputs 1 when at least one input is 1.

Example: 1 OR 0 gives 1.

Read in:Topic 10.2
Mathematics

Order of operations

The agreed order for working out a calculation with different operations.

Example: Multiply before adding in 2 + 3 × 4, giving 14.

Read in:Chapter 6
Mathematics

Order of rotational symmetry

The number of times a shape matches itself during a full 360° turn.

Example: A square has order 4.

Read in:Chapter 36
Accounting

Ordinary share

A share that usually gives voting rights and dividends that can vary.

Example: An ordinary shareholder may receive a larger dividend when profits rise.

Read in:Chapter 17
AS & A Level Business

Organic growth

Growth by expanding a business's own activities, without buying another business.

Example: A retailer opens two new branches.

Read in:Topic 1.3
AS & A Level Economics

Organic growth

Growth achieved by expanding a firm's own activities rather than buying another firm.

Example: A retailer opens more branches using retained profits.

Read in:Chapter 20
Edexcel Business

Organisational culture

The shared values, behaviours and usual ways of working in a business.

Example: A company encourages staff to share ideas openly.

Read in:Chapter 17
AS & A Level Business

Organisational structure

How roles, authority and reporting relationships are arranged in a business.

Example: An organisation chart shows managers and their teams.

Read in:Topic 7.1
Edexcel Business

Organisational structure

The way jobs, responsibilities and authority are arranged in a business.

Example: A chart shows who reports to each manager.

Read in:Chapter 23
Business Studies

Organisational structure

The way roles, responsibilities and authority are arranged in a business.

Example: An organisation chart shows who reports to whom.

AS & A Level Business

Organising

Arranging people and resources so work can be completed.

Example: A manager assigns roles to a project team.

Read in:Topic 2.3
Mathematics

Outcome

A possible result of a random experiment.

Example: Rolling a 4 is one possible outcome of a die roll.

Read in:Chapter 44
Computer Science

Output

Information produced by a program or system.

Example: A program displays an average mark.

Read in:Topic 7.2
Edexcel Business

Output

Information produced by a program or system.

Example: A program displays an average mark.

AS & A Level Economics

Output approach

Measuring GDP by adding the value added by producers.

Example: A baker adds value to flour when producing and selling bread.

Read in:Chapter 6
Computer Science

Output device

Hardware that presents information from a computer.

Example: A monitor is an output device.

Read in:Topic 3.2
ICT

Output device

Hardware that presents information or carries out an action.

Example: A monitor displays text and pictures.

Read in:Chapter 1
AS & A Level Economics

Output gap

The difference between actual real GDP and the economy's potential output.

Example: Actual GDP below potential GDP creates a negative output gap.

Computer Science

Output signal

A value produced by a logic circuit, usually 0 or 1.

Example: The alarm activates when output Q is 1.

Read in:Topic 10.1
AS & A Level Business

Outsourcing

Paying another business to perform an activity instead of doing it in-house.

Example: A retailer hires a specialist company to handle deliveries.

Read in:Topic 4.3
Edexcel Business

Outsourcing

Paying another business to perform an activity instead of doing it in-house.

Example: A retailer hires a specialist company to handle deliveries.

Edexcel Business

Over-borrowing

Taking on more debt than a business can comfortably repay.

Example: A business's loan repayments become too high for its cash flow.

Read in:Chapter 15
Economics

Over-specialisation

Depending too heavily on a narrow range of activities or products.

Example: An oil-dependent country suffers when oil prices fall.

Read in:Chapter 36
Accounting

Overcast

When a total is added up higher than its correct amount.

Example: A list totalling $600 is incorrectly added as $650.

Read in:Chapter 7
AS & A Level Business

Overdraft

An arrangement allowing a bank account to go below zero up to an agreed limit.

Example: A shop uses an overdraft to pay a short-term bill.

Read in:Topic 5.2
Edexcel Business

Overdraft

An arrangement allowing a bank account to go below zero up to an agreed limit.

Example: A shop uses an overdraft to pay a short-term bill.

Computer Science

Overflow

When a calculation produces a value too large for the available number of bits.

Example: In eight bits, 255 + 1 cannot fit as an unsigned value.

Read in:Topic 1.1
AS & A Level Business

Overhead

An indirect running cost that cannot easily be linked to one unit.

Example: Office rent is an overhead.

Read in:Topic 5.4
Edexcel Business

Overtrading

Growing sales so fast that a business runs short of the cash needed to finance growth.

Example: A supplier takes large orders but cannot pay for enough stock.

Read in:Chapter 15
Accounting

Overvalued inventory

Inventory shown at a value higher than it should be.

Example: Recording $600 instead of $500 closing stock overstates profit by $100.

Read in:Chapter 14
Accounting

Owner’s equity

What belongs to the owner after the business's liabilities are deducted from its assets.

Example: If assets are $9,000 and liabilities $2,000, equity is $7,000.

Read in:Chapter 2
ICT

Ozone irritation

Discomfort caused by exposure to ozone produced by some older office equipment.

Example: Poorly ventilated printer rooms can cause irritation.

Read in:Chapter 5

P Dictionary terms

Edexcel Business

Packaging

The container or covering that protects and presents a product.

Example: A sturdy box protects a phone during delivery.

Business Studies

Packaging

The container or covering that protects and presents a product.

Example: A sturdy box protects a phone during delivery.

Computer Science

Packet header

Information at the start of a packet used for delivery and checking.

Example: A header may contain a destination address.

Read in:Topic 2.1
Computer Science

Packet payload

The actual data carried in a packet.

Example: Part of an image may be stored in a packet payload.

Read in:Topic 2.1
Computer Science

Packet switching

Sending data as separate packets that may follow different routes.

Example: Packets from a video call travel across the internet and are reassembled.

Read in:Topic 2.1
Accounting

Paid-up capital

The amount shareholders have actually paid on their shares.

Example: If all shareholders pay their 80 cents call, it is paid-up capital.

Read in:Chapter 17
AS & A Level Economics

Paradox of thrift

When everyone tries to save more, national income may fall and total saving may not rise.

Example: Lower household spending reduces firms' revenues and workers' incomes.

Read in:Chapter 24
Mathematics

Parallel lines

Lines in the same plane that never meet and have the same gradient when not vertical.

Example: y = 2x and y = 2x + 3 are parallel.

Read in:Chapter 31
ICT

Parallel running

Using old and new systems together for a time.

Example: A school records attendance in both systems for a month.

Read in:Chapter 7
Computer Science

Parallel transmission

Sending several bits at the same time along separate channels.

Example: An older printer interface sent multiple bits in parallel.

Read in:Topic 2.1
Computer Science

Parameter

A value or variable passed into a subroutine.

Example: A function receives radius as a parameter.

Read in:Topic 7.9
AS & A Level Economics

Pareto efficiency

A situation where nobody can be made better off without making someone else worse off.

Example: Redistributing a scarce resource may help one person only at another's expense.

Read in:Chapter 15
Computer Science

Parity bit

An extra bit added to help detect certain data errors.

Example: Even parity makes the total number of 1s even.

Read in:Topic 2.2
Computer Science

Parity check

A check that counts 1 bits to detect some transmission errors.

Example: A receiver flags data with the wrong parity.

Read in:Topic 2.2
Edexcel Business

Part-time work

Employment involving fewer hours than a typical full-time job.

Example: A student works 15 hours a week at a café.

Read in:Chapter 18
Mathematics

Part-to-part ratio

A ratio comparing one part of a group with another part.

Example: In a class with 8 girls and 6 boys, girls:boys is 4:3.

Read in:Chapter 11
Mathematics

Part-to-whole ratio

A comparison of one part with the total group.

Example: With 8 girls and 6 boys, girls:total is 8:14.

Read in:Chapter 11
Accounting

Partnership

A business owned by two or more people who share ownership and usually profits.

Example: Two accountants start a firm together.

Read in:Chapter 16
AS & A Level Business

Partnership

A business owned by two or more partners who share responsibilities and profits.

Example: Two designers start an agency together.

Read in:Topic 1.2
AS & A Level Economics

Partnership

A business owned by two or more people who share its responsibilities.

Example: Two doctors jointly own a clinic.

Read in:Chapter 2
Economics

Partnership

A business owned by two or more people who share its responsibilities.

Example: Two doctors jointly own a clinic.

Read in:Chapter 20
Edexcel Business

Partnership

A business owned by two or more people who share responsibility and profits.

Example: Two dentists run a practice together.

Business Studies

Partnership

A business owned by two or more people who share responsibility and profits.

Example: Two dentists run a practice together.

Read in:Chapter 4
Accounting

Partnership agreement

A document setting out the partners' rights, duties and how profits are shared.

Example: An agreement says profits will be divided 3:2.

Read in:Chapter 16
Accounting

Partners’ salaries

Amounts awarded to partners under the profit-sharing agreement before dividing remaining profit.

Example: One partner receives a $3,000 salary allowance.

Read in:Chapter 16
Accounting

Partner’s loan

Money a partner lends separately to the partnership as a creditor.

Example: A partner lends the business $2,000, repayable later.

Read in:Chapter 16
ICT

Password

A secret set of characters used to help control access to an account.

Example: A long unique password protects an email account.

Read in:Chapter 8
ICT

Patient record

Information stored about a patient's health and treatment.

Example: A hospital stores test results in an electronic patient record.

Read in:Chapter 6
AS & A Level Business

Payback period

The time a project takes to recover its initial cost from net cash inflows.

Example: A $10,000 investment returning $2,500 each year pays back in four years.

Read in:Topic 10.3
Accounting

Paying-in slip

A form recording cash and cheques deposited into a bank account.

Example: A shop completes a paying-in slip for its daily takings.

Read in:Chapter 4
AS & A Level Business

Penetration pricing

Starting with a low price to attract customers quickly.

Example: A new streaming service offers a low introductory fee.

Read in:Topic 3.3
Edexcel Business

Penetration pricing

Launching a product at a low price to attract customers quickly.

Example: A streaming service offers a cheap introductory price.

Read in:Chapter 37
Business Studies

Penetration pricing

Launching a product at a low price to attract customers quickly.

Example: A streaming service offers a cheap introductory price.

Read in:Chapter 13
Computer Science

Penetration testing

Authorised testing to find weaknesses in a computer system.

Example: A security tester checks whether a school's website has vulnerabilities.

Read in:Topic 5.3
Mathematics

Per cent

For every hundred; the meaning of the percent symbol.

Example: 12% means 12 out of 100.

Read in:Chapter 13
Mathematics

Percentage

A part expressed out of every 100.

Example: 25% means 25 out of 100.

Read in:Chapter 4
Mathematics

Percentage decrease

How much a value falls, expressed as a percentage of the original value.

Example: A fall from 80 to 60 is a 25% decrease.

Read in:Chapter 13
Mathematics

Percentage increase

How much a value rises, expressed as a percentage of the original value.

Example: A rise from 50 to 60 is a 20% increase.

Read in:Chapter 13
AS & A Level Economics

Perfect competition

A market with many price-taking firms selling identical products and free entry and exit.

Example: A small wheat grower cannot normally set the global wheat price.

Mathematics

Perfect square

A whole number with a whole-number square root.

Example: 81 is a perfect square.

Read in:Chapter 3
AS & A Level Economics

Perfectly elastic demand

Demand that drops to zero above one particular price.

Example: A supplier loses all customers if it charges more than the market price.

Read in:Chapter 18
Economics

Perfectly elastic demand

Demand that drops to zero above one particular price.

Example: A supplier loses all customers if it charges more than the market price.

Read in:Chapter 11
AS & A Level Economics

Perfectly elastic supply

Supply with an infinite response to a tiny price change at one price.

Example: A price-taking firm can sell its output at the prevailing market price.

Read in:Chapter 3
AS & A Level Economics

Perfectly inelastic demand

Demand that does not change at all when price changes.

Example: Buyers purchase the same number of units even after a price rise.

Read in:Chapter 3
Economics

Perfectly inelastic demand

Demand that does not change at all when price changes.

Example: Buyers purchase the same number of units even after a price rise.

Read in:Chapter 11
AS & A Level Economics

Perfectly inelastic supply

A fixed quantity supplied regardless of price changes.

Example: The supply of seats at a sold-out concert is fixed for that event.

Read in:Chapter 3
AS & A Level Business

Performance appraisal

A review of an employee's results and development needs.

Example: A supervisor discusses strengths and training at a review meeting.

Read in:Topic 7.4
AS & A Level Business

Performance-related pay

Pay linked to how well someone meets agreed performance measures.

Example: A salesperson receives a bonus for reaching a target.

Read in:Topic 2.2
Edexcel Business

Performance-related pay

Pay linked to how well someone meets agreed performance measures.

Example: A salesperson receives a bonus for reaching a target.

Read in:Chapter 22
Mathematics

Perimeter

The total distance around the outside of a flat shape.

Example: A 3 cm by 5 cm rectangle has perimeter 16 cm.

Read in:Chapter 40
AS & A Level Business

Peripheral workforce

Workers used flexibly to meet changing staffing needs.

Example: A store hires temporary staff during holiday peaks.

Read in:Topic 7.4
Mathematics

Perpendicular

Meeting at an angle of 90°.

Example: Two perpendicular lines form a right angle.

Read in:Chapter 33
Mathematics

Perpendicular bisector

A line crossing a segment at its midpoint at 90°.

Example: The perpendicular bisector of AB cuts AB into two equal halves.

Read in:Chapter 32
Mathematics

Perpendicular lines

Lines that meet at a right angle.

Example: The x-axis and y-axis are perpendicular.

Read in:Chapter 31
AS & A Level Business

Person specification

A document listing the skills and qualities a job applicant needs.

Example: A technician's specification requires equipment experience.

Read in:Topic 2.1
Edexcel Business

Person specification

A document listing the qualifications, skills and qualities a candidate should have.

Example: A vacancy asks for communication skills and two years' experience.

Read in:Chapter 18
Business Studies

Person specification

A document listing the qualifications, skills and qualities a candidate should have.

Example: A vacancy asks for communication skills and two years' experience.

Read in:Chapter 8
ICT

Personal data

Information that identifies or relates to an individual.

Example: A student's name and email address are personal data.

Read in:Chapter 8
AS & A Level Business

Personal power

Influence based on expertise, trust or personal qualities rather than formal position.

Example: Colleagues follow an experienced engineer's advice.

Read in:Topic 7.3
Edexcel Business

Personal savings

Money an owner has set aside and invests in the business.

Example: A founder uses £3,000 from savings to buy equipment.

Read in:Chapter 25
Edexcel Business

Personal selling

Promotion through direct conversations between a salesperson and customer.

Example: A car salesperson explains the features of a new vehicle.

Read in:Chapter 39
Business Studies

Persuasive advertising

Advertising that tries to make customers want to buy a product.

Example: An advert shows why a new drink seems exciting and enjoyable.

Read in:Chapter 15
AS & A Level Business

PESTEL analysis

Examining political, economic, social, technological, environmental and legal influences.

Example: A retailer studies new laws and changing consumer habits.

Read in:Topic 6.2
Accounting

Petty cash book

A record of small payments made from a small cash fund.

Example: The book records $8 spent on postage.

Read in:Chapter 5
Computer Science

Pharming

Redirecting someone to a fake website without their knowledge.

Example: A poisoned DNS record sends a user to a false login page.

Read in:Topic 5.3
ICT

Pharming

Redirecting users from a genuine website to a fake one.

Example: Someone types a bank address but is sent to an imitation site.

Read in:Chapter 8
ICT

Phased implementation

Introducing the new system part by part.

Example: A hospital introduces appointment booking before patient records.

Read in:Chapter 7
AS & A Level Economics

Phillips curve

A curve showing a possible short-run inverse relationship between inflation and unemployment.

Example: Faster demand growth may temporarily lower unemployment while raising inflation.

Computer Science

Phishing

Tricking people into giving away information through fake messages or websites.

Example: An email pretending to be a bank asks for a password.

Read in:Topic 5.3
ICT

Phishing

A fake message that tries to trick someone into revealing information or opening a harmful link.

Example: A fake bank email asks for a password.

Read in:Chapter 8
ICT

Physical safety

Protection from accidents caused by equipment and surroundings.

Example: Cables are secured to prevent people tripping.

Read in:Chapter 8
Edexcel Business

Physiological needs

Basic human requirements such as food, water and rest.

Example: Employees need enough income to meet everyday living needs.

Read in:Chapter 21
Economics

Picketing

Standing near a workplace to encourage others to support industrial action.

Example: Union members gather outside the factory entrance.

Read in:Chapter 19
Mathematics

Pictogram

A chart using pictures or symbols to represent amounts.

Example: One book symbol might represent 5 books.

Read in:Chapter 46
Mathematics

Pie chart

A circle divided into sectors showing proportions of a total.

Example: A 90° sector represents one quarter of a pie chart.

Read in:Chapter 46
Edexcel Business

Piece rate

Pay based on the number of items an employee produces.

Example: A worker earns 30p for each assembled item.

Read in:Chapter 22
AS & A Level Economics

Pigouvian tax

A tax designed to make decision-makers pay for external costs they create.

Example: A carbon tax raises the cost of polluting production.

Read in:Chapter 21
ICT

Pilot implementation

Trying a new system with a small group before wider use.

Example: One school office tests a new booking system first.

Read in:Chapter 7
ICT

Pilotless aircraft

An aircraft that can operate without a pilot on board.

Example: An unmanned aircraft follows programmed flight instructions.

Read in:Chapter 5
Computer Science

Pixel

The smallest coloured picture element in a digital image.

Example: A photo on a screen is made of many pixels.

Edexcel Business

Place

The part of the marketing mix concerned with how customers obtain products.

Example: A clothing brand sells through shops and its website.

Read in:Chapter 38
Mathematics

Place value

The value of a digit according to its position in a number.

Example: The 3 in 3,200 represents 3,000.

Read in:Chapter 5
ICT

Plagiarism

Presenting someone else's words or ideas as your own without proper acknowledgement.

Example: Copying an online article into homework without credit is plagiarism.

Read in:Chapter 10
Computer Science

Plaintext

Information in its original readable form.

Example: The words Hello there are plaintext before encryption.

Read in:Topic 2.3
Mathematics

Plane

A flat two-dimensional surface extending in all directions.

Example: A sheet of paper models part of a plane.

Read in:Chapter 32
Mathematics

Plane of symmetry

A flat surface dividing a 3D solid into mirror-image halves.

Example: A sphere has infinitely many planes of symmetry.

Read in:Chapter 36
AS & A Level Economics

Planned economy

An economy where the government makes most production decisions.

Example: The government sets production targets for factories.

Read in:Chapter 1
Economics

Planned economy

An economy where the government makes most production decisions.

Example: The government sets production targets for factories.

Read in:Chapter 13
AS & A Level Business

Planning

Deciding in advance what a business wants to achieve and how.

Example: A manager prepares next month's production schedule.

Read in:Topic 2.3
ICT

Plotter

An output device for precise large drawings or plans.

Example: An architect prints a building plan using a plotter.

Read in:Chapter 2
Mathematics

Point

A precise position with no length or width.

Example: Mark a point A on the page.

Read in:Chapter 32
ICT

Point of sale

The place or system used to record and complete a sale.

Example: A checkout records a purchase and updates stock.

Read in:Chapter 6
AS & A Level Economics

Policy conflict

When a policy helps one government aim but makes another harder to achieve.

Example: Boosting demand may raise employment but also raise inflation.

Read in:Chapter 28
Economics

Policy conflict

When a policy helps one government aim but makes another harder to achieve.

Example: Boosting demand may raise employment but also raise inflation.

Read in:Chapter 25
Accounting

Policy consistency

Applying chosen accounting methods the same way from year to year where appropriate.

Example: A firm uses the same method of valuing inventory each year.

Read in:Chapter 27
AS & A Level Economics

Policy credibility

The extent to which people believe an authority will follow its announced policies.

Example: A credible inflation target helps anchor wage negotiations.

AS & A Level Economics

Policy interest rate

The key interest rate set by a central bank to influence borrowing and saving.

Example: A lower policy rate can make loans cheaper.

Read in:Chapter 11
Economics

Policy interest rate

The key interest rate set by a central bank to influence borrowing and saving.

Example: A lower policy rate can make loans cheaper.

Read in:Chapter 27
AS & A Level Economics

Policy lag

The delay between identifying an economic problem and a policy affecting the economy.

Example: An interest-rate increase may take months to reduce spending.

Read in:Chapter 11
AS & A Level Economics

Policy trade-off

When improving one economic objective may worsen another.

Example: Stimulating growth can increase inflation pressure.

Read in:Chapter 28
AS & A Level Economics

Policy transmission mechanism

The steps through which policy changes influence spending, output and inflation.

Example: Higher interest rates raise borrowing costs, reducing consumption and investment.

Read in:Chapter 11
Mathematics

Polygon

A closed flat shape made from straight line segments.

Example: A pentagon is a five-sided polygon.

Read in:Chapter 32
AS & A Level Economics

Population

The number of people living in a place.

Example: A city has a population of 500,000.

Economics

Population

The number of people living in a place.

Example: A city has a population of 500,000.

Mathematics

Population

The whole group a statistical study aims to describe.

Example: Every student in a school is the population of a school survey.

Read in:Chapter 45
AS & A Level Economics

Population growth

An increase in the number of people living in an area over time.

Example: More births than deaths can increase a country’s population.

Read in:Chapter 30
Economics

Population growth

An increase in the number of people living in an area over time.

Example: More births than deaths can increase a country’s population.

Read in:Chapter 35
AS & A Level Business

Porter's Five Forces

A framework for analysing competition, including rivals, buyers, suppliers, substitutes and new entrants.

Example: A café assesses whether nearby competitors are likely to cut prices.

Read in:Topic 6.2
Mathematics

Position vector

A vector showing where a point is measured from the origin.

Example: The position vector of (2,5) is (2,5).

Read in:Chapter 43
AS & A Level Business

Positional power

Influence gained from someone's official job title or role.

Example: A manager can approve an employee's leave.

Read in:Topic 7.3
Economics

Positive externality

A benefit received by others who were not directly involved.

Example: Vaccination can protect people beyond the vaccinated person.

Read in:Chapter 14
Mathematics

Positive index

A raised number greater than zero.

Example: 10² = 100 has a positive index.

Read in:Chapter 8
AS & A Level Economics

Positive output gap

When actual real GDP exceeds sustainable potential GDP temporarily.

Example: Demand exceeds normal capacity and inflation pressure increases.

Read in:Chapter 25
AS & A Level Economics

Positive statement

A claim about what is or could be, which can be checked using evidence.

Example: “Higher interest rates reduce borrowing” is a positive statement.

Read in:Chapter 1
AS & A Level Economics

Potential economic growth

An increase in what an economy could sustainably produce at full capacity.

Example: New technology expands potential output even if demand is weak.

AS & A Level Economics

Poverty

Not having enough resources to meet basic needs or to live at an acceptable standard.

Example: A family cannot afford adequate food and housing.

Economics

Poverty

Not having enough resources to meet basic needs or to live at an acceptable standard.

Example: A family cannot afford adequate food and housing.

Economics

Poverty cycle

A situation in which poverty makes it harder to escape poverty in the future.

Example: Low income limits education, leading to low-paid work.

Read in:Chapter 33
AS & A Level Economics

Poverty line

An income threshold used to measure whether people are living in poverty.

Example: Households below a set amount are counted as poor.

Read in:Chapter 22
Economics

Poverty line

An income threshold used to measure whether people are living in poverty.

Example: Households below a set amount are counted as poor.

Read in:Chapter 33
AS & A Level Economics

Poverty trap

A situation where earning more brings little extra income because benefits fall or taxes rise.

Example: Someone loses most of their benefits after taking extra work.

Read in:Chapter 22
Mathematics

Power

A short way to write repeated multiplication of the same number.

Example: 2 to the power 4 means 2 × 2 × 2 × 2.

Read in:Chapter 3
Mathematics

Power of a power

Raising an existing power to another power.

Example: (2³)² = 2⁶.

Read in:Chapter 7
Mathematics

Power of a product

Raising each factor in a product to the same power.

Example: (2x)³ = 8x³.

Read in:Chapter 22
Mathematics

Power of ten

A number made by multiplying 10 by itself repeatedly, or using a negative index for smaller values.

Example: 10³ = 1,000.

Read in:Chapter 8
AS & A Level Business

Power-interest matrix

A grid that groups stakeholders by their influence and interest.

Example: A regulator is placed in the high-power group.

Read in:Topic 1.5
Economics

PPC shift

A movement of the entire production possibility curve due to changed productive capacity.

Example: New machines may shift the PPC outwards.

Read in:Chapter 4
AS & A Level Economics

Predatory pricing

Setting very low prices to drive rivals out, with the aim of later raising prices.

Example: A dominant supplier sells below cost to weaken smaller competitors.

Read in:Chapter 20
Edexcel Business

Predatory pricing

Setting very low prices to drive rivals out, with the aim of later raising prices.

Example: A dominant supplier sells below cost to weaken smaller competitors.

Read in:Chapter 37
Accounting

Preference share

A share that usually gives priority to a stated dividend before ordinary shareholders.

Example: A 5% preference share normally receives its fixed-rate dividend first.

Read in:Chapter 17
Accounting

Prepaid expense

A payment made now for a benefit relating to a future accounting period.

Example: Insurance paid in December for next January is prepaid.

Read in:Chapter 12
Computer Science

Presence check

Checking that a required value has been entered.

Example: An application cannot be submitted with a blank name.

Read in:Topic 7.5
ICT

Presence check

A rule checking that a required field is not left blank.

Example: A form requires an email address.

Read in:Chapter 7
AS & A Level Business

Present value

The value today of money expected to be received or paid in the future.

Example: $110 received in one year is worth $100 today at a 10% rate.

Read in:Topic 10.3
ICT

Presentation

Information prepared to be shown or explained to others.

Example: A student creates slides for a class talk.

Read in:Chapter 9
Edexcel Business

Price

The amount customers must pay to obtain a product or service.

Example: A café sets a £3 price for a sandwich.

AS & A Level Economics

Price ceiling

A legal maximum price set for a product or service.

Example: A rent ceiling may keep some housing affordable but cause a shortage.

Read in:Chapter 5
Economics

Price determination

The process by which demand and supply set the market price.

Example: Demand and supply intersect at the equilibrium price.

AS & A Level Economics

Price discrimination

Charging different prices to customers for the same product when differences do not reflect costs.

Example: A railway sells cheaper off-peak tickets to attract price-sensitive travellers.

AS & A Level Business

Price elastic demand

Demand that changes by a greater percentage than the price change.

Example: A 5% price increase causes a 12% fall in quantity demanded.

Read in:Topic 8.1
Economics

Price elastic demand

Demand that changes by a larger percentage than the price change.

Example: A small increase in holiday prices causes a large fall in bookings.

Read in:Chapter 11
Economics

Price elastic supply

Supply that changes by a larger percentage than the price change.

Example: A factory with spare capacity can quickly increase output.

Read in:Chapter 12
AS & A Level Business

Price elasticity of demand

How strongly quantity demanded responds to a percentage change in price.

Example: A 10% price rise causes a 20% drop in sales, so demand is price elastic.

Read in:Topic 8.1
AS & A Level Economics

Price elasticity of demand

How strongly quantity demanded responds to a change in price.

Example: If a 10% price rise leads to a 20% sales fall, demand is elastic.

Economics

Price elasticity of demand

How strongly quantity demanded responds to a change in price.

Example: If a 10% price rise leads to a 20% sales fall, demand is elastic.

Read in:Chapter 11
Edexcel Business

Price elasticity of demand

A measure of how strongly the quantity demanded changes when price changes.

Example: A small price rise causes a big drop in cinema ticket sales.

Read in:Chapter 37
Business Studies

Price elasticity of demand

A measure of how strongly the quantity demanded changes when price changes.

Example: A small price rise causes a big drop in cinema ticket sales.

Read in:Chapter 13
AS & A Level Economics

Price elasticity of supply

How strongly quantity supplied responds to a change in price.

Example: A 10% price increase leads to 20% more units supplied.

Read in:Chapter 3
Economics

Price elasticity of supply

How strongly quantity supplied responds to a change in price.

Example: A 10% price increase leads to 20% more units supplied.

Read in:Chapter 12
AS & A Level Economics

Price floor

A legal minimum price that sellers must charge.

Example: A minimum price for alcohol aims to reduce harmful consumption.

Read in:Chapter 5
AS & A Level Economics

Price index

A measure of average prices relative to a chosen base period.

Example: An index rising from 100 to 108 indicates an 8% increase.

AS & A Level Business

Price inelastic demand

Demand that changes by a smaller percentage than the price change.

Example: A 10% price rise causes only a 3% fall in quantity demanded.

Read in:Topic 8.1
Economics

Price inelastic demand

Demand that changes by a smaller percentage than the price change.

Example: A big increase in salt prices may barely affect purchases.

Read in:Chapter 11
Economics

Price inelastic supply

Supply that changes by a smaller percentage than the price change.

Example: Farmers cannot grow extra wheat immediately.

Read in:Chapter 12
AS & A Level Economics

Price maker

A firm with enough market power to influence the price it charges.

Example: A monopolist may be able to raise prices.

Read in:Chapter 18
Economics

Price maker

A firm with enough market power to influence the price it charges.

Example: A monopolist may be able to raise prices.

Read in:Chapter 23
AS & A Level Economics

Price mechanism

How changes in prices guide buyers and sellers and help allocate resources.

Example: Higher coffee prices encourage more coffee production.

Economics

Price mechanism

How changes in prices guide buyers and sellers and help allocate resources.

Example: Higher coffee prices encourage more coffee production.

Economics

Price signal

Information that a change in price gives to buyers and sellers.

Example: A rising price signals that a product is scarce relative to demand.

Read in:Chapter 6
AS & A Level Business

Price skimming

Launching at a high price and lowering it later.

Example: A new game console starts with a premium price.

Read in:Topic 3.3
Edexcel Business

Price skimming

Launching a new product at a high price and lowering it later.

Example: A technology firm charges more when a device first launches.

Read in:Chapter 37
Business Studies

Price skimming

Launching a new product at a high price and lowering it later.

Example: A technology firm charges more when a device first launches.

Read in:Chapter 13
AS & A Level Economics

Price stability

Keeping the overall price level from changing too quickly.

Example: A central bank aims for low and predictable inflation.

Economics

Price stability

Keeping the overall price level from changing too quickly.

Example: A central bank aims for low and predictable inflation.

Read in:Chapter 25
AS & A Level Economics

Price taker

A firm that has little or no control over market price.

Example: A small farmer may have to accept the market price.

Read in:Chapter 18
Economics

Price taker

A firm that has little or no control over market price.

Example: A small farmer may have to accept the market price.

Read in:Chapter 23
Business Studies

Price-elastic demand

Demand where quantity bought changes by a larger percentage than price.

Example: A 5% rise in price causes a 15% fall in sales.

Read in:Chapter 13
Business Studies

Price-inelastic demand

Demand where quantity bought changes by a smaller percentage than price.

Example: A 10% rise in price causes only a 2% fall in sales.

Read in:Chapter 13
Edexcel Business

Pricing strategy

The method a business uses to choose prices for its products.

Example: A new company starts with low prices to attract customers.

Read in:Chapter 37
AS & A Level Economics

Primary income

Income earned across borders from work and investments.

Example: A resident receives dividends from shares in a foreign company.

Read in:Chapter 13
Economics

Primary income

Income earned across borders from work and investments.

Example: A resident receives dividends from shares in a foreign company.

Read in:Chapter 39
Computer Science

Primary key

A field or combination of fields that uniquely identifies each record.

Example: StudentID can be the primary key.

Read in:Topic 9.1
AS & A Level Business

Primary research

New information collected first-hand for a particular purpose.

Example: A shop interviews its own customers.

Read in:Topic 3.2
Edexcel Business

Primary research

New information collected directly for a specific research purpose.

Example: A café interviews customers about its menu.

Read in:Chapter 33
Business Studies

Primary research

New information collected directly for a specific research purpose.

Example: A café interviews customers about its menu.

Read in:Chapter 11
AS & A Level Business

Primary sector

Businesses that extract or harvest natural resources.

Example: Mining and farming are primary-sector activities.

Read in:Topic 1.2
AS & A Level Economics

Primary sector

Businesses extracting or collecting natural resources.

Example: Farming and fishing are primary-sector activities.

Read in:Chapter 30
Economics

Primary sector

Businesses extracting or collecting natural resources.

Example: Farming and fishing are primary-sector activities.

Edexcel Business

Primary sector

Businesses that collect or extract raw materials from nature.

Example: Farming and fishing are in the primary sector.

Read in:Chapter 7
Business Studies

Primary sector

Businesses that collect or extract raw materials from nature.

Example: Farming and fishing are in the primary sector.

Read in:Chapter 2
Computer Science

Primary storage

Memory that the processor can access directly for current work.

Example: RAM holds data while an application is running.

Read in:Topic 3.3
Accounting

Prime cost

The total of direct materials, direct labour and direct expenses.

Example: Materials $100 + labour $60 + direct expenses $10 = $170 prime cost.

Read in:Chapter 19
Mathematics

Prime number

A whole number greater than 1 with exactly two factors: 1 and itself.

Example: 7 is prime because only 1 and 7 divide it exactly.

Read in:Chapter 1
Mathematics

Prism

A solid with the same cross-section along its length.

Example: A triangular prism has two matching triangular ends.

Read in:Chapter 40
AS & A Level Economics

Prisoner's dilemma

A situation where individually sensible choices can leave all participants worse off.

Example: Two firms both cut prices even though both would earn more without a price war.

Read in:Chapter 19
AS & A Level Economics

Private cost

A cost paid by the person or business taking an action.

Example: A driver's fuel purchase is a private cost.

Read in:Chapter 16
Economics

Private cost

A cost paid by the person or business taking an action.

Example: A driver's fuel purchase is a private cost.

Read in:Chapter 14
Edexcel Business

Private enterprise

A business owned and operated by private individuals or organisations.

Example: A family-owned shop is a private enterprise.

Read in:Chapter 1
AS & A Level Economics

Private good

A good that is both rival in consumption and excludable.

Example: A sandwich is a private good because only its buyer can eat it.

Read in:Chapter 1
Computer Science

Private key

A secret key kept by its owner in public-key cryptography.

Example: A user keeps the private key away from other people.

Read in:Topic 2.3
Edexcel Business

Private limited company

A company whose shares are not offered for sale to the general public.

Example: A family-owned company may be a private limited company.

Business Studies

Private limited company

A company whose shares are not offered for sale to the general public.

Example: A family-owned company may be a private limited company.

Read in:Chapter 4
AS & A Level Business

Private sector

Businesses owned and controlled by private individuals or organisations.

Example: An independent grocery shop operates in the private sector.

Read in:Topic 1.2
AS & A Level Economics

Private sector

Businesses and organisations owned and run by private individuals or companies.

Example: A privately owned supermarket is in the private sector.

Read in:Chapter 27
Economics

Private sector

Businesses and organisations owned and run by private individuals or companies.

Example: A privately owned supermarket is in the private sector.

Edexcel Business

Private sector

Businesses owned and controlled by individuals or companies rather than government.

Example: A privately owned supermarket is in the private sector.

Read in:Chapter 5
Business Studies

Private sector

Businesses owned and controlled by individuals or companies rather than government.

Example: A privately owned supermarket is in the private sector.

AS & A Level Business

Privatisation

Transferring ownership of a state-run business to private owners.

Example: A government sells its telephone company to private investors.

Read in:Topic 6.1
AS & A Level Economics

Privatisation

Moving a state-owned business or service into private ownership.

Example: A government sells its telephone company to private investors.

Read in:Chapter 21
Economics

Privatisation

Moving a state-owned business or service into private ownership.

Example: A government sells its telephone company to private investors.

Edexcel Business

Privatisation

Selling a government-owned business to private owners.

Example: A state-owned airline is sold to investors.

Read in:Chapter 5
Business Studies

Privatisation

Selling a government-owned business to private owners.

Example: A state-owned airline is sold to investors.

Read in:Chapter 2
Mathematics

Probability

A measure of how likely an event is, from 0 (impossible) to 1 (certain).

Example: A fair coin has probability 1/2 of landing heads.

Read in:Chapter 44
Computer Science

Procedure

A named subroutine that performs a task without returning a value.

Example: A procedure displays a welcome message.

Read in:Topic 7.9
AS & A Level Business

Process innovation

Introducing an improved way to make or deliver a product.

Example: A business automates its order-packing process.

Read in:Topic 9.3
Edexcel Business

Process production

Making products continuously through a series of linked production stages.

Example: An oil refinery operates a continuous production process.

Read in:Chapter 41
Edexcel Business

Producer goods

Items businesses use to make other products.

Example: A bakery buys an industrial oven.

Read in:Chapter 1
AS & A Level Economics

Producer surplus

The difference between the price sellers receive and the lowest price they would accept.

Example: A farmer willing to sell at $4 receives $6 and gains $2 surplus.

Edexcel Business

Product

A good or service offered to meet a customer's needs.

Example: A smartphone and a haircut are both products.

Mathematics

Product

The answer to a multiplication.

Example: The product of 6 and 5 is 30.

Read in:Chapter 6
AS & A Level Business

Product development

Creating new products for markets the business already serves.

Example: A drinks brand launches a sugar-free version.

Read in:Topic 6.2
Edexcel Business

Product development

Creating new products for markets the business already serves.

Example: A drinks brand launches a sugar-free version.

AS & A Level Business

Product differentiation

Making a product meaningfully different from competitors' offerings.

Example: A phone maker offers a distinctive camera feature.

Read in:Topic 3.3
AS & A Level Business

Product innovation

Developing a new or improved good or service.

Example: A technology company launches a redesigned battery.

Read in:Topic 9.3
ICT

Product key

A code used to activate or verify a software licence.

Example: A program asks for a key during setup.

Read in:Chapter 9
AS & A Level Business

Product life cycle

The stages a product may pass through: introduction, growth, maturity and decline.

Example: A new app starts with low sales, then grows in popularity.

Read in:Topic 3.3
Edexcel Business

Product life cycle

The stages a product may pass through from introduction to decline.

Example: A new game launches, grows in popularity and later loses sales.

Read in:Chapter 36
Business Studies

Product life cycle

The stages a product goes through from launch to falling sales.

Example: A new phone model grows in sales, matures and eventually declines.

AS & A Level Business

Product orientation

Focusing primarily on the product and its technical features.

Example: An engineer-led firm develops an invention before testing demand.

Read in:Topic 3.1
Edexcel Business

Product orientation

Developing products mainly from the business's ideas or technical strengths.

Example: A firm creates new software before checking customer demand.

Read in:Chapter 34
Business Studies

Product orientation

Developing products mainly from the business's ideas or technical strengths.

Example: A firm creates new software before checking customer demand.

Read in:Chapter 11
AS & A Level Business

Product testing

Checking a product's performance and suitability before launch.

Example: A food business asks tasters to evaluate a new snack.

Read in:Topic 8.1
Business Studies

Production

Making goods or providing services using resources.

Example: A furniture company turns wood into tables.

Economics

Production capacity

The maximum amount a business can make with its facilities.

Example: A factory can produce up to 1,000 bicycles a week.

Read in:Chapter 12
Edexcel Business

Production chain

The linked stages that transform resources into finished goods or services.

Example: Cotton grows on a farm, becomes fabric and then clothing.

Read in:Chapter 7
AS & A Level Economics

Production costs

The expenses involved in making a product.

Example: Higher energy bills can reduce supply.

Economics

Production costs

The expenses involved in making a product.

Example: Higher energy bills can reduce supply.

Read in:Chapter 8
AS & A Level Economics

Production possibility curve

A curve showing the maximum combinations of two goods an economy can produce with its resources.

Example: A country can make more cars only by producing fewer tractors.

Economics

Production possibility curve

A curve showing the maximum combinations of two goods an economy can produce with its resources.

Example: A country can make more cars only by producing fewer tractors.

Read in:Chapter 4
AS & A Level Economics

Production possibility frontier

A curve showing the maximum combinations of two outputs possible using existing resources and technology.

Example: A country can produce more food only by giving up some machinery output.

Read in:Chapter 1
AS & A Level Economics

Production quota

A rule restricting the quantity of a good that may be produced.

Example: A fishery limits the annual catch to protect fish stocks.

Read in:Chapter 21
AS & A Level Economics

Productive capacity

The maximum output that resources and technology can produce.

Example: New machinery raises the factory’s productive capacity.

Economics

Productive capacity

The maximum output that resources and technology can produce.

Example: New machinery raises the factory’s productive capacity.

Read in:Chapter 36
AS & A Level Economics

Productive efficiency

Producing as much as possible with the resources available.

Example: A point on the PPC shows resources fully used.

Economics

Productive efficiency

Producing as much as possible with the resources available.

Example: A point on the PPC shows resources fully used.

Read in:Chapter 4
Economics

Productive potential

The goods and services an economy could produce using its resources effectively.

Example: New technology can increase an economy's productive potential.

AS & A Level Economics

Productivity

The amount of output produced for each unit of input.

Example: A machine makes 40 units an hour instead of 25.

Economics

Productivity

The amount of output produced for each unit of input.

Example: A machine makes 40 units an hour instead of 25.

Edexcel Business

Productivity

The amount of output produced for each worker or unit of input over a period.

Example: If a worker makes 12 items instead of 10 per hour, productivity rises.

Business Studies

Productivity

The amount of output produced for each worker or unit of input over a period.

Example: If a worker makes 12 items instead of 10 per hour, productivity rises.

Accounting

Profit

The amount by which income is greater than expenses for a period.

Example: Income of $2,000 minus expenses of $1,600 gives $400 profit.

AS & A Level Economics

Profit

Money left after a business subtracts its costs from its revenue.

Example: A stall earns $200 and spends $150, making $50 profit.

Economics

Profit

Money left after a business subtracts its costs from its revenue.

Example: A stall earns $200 and spends $150, making $50 profit.

Read in:Chapter 2
Edexcel Business

Profit

The money left after a business subtracts its costs from its revenue.

Example: A shop earns $1,000 and spends $800, leaving $200 profit.

Mathematics

Profit

Money left after subtracting costs from revenue.

Example: A $50 sale with $35 costs gives $15 profit.

Read in:Chapter 16
Business Studies

Profit

The money left after a business subtracts its costs from its revenue.

Example: A shop earns $1,000 and spends $800, leaving $200 profit.

Accounting

Profit adjustment

A change to reported profit after correcting an error or making an adjustment.

Example: Removing an overstated expense increases profit.

Read in:Chapter 7
Edexcel Business

Profit before tax

The profit a business earns before deducting corporation tax.

Example: A company reports £40,000 profit before tax.

Read in:Chapter 29
AS & A Level Business

Profit centre

A division whose revenues and costs are tracked to measure profit.

Example: A branch manager is responsible for branch profit.

Read in:Topic 5.5
Accounting

Profit for the year

The remaining profit after expenses are deducted from gross profit and any other income is added.

Example: Gross profit $900 − expenses $500 = $400 profit for the year.

Read in:Chapter 15
AS & A Level Business

Profit for the year

The profit remaining after all expenses and tax for the accounting period.

Example: A company ends the year with $12,000 profit after tax.

Read in:Topic 10.1
Accounting

Profit margin

Profit for the year divided by revenue, multiplied by 100.

Example: $800 profit on $8,000 sales gives a 10% profit margin.

Edexcel Business

Profit margin

Profit for the year divided by revenue, multiplied by 100.

Example: $800 profit on $8,000 sales gives a 10% profit margin.

AS & A Level Business

Profit maximisation

Trying to achieve the highest possible profit.

Example: A firm compares pricing options to increase profit.

Read in:Topic 1.4
AS & A Level Economics

Profit maximisation

A business objective of earning the greatest possible profit.

Example: A company chooses the production level that gives its highest profit.

Economics

Profit maximisation

A business objective of earning the greatest possible profit.

Example: A company chooses the production level that gives its highest profit.

Read in:Chapter 22
Edexcel Business

Profit maximisation

Trying to achieve the highest possible profit.

Example: A firm compares pricing options to increase profit.

Read in:Chapter 2
Accounting

Profit on disposal

The amount by which sale proceeds exceed an asset's net book value.

Example: An asset with a $700 book value sells for $850, making $150 profit.

Read in:Chapter 11
Edexcel Business

Profit satisfying

Earning a satisfactory level of profit rather than the highest possible profit.

Example: An owner accepts lower profit to spend more time with family.

Read in:Chapter 2
Edexcel Business

Profit sharing

A system where employees receive a share of company profits.

Example: Staff get an extra payment after a profitable year.

Read in:Chapter 22
Business Studies

Profit sharing

A system where employees receive a share of company profits.

Example: Staff get an extra payment after a profitable year.

Read in:Chapter 6
Accounting

Profit-sharing ratio

The proportion in which partners divide remaining profits or losses.

Example: A 3:2 ratio splits $500 into $300 and $200.

Read in:Chapter 16
Accounting

Profitability

How well a business earns profit compared with its sales or resources.

Example: A higher profit margin can indicate improved profitability.

Edexcel Business

Profitability

How much profit a business makes compared with its sales or investment.

Example: Two shops earn the same profit, but one uses less capital.

Business Studies

Profitability

How much profit a business makes compared with its sales or investment.

Example: Two shops earn the same profit, but one uses less capital.

Read in:Chapter 26
Computer Science

Program counter

A register holding the address of the next instruction to fetch.

Example: After an instruction is fetched, the program counter is updated.

Read in:Topic 3.1
Computer Science

Program development life cycle

The main stages of planning, creating, testing and maintaining a program.

Example: A student analyses a problem before coding and testing a solution.

Read in:Topic 7.1
Economics

Progressive tax

A tax where higher-income earners pay a larger percentage of their income.

Example: The tax rate rises as a person's earnings rise.

Read in:Chapter 26
Edexcel Business

Promotion

Activities used to inform customers about a product and persuade them to buy.

Example: A brand uses adverts and discounts to promote a new drink.

Business Studies

Promotion

Activities used to inform customers about a product and persuade them to buy.

Example: A brand uses adverts and discounts to promote a new drink.

AS & A Level Business

Promotional elasticity of demand

How strongly quantity demanded responds to a percentage change in promotional spending.

Example: Advertising spending rises 10% and sales rise 6%.

Read in:Topic 8.1
AS & A Level Business

Promotional pricing

Temporarily lowering price to encourage purchases.

Example: A store offers a weekend discount.

Read in:Topic 3.3
Edexcel Business

Promotional pricing

Temporarily lowering prices to encourage purchases.

Example: A store offers 20% off during a weekend sale.

Read in:Chapter 37
Business Studies

Promotional pricing

Temporarily lowering prices to encourage purchases.

Example: A store offers 20% off during a weekend sale.

Read in:Chapter 13
Mathematics

Proper fraction

A positive fraction with a numerator smaller than its denominator.

Example: 3/5 is a proper fraction.

Read in:Chapter 4
AS & A Level Economics

Property rights

Legal rights to own, use and control resources.

Example: Clear ownership of a lake can help people negotiate pollution controls.

Mathematics

Proportion

A relationship between quantities or a share of a whole.

Example: If 2 out of 5 students cycle, the proportion is 2/5.

Read in:Chapter 11
Mathematics

Proportional

Quantities linked by a constant multiplier or an inverse rule.

Example: If y = 4x, y is proportional to x.

Read in:Chapter 26
Economics

Proportional tax

A tax that charges the same percentage at all income levels.

Example: Everyone pays 10% of their income in tax.

Read in:Chapter 26
AS & A Level Economics

Protectionism

Government actions that limit imports to support domestic producers.

Example: A high tariff makes foreign products more expensive.

Read in:Chapter 12
Economics

Protectionism

Government actions that limit imports to support domestic producers.

Example: A high tariff makes foreign products more expensive.

Read in:Chapter 37
Business Studies

Protectionism

Government actions designed to protect domestic industries from foreign competition.

Example: A country adds tariffs to imported clothing.

Mathematics

Protractor

A tool for measuring or drawing angles in degrees.

Example: Use a protractor to draw a 65° angle.

Read in:Chapter 33
Accounting

Provision for doubtful debts

An estimate of the part of customers' debts that may never be collected.

Example: A business expects 3% of $10,000 debts may be lost, so provides $300.

Read in:Chapter 13
Edexcel Business

Proximity to market

How close a business is to the customers it wants to serve.

Example: A café opens near a busy train station.

Read in:Chapter 8
Edexcel Business

Proximity to raw materials

How close a factory is to the materials it needs.

Example: A sawmill may locate near timber forests.

Read in:Chapter 8
Accounting

Prudence principle

Using care when making estimates so assets and profit are not overstated and liabilities are not understated.

Example: A business allows for debts customers may not pay.

Read in:Chapter 26
Computer Science

Pseudocode

Instructions written in a structured, code-like form without the exact rules of a programming language.

Example: IF score >= 50 THEN OUTPUT "Pass".

Edexcel Business

Psychographic segmentation

Grouping customers by lifestyle, interests, beliefs or attitudes.

Example: A sports shop targets people who enjoy outdoor adventure.

Read in:Chapter 35
Edexcel Business

Psychological pricing

Using prices that influence how customers perceive a product.

Example: A shop prices a bag at $19.99 instead of $20.

Read in:Chapter 37
Business Studies

Psychological pricing

Using prices that influence how customers perceive a product.

Example: A shop prices a bag at $19.99 instead of $20.

Read in:Chapter 13
Edexcel Business

Public corporation

A business owned by the state and usually run to provide an essential service.

Example: A state-owned railway operator may be a public corporation.

Read in:Chapter 5
Business Studies

Public corporation

A business organisation owned by government and set up to provide goods or services.

Example: A government may create a corporation to operate public transport.

Read in:Chapter 4
Edexcel Business

Public enterprise

An organisation owned or controlled by the government to provide goods or services.

Example: A government-run water provider is a public enterprise.

Read in:Chapter 1
AS & A Level Economics

Public expenditure

Money the government spends on services and projects.

Example: Building a new hospital is public expenditure.

Read in:Chapter 25
Economics

Public expenditure

Money the government spends on services and projects.

Example: Building a new hospital is public expenditure.

Read in:Chapter 24
Edexcel Business

Public flotation

When a company first offers its shares to the public on a stock market.

Example: A private company becomes publicly listed to raise finance.

Read in:Chapter 4
AS & A Level Economics

Public good

A good that people cannot easily be excluded from using and whose use by one person does not reduce availability to others.

Example: Street lighting is a common example.

Read in:Chapter 5
Economics

Public good

A good that people cannot easily be excluded from using and whose use by one person does not reduce availability to others.

Example: Street lighting is a common example.

Read in:Chapter 14
Computer Science

Public key

A key that can be shared openly and used in public-key cryptography.

Example: A website shares a public key through its certificate.

Read in:Topic 2.3
Edexcel Business

Public limited company

A company that can offer its shares to the general public, subject to legal rules.

Example: A large company may list shares on a stock exchange.

Business Studies

Public limited company

A company that can offer its shares to the general public, subject to legal rules.

Example: A large company may list shares on a stock exchange.

Read in:Chapter 4
Edexcel Business

Public ownership

When a government owns and controls an organisation or asset.

Example: The government runs a national water supplier.

Read in:Chapter 5
Edexcel Business

Public relations

Activities that build a good public image for a business.

Example: A company sponsors a community clean-up.

Read in:Chapter 39
Business Studies

Public relations

Activities that build a good public image for a business.

Example: A company sponsors a community clean-up.

Read in:Chapter 15
AS & A Level Business

Public sector

Organisations owned or controlled by government.

Example: A government-operated hospital belongs to the public sector.

Read in:Topic 1.2
Economics

Public sector

Organisations owned or controlled by the government.

Example: A state-funded school belongs to the public sector.

Edexcel Business

Public sector

Organisations owned or controlled by government.

Example: A government-run school is part of the public sector.

Read in:Chapter 5
Business Studies

Public sector

Organisations owned or controlled by government.

Example: A government-run school is part of the public sector.

AS & A Level Economics

Public services

Services provided or funded by government for the public.

Example: Public education and street maintenance are public services.

Read in:Chapter 30
Economics

Public services

Services provided or funded by government for the public.

Example: Public education and street maintenance are public services.

Read in:Chapter 24
Edexcel Business

Public services

Services provided or funded by government for the public.

Example: Public education and street maintenance are public services.

Read in:Chapter 5
Accounting

Purchases

Goods bought by a trading business for resale.

Example: A retailer buys 20 shirts to sell in the shop.

Read in:Chapter 3
Accounting

Purchases journal

A book that records credit purchases of goods for resale.

Example: A $150 credit purchase goes in the purchases journal.

Read in:Chapter 5
Accounting

Purchases ledger control account

A summary account showing the total owed to credit suppliers.

Example: The business owes suppliers $4,500.

Read in:Chapter 9
Accounting

Purchases returns

Goods bought for resale that are sent back to suppliers.

Example: A shop returns damaged shirts to the wholesaler.

Read in:Chapter 3
Edexcel Business

Purchasing economies

Lower input prices gained when a large business buys in bulk.

Example: A supermarket negotiates a lower price per carton.

Read in:Chapter 40
AS & A Level Economics

Purchasing power

How much goods and services an amount of money can buy.

Example: If prices rise, $10 buys less than before.

Economics

Purchasing power

How much goods and services an amount of money can buy.

Example: If prices rise, $10 buys less than before.

Read in:Chapter 31
AS & A Level Economics

Purchasing power parity

A method comparing incomes or output using prices of similar goods across countries.

Example: PPP-adjusted incomes reflect local living costs rather than only market exchange rates.

Mathematics

Pythagoras' theorem

In a right-angled triangle, the square of the longest side equals the sum of the squares of the other sides.

Example: A triangle with short sides 3 and 4 has hypotenuse 5.

Read in:Chapter 41

Q Dictionary terms

Computer Science

QR code

A two-dimensional code that can hold information such as a URL.

Example: A phone scans a QR code to open a menu.

Read in:Topic 3.2
ICT

QR code

A square pattern that stores data for a camera or scanner to read.

Example: Scanning a QR code opens a website.

Read in:Chapter 2
Mathematics

Quadratic curve

The graph of a function containing a squared variable as its highest power.

Example: y = x² − 1 forms a parabola.

Read in:Chapter 29
Mathematics

Quadratic expression

An algebraic expression whose highest power of the variable is 2.

Example: x² + 4x + 3 is quadratic.

Read in:Chapter 20
Mathematics

Quadratic graph

A U-shaped or upside-down U-shaped graph of a quadratic function.

Example: y = x² has a U-shaped graph.

Read in:Chapter 28
Mathematics

Quadratic sequence

A sequence with constant second differences.

Example: 1, 4, 9, 16 has second differences of 2.

Read in:Chapter 25
Edexcel Business

Qualitative data

Information about opinions, reasons or experiences, usually expressed in words.

Example: Customers explain why they dislike a product design.

Read in:Chapter 33
AS & A Level Business

Qualitative factor

A non-numerical influence, such as image or employee morale.

Example: A firm considers how a move affects staff wellbeing.

Read in:Topic 9.1
AS & A Level Business

Qualitative research

Research that explores opinions, feelings and reasons.

Example: A focus group discusses why customers choose a brand.

Read in:Topic 3.2
Edexcel Business

Quality

How well a good or service meets customer expectations and requirements.

Example: A reliable phone that works as promised has good quality.

Business Studies

Quality

How well a good or service meets customer expectations and requirements.

Example: A reliable phone that works as promised has good quality.

Read in:Chapter 20
AS & A Level Business

Quality assurance

Designing processes to prevent defects from occurring.

Example: A company checks each production stage against standards.

Read in:Topic 9.2
Edexcel Business

Quality assurance

Preventing faults by checking and improving each stage of production.

Example: Workers follow procedures to prevent errors during assembly.

Read in:Chapter 45
Business Studies

Quality assurance

Preventing faults by checking and improving each stage of production.

Example: Workers follow procedures to prevent errors during assembly.

Read in:Chapter 20
Edexcel Business

Quality audit

A planned review of a business's quality procedures and results.

Example: An auditor checks whether safety inspections are recorded.

Read in:Chapter 45
Edexcel Business

Quality chain

The idea that each stage of production should pass good-quality work to the next.

Example: A packaging team checks items before dispatch.

Read in:Chapter 45
AS & A Level Business

Quality circle

A small group of employees who meet to suggest improvements.

Example: Production workers discuss ways to cut errors.

Read in:Topic 9.2
Business Studies

Quality circle

A small group of workers who meet to suggest improvements.

Example: Factory employees meet weekly to solve quality problems.

Read in:Chapter 20
Edexcel Business

Quality circles

Small groups of employees who meet to suggest ways to improve quality and work processes.

Example: Factory staff meet weekly to reduce defects.

AS & A Level Business

Quality control

Inspecting products or outputs to identify faults.

Example: A factory checks finished phones for defects.

Read in:Topic 9.2
Edexcel Business

Quality control

Checking finished products or output for defects.

Example: Inspectors test completed toys before shipment.

Business Studies

Quality control

Checking finished products or output for defects.

Example: Inspectors test completed toys before shipment.

Read in:Chapter 20
AS & A Level Economics

Quality of life

People's overall wellbeing, including health, safety and free time.

Example: Cleaner air can improve quality of life even without higher income.

Read in:Chapter 25
Economics

Quality of life

People's overall wellbeing, including health, safety and free time.

Example: Cleaner air can improve quality of life even without higher income.

Read in:Chapter 32
AS & A Level Business

Quality standard

An agreed level or measure of acceptable quality.

Example: A factory sets a maximum defect rate of 1%.

Read in:Topic 9.2
Edexcel Business

Quality standard

An agreed level or measure of acceptable quality.

Example: A factory sets a maximum defect rate of 1%.

Read in:Chapter 45
Edexcel Business

Quantitative data

Information expressed as numbers or amounts.

Example: A survey finds that 65% of customers prefer online ordering.

Read in:Chapter 33
AS & A Level Business

Quantitative factor

A measurable numerical influence on a decision.

Example: Managers compare rent and transport costs between sites.

Read in:Topic 9.1
AS & A Level Business

Quantitative research

Research that produces numerical information.

Example: A survey finds that 60% prefer home delivery.

Read in:Topic 3.2
AS & A Level Economics

Quantity demanded

How much consumers want and can buy at one particular price.

Example: At $2, buyers want 60 bottles.

Economics

Quantity demanded

How much consumers want and can buy at one particular price.

Example: At $2, buyers want 60 bottles.

Read in:Chapter 7
AS & A Level Economics

Quantity supplied

How much producers want and can sell at one particular price.

Example: At $4, producers offer 80 units.

Economics

Quantity supplied

How much producers want and can sell at one particular price.

Example: At $4, producers offer 80 units.

Read in:Chapter 8
AS & A Level Economics

Quantity theory of money

A theory connecting money supply and spending, often represented by MV = PY.

Example: With stable velocity and output, faster money growth tends to raise prices.

Read in:Chapter 27
AS & A Level Business

Quaternary sector

Activities based mainly on knowledge, research and information.

Example: A software research laboratory is in the quaternary sector.

Read in:Topic 1.2
Economics

Quaternary sector

Activities involving knowledge, information and research.

Example: Software development is often classed as quaternary activity.

Read in:Chapter 20
Computer Science

Query

A request to find or change data in a database.

Example: A query lists students in Year 10.

Read in:Topic 9.1
Edexcel Business

Question mark

A Boston matrix product with low market share in a fast-growing market.

Example: A new brand competes in a rapidly growing market.

Read in:Chapter 36
Edexcel Business

Questionnaire

A set of questions used to collect information from respondents.

Example: A business asks customers to rate its service.

Read in:Chapter 33
ICT

Questionnaire

A set of written questions used to collect opinions or information.

Example: Students complete a form about a school app.

Read in:Chapter 7
Business Studies

Questionnaire

A set of questions used to collect information from respondents.

Example: A business asks customers to rate its service.

Read in:Chapter 11
AS & A Level Economics

Quota

A legal limit on the quantity of a product that may be imported.

Example: Only 5,000 imported cars may enter per year.

Economics

Quota

A legal limit on the quantity of a product that may be imported.

Example: Only 5,000 imported cars may enter per year.

Read in:Chapter 37
Edexcel Business

Quota

A limit on the quantity of a product that can be imported.

Example: A country allows only 10,000 imported cars each year.

Read in:Chapter 9
Business Studies

Quota

A limit on the quantity of a product that can be imported.

Example: A country allows only 10,000 imported cars each year.

AS & A Level Business

Quota sample

A sample formed by filling set numbers from chosen groups.

Example: An interviewer speaks to 30 men and 30 women.

Read in:Topic 3.2
Business Studies

Quota sample

A sample chosen to include set numbers of different types of people.

Example: A survey includes 30 teenagers and 30 adults.

Read in:Chapter 11

R Dictionary terms

AS & A Level Business

Radio-frequency identification

Technology that uses radio signals to identify and track tagged items.

Example: A warehouse scans tagged boxes automatically.

Read in:Topic 9.3
Computer Science

Radio-frequency identification

Technology that reads information from a tag using radio waves.

Example: An RFID tag helps track stock in a warehouse.

Read in:Topic 3.2
Mathematics

Radius

The distance from the centre of a circle to its edge.

Example: A circle of diameter 10 cm has radius 5 cm.

Read in:Chapter 38
Computer Science

Random access memory

Temporary, usually volatile memory holding programs and data in use.

Example: A computer loads a game into RAM before running it.

ICT

Random access memory

Fast temporary memory holding programs and data while they are in use.

Example: A browser uses RAM while its tabs are open.

Read in:Chapter 1
AS & A Level Business

Random sample

A sample where everyone in the target population has an equal chance of selection.

Example: A computer chooses 50 customers at random.

Read in:Topic 3.2
Business Studies

Random sample

A sample chosen so every person in the population has an equal chance of selection.

Example: A school picks students' names using a random-number generator.

Read in:Chapter 11
Mathematics

Range

The set of output values a function actually produces.

Example: For f(x)=x² with x in {1,2,3}, the range is {1,4,9}.

Read in:Chapter 30
Computer Science

Range check

Checking that a value falls between allowed limits.

Example: An exam percentage must be between 0 and 100.

Read in:Topic 7.5
ICT

Range check

A validation rule ensuring a number is within set limits.

Example: A test score must be between 0 and 100.

Read in:Chapter 7
Computer Science

Ransomware

Malware that locks or encrypts data and demands payment.

Example: A ransomware attack prevents staff from opening files.

Read in:Topic 5.3
ICT

Ransomware

Malware that locks or encrypts data and demands payment.

Example: Ransomware makes school files inaccessible.

Read in:Chapter 8
Mathematics

Rate

A comparison of two quantities measured in different units.

Example: $12 per hour is a rate of pay.

Read in:Chapter 12
Accounting

Rate of inventory turnover

How often a business sells and replaces its average inventory during a period.

Example: Cost of sales $12,000 and average stock $3,000 give 4 times.

Mathematics

Ratio

A comparison of quantities using the same unit or compatible units.

Example: A 2:3 ratio of red to blue means 2 red for every 3 blue.

Read in:Chapter 11
AS & A Level Business

Ratio analysis

Using financial ratios to understand and compare business performance.

Example: A manager compares profit margins over three years.

Read in:Topic 10.2
Edexcel Business

Ratio analysis

Using financial ratios to understand and compare business performance.

Example: A manager compares profit margins over three years.

Read in:Chapter 31
Accounting

Ratio interpretation

Explaining what calculated ratios reveal about performance and financial position.

Example: A falling current ratio may warn of tighter cash resources.

Read in:Chapter 22
AS & A Level Economics

Rational expectations

Forecasts based on available information and an understanding of likely policy effects.

Example: Firms adjust prices after anticipating an announced tax change.

Read in:Chapter 28
Mathematics

Rational number

A number that can be written as a fraction of two integers, with a non-zero denominator.

Example: 0.75 is rational because it equals 3/4.

Read in:Chapter 1
Mathematics

Rationalise

Remove a surd from a fraction's denominator.

Example: 1/√2 can be written as √2/2.

Read in:Chapter 18
AS & A Level Economics

Rationing function

How prices limit demand when goods are scarce.

Example: A higher concert ticket price means fewer people can or will buy a ticket.

Read in:Chapter 4
AS & A Level Economics

Rationing function of price

When a high price limits how much people can afford to buy.

Example: A rise in ticket prices reduces the number of people buying them.

Read in:Chapter 4
Economics

Rationing function of price

When a high price limits how much people can afford to buy.

Example: A rise in ticket prices reduces the number of people buying them.

Read in:Chapter 6
AS & A Level Business

Raw materials

Items used to make finished products.

Example: Flour is a raw material for a bakery.

Read in:Topic 4.2
Computer Science

Read mode

Opening a file to get information without changing its contents.

Example: A program opens scores.txt for reading.

Read in:Topic 8.3
ICT

Read-only disc

A disc whose stored information is intended to be read, not rewritten.

Example: Software can be supplied on a CD-ROM.

Read in:Chapter 3
Computer Science

Read-only memory

Memory that stores instructions that are not normally changed during everyday use.

Example: Firmware may be stored in ROM.

Read in:Topic 3.3
ICT

Read-only memory

Memory that keeps essential startup instructions even when the power is off.

Example: Firmware can be stored in ROM.

Read in:Chapter 1
AS & A Level Economics

Real effective exchange rate

A trade-weighted measure of a currency's value adjusted for relative prices.

Example: A rise in the REER may make domestic exports less competitive.

Read in:Chapter 29
AS & A Level Economics

Real exchange rate

The nominal exchange rate adjusted for relative price levels between countries.

Example: Domestic prices rising faster than foreign prices can worsen price competitiveness.

Read in:Chapter 29
AS & A Level Economics

Real GDP

GDP adjusted for changes in prices, showing changes in production more clearly.

Example: If output grows 2% after adjusting for inflation, real GDP rises.

Economics

Real GDP

GDP adjusted for changes in prices, showing changes in production more clearly.

Example: If output grows 2% after adjusting for inflation, real GDP rises.

Read in:Chapter 29
AS & A Level Economics

Real income

Income adjusted for changes in prices to show purchasing power.

Example: A 2% pay rise with 4% inflation reduces real income.

Economics

Real income

Income adjusted for changes in prices to show purchasing power.

Example: A 2% pay rise with 4% inflation reduces real income.

Read in:Chapter 32
Business Studies

Real income

Income adjusted to take account of changes in prices.

Example: If wages rise more slowly than prices, real income falls.

Read in:Chapter 27
Computer Science

Real number

A number that may include a fractional part.

Example: 3.75 is a real number.

Read in:Topic 8.1
AS & A Level Economics

Real wage

A wage adjusted for changes in the price level to show purchasing power.

Example: Pay rises 3% while prices rise 5%, so the real wage falls.

Read in:Chapter 10
Computer Science

Real-time system

A system that must respond within a required time limit.

Example: An airbag controller must act very quickly.

Read in:Topic 6.1
Accounting

Realisation principle

Recognising revenue when it is earned, rather than simply when cash arrives.

Example: A credit sale is recorded when goods are sold.

Read in:Chapter 26
Mathematics

Rearrange a formula

Change the subject while keeping both sides equal.

Example: From A = lw, make w = A/l.

Read in:Chapter 23
Mathematics

Reasonable answer

A result that fits the size and context of a problem.

Example: A school bus carrying 40 people is more reasonable than 40,000.

Read in:Chapter 9
Accounting

Receipt

Written evidence that a payment has been received.

Example: A cashier gives a receipt for a $25 purchase.

Read in:Chapter 4
Accounting

Receipts and payments account

A summary of all cash and bank receipts and payments for a club during a period.

Example: It includes both equipment purchases and membership fees.

Read in:Chapter 18
AS & A Level Economics

Recession

A period when economic activity falls significantly.

Example: Factories cut production and jobs during a recession.

Economics

Recession

A period when economic activity falls significantly.

Example: Factories cut production and jobs during a recession.

Read in:Chapter 29
Mathematics

Reciprocal

A number that gives 1 when multiplied by the original number.

Example: The reciprocal of 4 is 1/4.

Mathematics

Reciprocal graph

A graph of a function such as y = 1/x with two branches.

Example: For y = 1/x, x cannot be zero.

Read in:Chapter 29
Edexcel Business

Recognition

Showing someone that their effort or achievement is valued.

Example: A manager publicly thanks staff for excellent service.

Accounting

Reconciled balance

The bank balance after timing differences and unrecorded items are explained.

Example: Both adjusted records agree at $1,250.

Read in:Chapter 8
Computer Science

Record

One complete set of related data about an item or person.

Example: One row holds a student's details.

Read in:Topic 9.1
ICT

Recordable disc

A blank optical disc that can usually be written to once.

Example: A CD-R can be used to make a permanent copy.

Read in:Chapter 3
AS & A Level Business

Recruitment

Finding and attracting people to apply for a job.

Example: A company advertises for a sales assistant.

Read in:Topic 2.1
Edexcel Business

Recruitment

Finding and attracting people to apply for a job.

Example: A company advertises for a new receptionist.

Business Studies

Recruitment

Finding and attracting people to apply for a job.

Example: A company advertises for a new receptionist.

Read in:Chapter 8
AS & A Level Business

Red ocean strategy

Competing in an established market where many firms seek the same customers.

Example: Two airlines fight for passengers on the same route.

Read in:Topic 6.2
AS & A Level Economics

Redistribution of income

Policies that reduce differences in incomes by transferring resources between people.

Example: Higher-income earners pay taxes that fund support for low-income households.

Read in:Chapter 22
Economics

Redistribution of income

Policies that reduce differences in incomes by transferring resources between people.

Example: Higher-income earners pay taxes that fund support for low-income households.

Read in:Chapter 24
Accounting

Reducing balance method

A depreciation method charging a fixed percentage of the asset's remaining value each year.

Example: At 20%, a $1,000 asset loses $200 in year one and $160 in year two.

Read in:Chapter 11
AS & A Level Business

Redundancy

When an employee's job is no longer needed.

Example: A factory closes a production line and removes some roles.

Read in:Topic 2.1
Edexcel Business

Redundancy

When someone's job is no longer needed, rather than the employee personally being at fault.

Example: A factory reduces staff after closing a production line.

Read in:Chapter 24
Business Studies

Redundancy

When someone's job is no longer needed, rather than the employee personally being at fault.

Example: A factory reduces staff after closing a production line.

Read in:Chapter 8
Mathematics

Reflection

A transformation creating a mirror image across a line.

Example: Reflect (2,3) in the y-axis to get (−2,3).

Mathematics

Reflex angle

An angle bigger than 180° but smaller than 360°.

Example: 240° is reflex.

Read in:Chapter 32
Computer Science

Register

A very small, fast storage location inside the processor.

Example: The accumulator holds a value being used in a calculation.

Read in:Topic 3.1
Economics

Regressive tax

A tax that takes a larger percentage of income from poorer people than richer people.

Example: A flat sales tax uses more of a low-income family's budget.

Read in:Chapter 26
AS & A Level Economics

Regulation

A rule used by government to control an activity.

Example: Factories must meet emissions standards.

Economics

Regulation

A rule used by government to control an activity.

Example: Factories must meet emissions standards.

Read in:Chapter 15
AS & A Level Economics

Regulatory capture

When a regulator begins acting in the interests of the industry it supervises.

Example: A regulator sets weak safety rules after pressure from large firms.

Read in:Chapter 21
Computer Science

Relational database

A database that stores related information in linked tables.

Example: Orders and Customers tables can be connected by CustomerID.

Read in:Topic 9.1
AS & A Level Economics

Relative poverty

Having much less income than is normal in your society.

Example: A family earns far below the country's typical household income.

Read in:Chapter 22
Economics

Relative poverty

Having much less income than is normal in your society.

Example: A family earns far below the country's typical household income.

Read in:Chapter 33
Accounting

Relevance

Information being useful for a decision a person needs to make.

Example: Recent sales figures help an owner decide what to restock.

Read in:Chapter 27
Accounting

Relevance-reliability trade-off

A choice between using timely useful information and waiting for more certain evidence.

Example: An early estimate may help decisions but be less certain than a final figure.

Read in:Chapter 27
Accounting

Reliability

Information being dependable and reasonably free from important errors or bias.

Example: A verified invoice makes an expense figure more reliable.

Read in:Chapter 27
AS & A Level Business

Reliability

How consistently research would give similar results if repeated.

Example: A reliable survey produces similar findings in repeat tests.

Read in:Topic 3.2
Edexcel Business

Reliability

How consistently research would give similar results if repeated.

Example: A reliable survey produces similar findings in repeat tests.

AS & A Level Business

Relocation

Moving business operations from one place to another.

Example: A factory moves to a larger industrial site.

Read in:Topic 9.1
Edexcel Business

Relocation

Moving business operations from one place to another.

Example: A factory moves to a larger industrial site.

Economics

Remittance

Money sent by a person working away from home to people in another place or country.

Example: A worker abroad sends part of their wages to family.

Read in:Chapter 39
AS & A Level Economics

Rent

Payment for using land or property.

Example: A shop pays rent for its premises.

Economics

Rent

Payment for using land or property.

Example: A shop pays rent for its premises.

Read in:Chapter 2
AS & A Level Business

Reorder level

The inventory level at which a new order should be placed.

Example: A factory orders more screws when stock falls to 500.

Read in:Topic 4.2
AS & A Level Business

Reorder quantity

The number of units ordered each time inventory is replenished.

Example: A warehouse orders 1,000 boxes per delivery.

Read in:Topic 4.2
Edexcel Business

Repatriation of profits

Sending profits earned in another country back to the company's home country.

Example: A multinational transfers earnings from a foreign branch to its headquarters.

Read in:Chapter 10
Computer Science

Repeat until loop

A loop that repeats at least once and stops when a condition becomes true.

Example: REPEAT asking for a password UNTIL it is valid.

Read in:Topic 8.1
Mathematics

Repeated multiplication

Multiplying the same factor several times.

Example: 5 × 5 × 5 is repeated multiplication.

Read in:Chapter 7
ICT

Repetitive strain injury

Pain or damage caused by repeating the same movement too often.

Example: Long periods of typing without breaks can cause RSI.

Read in:Chapter 5
AS & A Level Economics

Reserve assets

Foreign-currency assets and related reserves held by a central bank.

Example: A central bank sells foreign reserves to support its currency.

Accounting

Reserves

Profits or amounts retained in a company rather than paid out immediately.

Example: A company keeps $8,000 profits as retained earnings.

Read in:Chapter 17
AS & A Level Business

Reshoring

Bringing business activities back to the home country.

Example: A company returns production to a domestic factory.

Read in:Topic 9.1
Accounting

Residual value

The expected amount an asset can be sold for at the end of its useful life.

Example: A van may have a residual value of $1,000.

Read in:Chapter 11
AS & A Level Economics

Resource allocation

How an economy decides where labour, land and capital are used.

Example: More workers move into healthcare when demand increases.

Economics

Resource allocation

How an economy decides where labour, land and capital are used.

Example: More workers move into healthcare when demand increases.

Edexcel Business

Resource depletion

Using natural resources faster than they can be replaced.

Example: Heavy fishing can reduce fish stocks.

Read in:Chapter 13
Edexcel Business

Resource utilisation

How effectively a business uses its labour, equipment, materials and time.

Example: A workshop schedules machines to reduce idle time.

Read in:Chapter 42
AS & A Level Economics

Resources

Things used to make goods and services.

Example: Workers, machines and land are resources.

Economics

Resources

Things used to make goods and services.

Example: Workers, machines and land are resources.

Edexcel Business

Resources

Things used to make goods and services.

Example: Workers, machines and land are resources.

AS & A Level Business

Responsibility

The duty to complete an assigned task or role.

Example: A supervisor is responsible for daily safety checks.

Read in:Topic 7.1
Edexcel Business

Responsibility

The duty to complete an assigned task or role.

Example: A supervisor is responsible for daily safety checks.

Mathematics

Restriction

A value that is not allowed because it would make a denominator zero.

Example: For 1/(x − 2), x cannot equal 2.

Read in:Chapter 21
Mathematics

Resultant vector

The single vector equivalent to adding two or more vectors.

Example: Right 2 then right 3 gives a resultant 5 right.

Read in:Chapter 43
Edexcel Business

Retailer

A business that sells goods directly to final consumers.

Example: A supermarket is a retailer.

Read in:Chapter 38
Business Studies

Retailer

A business that sells goods directly to final consumers.

Example: A supermarket is a retailer.

Accounting

Retained earnings

Profits kept in the company after dividends rather than distributed.

Example: The company keeps part of this year's profit to fund expansion.

Read in:Chapter 17
AS & A Level Business

Retained earnings

Profit kept in the business instead of being paid to owners as dividends.

Example: A company reinvests $15,000 of its annual profit.

AS & A Level Business

Retained profit

Profit kept in the business rather than distributed to owners.

Example: A company reinvests $6,000 of its annual profit.

Read in:Topic 10.1
Edexcel Business

Retained profit

Profit kept in the business rather than paid out to owners.

Example: A shop uses last year's profit to open another branch.

Business Studies

Retained profit

Profit kept in the business rather than paid out to owners.

Example: A shop uses last year's profit to open another branch.

Accounting

Return on capital employed

Profit compared with capital employed, usually shown as a percentage.

Example: $4,000 profit on $20,000 capital employed gives 20% ROCE.

AS & A Level Business

Return on capital employed

Operating profit as a percentage of capital employed.

Example: A $20,000 operating profit on $200,000 capital employed gives 10% ROCE.

Read in:Topic 10.2
Edexcel Business

Return on capital employed

Profit from operations expressed as a percentage of capital employed.

Example: A firm earns $20,000 operating profit on $100,000 capital: ROCE is 20%.

Read in:Chapter 31
Business Studies

Return on capital employed

Profit from operations expressed as a percentage of capital employed.

Example: A firm earns $20,000 operating profit on $100,000 capital: ROCE is 20%.

Read in:Chapter 26
AS & A Level Business

Return on investment

The financial gain from an investment compared with its cost.

Example: A project earns $5,000 on a $25,000 investment, a 20% return.

Read in:Topic 10.4
Accounting

Returns inwards journal

A book that records goods returned by customers after credit sales.

Example: A returned $30 item is entered in this journal.

Read in:Chapter 5
Accounting

Returns outwards journal

A book that records goods returned to suppliers after credit purchases.

Example: The return of $50 of stock goes in this journal.

Read in:Chapter 5
AS & A Level Economics

Returns to scale

How output changes when all inputs rise by the same proportion in the long run.

Example: Doubling every input and tripling output shows increasing returns to scale.

Read in:Chapter 17
AS & A Level Economics

Revaluation

A deliberate increase in an official exchange rate in a fixed-rate system.

Example: The authorities set a higher official currency value.

Read in:Chapter 29
Economics

Revaluation

A deliberate increase in an official exchange rate in a fixed-rate system.

Example: The authorities set a higher official currency value.

Read in:Chapter 38
Accounting

Revaluation method

A method of finding depreciation by comparing an asset's value at the start and end of a period, allowing for purchases.

Example: Small tools may be valued at the end of each year.

Read in:Chapter 11
Edexcel Business

Revenue

Money received or earned from selling goods and services before costs are deducted.

Example: A shop sells 10 shirts for $20 each, earning $200 revenue.

Business Studies

Revenue

Money received or earned from selling goods and services before costs are deducted.

Example: A shop sells 10 shirts for $20 each, earning $200 revenue.

Accounting

Revenue expenditure

Money spent on everyday running costs of a business.

Example: Paying monthly electricity is revenue expenditure.

Read in:Chapter 10
AS & A Level Business

Revenue expenditure

Spending on daily operating expenses.

Example: Paying electricity bills is revenue expenditure.

Read in:Topic 5.1
Business Studies

Revenue expenditure

Money spent on day-to-day running costs.

Example: Paying electricity bills is revenue expenditure.

Read in:Chapter 22
Accounting

Revenue receipt

Money received through normal trading or regular business income.

Example: Money received for services is a revenue receipt.

Read in:Chapter 10
Accounting

Reversal of entries

An error where the correct accounts are used but the debit and credit sides are swapped.

Example: A cash sale is wrongly recorded as Dr Sales and Cr Cash instead of Dr Cash and Cr Sales.

Read in:Chapter 7
Mathematics

Reverse percentage

Finding an original value when the final value and percentage change are known.

Example: If a price after 20% off is $80, the original was $100.

Read in:Chapter 13
Mathematics

Reverse the inequality

Change the direction of an inequality sign when multiplying or dividing by a negative.

Example: From −2x > 6, dividing by −2 gives x < −3.

Read in:Chapter 24
Economics

Reward for labour

The pay workers receive for their effort.

Example: A worker receives a weekly wage.

Read in:Chapter 2
ICT

Rewritable disc

An optical disc that can be erased and written to again.

Example: A CD-RW can hold temporary files.

Read in:Chapter 3
ICT

RFID reader

A device that reads a nearby radio-frequency tag.

Example: A library scans tagged books without typing their codes.

Read in:Chapter 2
AS & A Level Business

Rights issue

Offering new shares to existing shareholders, usually in proportion to their holdings.

Example: A listed company asks current investors to buy additional shares.

Read in:Topic 5.2
Edexcel Business

Risk-bearing economies

Lower average risk when a large business sells many different products or serves different markets.

Example: Weak sales in one product line are offset by another.

Read in:Chapter 40
Computer Science

Robot

A programmable machine that can sense or act in its environment.

Example: A factory robot welds vehicle parts.

Read in:Topic 6.2
ICT

Robot

A programmable machine that can perform physical tasks automatically.

Example: A robotic arm assembles parts in a factory.

Read in:Chapter 6
Computer Science

Robot actuator

A mechanism that creates movement or physical action in a robot.

Example: A motor turns a robot's wheels.

Read in:Topic 6.2
Computer Science

Robot sensor

A device that helps a robot detect its surroundings or state.

Example: A robot uses a distance sensor to avoid a wall.

Read in:Topic 6.2
Computer Science

Robotic arm

A mechanical arm with joints that can be programmed to move.

Example: A robotic arm places items onto a conveyor belt.

Read in:Topic 6.2
Computer Science

Robotics

The design, construction and use of robots.

Example: Engineers study robotics to build automated machines.

Read in:Topic 6.2
Edexcel Business

Robotics

The design and use of robots to carry out tasks.

Example: Robots weld panels in a car factory.

Read in:Chapter 43
Mathematics

Root

A value of x that makes a function equal zero.

Example: The roots of x² − 4 = 0 are −2 and 2.

Read in:Chapter 28
Mathematics

Rotation

Turning a shape around a fixed point by a given angle.

Example: A 90° clockwise turn about the origin is a rotation.

Read in:Chapter 42
Mathematics

Rotational symmetry

A shape's property of fitting onto itself after a turn less than 360°.

Example: A rectangle matches itself after a half-turn.

Read in:Chapter 36
Mathematics

Rounding

Replacing a number with a nearby, simpler value.

Example: Round 6.78 to one decimal place to get 6.8.

Computer Science

Router

A device that sends packets between different networks.

Example: A home router connects local devices to the internet.

Read in:Topic 3.4
ICT

Router

A network device that directs data between different networks.

Example: A home router sends data to the internet.

Read in:Chapter 4
Accounting

Routine repair

Spending to keep an asset in its existing working condition.

Example: Replacing worn machine belts is a revenue expense.

Read in:Chapter 10
Computer Science

Run-length encoding

A compression method that records repeated values as a value and a count.

Example: AAAAA can be stored as five As.

Read in:Topic 1.3
Computer Science

Runtime error

An error that happens while a program is running.

Example: Dividing by zero may cause a runtime error.

Read in:Topic 7.8

S Dictionary terms

Edexcel Business

Safety needs

People's need for security, stability and protection from harm.

Example: Safe working conditions help employees feel secure.

Read in:Chapter 21
Economics

Salary

A fixed payment for work, usually stated per month or year.

Example: An office worker earns a monthly salary.

Read in:Chapter 18
Business Studies

Salary

A fixed amount of pay, usually stated per month or year.

Example: An office worker earns a salary of $24,000 per year.

Read in:Chapter 6
Edexcel Business

Sale of assets

Raising money by selling property or equipment owned by the business.

Example: A firm sells an unused van to increase cash.

Read in:Chapter 25
Accounting

Sales

Goods or services provided to customers in return for payment.

Example: A shop sells a bicycle for $200.

Read in:Chapter 3
AS & A Level Business

Sales forecast

An estimate of how many goods or services a business expects to sell.

Example: A manufacturer predicts 5,000 units next quarter.

Read in:Topic 8.2
Accounting

Sales journal

A book that records credit sales of goods for resale.

Example: A $300 credit sale is entered in the sales journal.

Read in:Chapter 5
Accounting

Sales ledger control account

A summary account showing the total owed by credit customers.

Example: Customers together owe $7,200.

Read in:Chapter 9
Edexcel Business

Sales price

The amount customers pay for one unit of a product.

Example: A shop charges £25 for one backpack.

Read in:Chapter 28
Edexcel Business

Sales promotion

A short-term offer intended to increase sales.

Example: A shop offers 'buy one, get one free'.

Business Studies

Sales promotion

A short-term offer intended to increase sales.

Example: A shop offers 'buy one, get one free'.

Read in:Chapter 15
Accounting

Sales returns

Goods returned by customers after they were sold.

Example: A customer brings back a faulty bicycle.

Read in:Chapter 3
AS & A Level Economics

Sales revenue

The money a firm receives from selling its products.

Example: Selling 200 books at $5 each earns $1,000 in sales revenue.

Read in:Chapter 20
Economics

Sales revenue

The money a firm receives from selling its products.

Example: Selling 200 books at $5 each earns $1,000 in sales revenue.

Read in:Chapter 20
Edexcel Business

Sales revenue

The money a firm receives from selling its products.

Example: Selling 200 books at $5 each earns $1,000 in sales revenue.

Read in:Chapter 2
AS & A Level Economics

Sales revenue maximisation

Aiming to make total sales revenue as high as possible, subject to constraints.

Example: A firm lowers price to expand sales up to the revenue-maximising output.

Read in:Chapter 20
AS & A Level Economics

Sales tax

A tax on the sale of goods or services that usually increases their price.

Example: A shop collects sales tax on a purchase.

Read in:Chapter 2
Economics

Sales tax

A tax on the sale of goods or services that usually increases their price.

Example: A shop collects sales tax on a purchase.

Read in:Chapter 10
Edexcel Business

Sample

A smaller group selected to represent a wider population in research.

Example: A researcher interviews 100 customers from a city.

Read in:Chapter 33
Mathematics

Sample

A smaller group chosen from a population.

Example: Surveying 50 students is taking a sample.

Read in:Chapter 45
Computer Science

Sample rate

The number of sound measurements recorded each second.

Example: A sound recording at 44,100 Hz takes 44,100 samples per second.

Read in:Topic 1.2
Computer Science

Sample resolution

The number of bits used to represent each sound sample.

Example: A 16-bit sample can store more levels than an 8-bit sample.

Read in:Topic 1.2
AS & A Level Business

Sampling

Selecting part of a population to represent the whole.

Example: A school surveys 100 of its 1,000 students.

Read in:Topic 3.2
Computer Science

Sampling

Taking measurements of an analogue signal at regular intervals.

Example: A microphone recording is sampled thousands of times each second.

Read in:Topic 1.2
Business Studies

Sampling

Choosing a smaller group of people to represent a larger population.

Example: A business asks 100 customers rather than all 10,000 customers.

Read in:Chapter 11
ICT

Satellite navigation

Technology that uses satellite signals to guide a user from one location to another.

Example: A driver follows directions from a sat-nav.

Read in:Chapter 6
AS & A Level Business

Satisficing

Aiming for an acceptable outcome rather than the absolute maximum.

Example: An owner accepts a steady income to have more free time.

Read in:Topic 1.4
AS & A Level Economics

Satisficing

Choosing an outcome that is good enough instead of maximising one objective.

Example: A manager accepts satisfactory profit to protect work-life balance.

Read in:Chapter 20
Edexcel Business

Saturation

A stage when most potential customers already own or use a product.

Example: Smartphone sales slow once nearly everyone has one.

Read in:Chapter 36
AS & A Level Economics

Saving

Keeping part of income to use later instead of spending it now.

Example: A household sets aside $30 every month.

Economics

Saving

Keeping part of income to use later instead of spending it now.

Example: A household sets aside $30 every month.

Mathematics

Scalar multiplication

Multiplying a vector by a number to change its size or direction.

Example: 2(3,1) = (6,2).

Read in:Chapter 43
Mathematics

Scale drawing

A drawing where lengths are a fixed fraction or multiple of real lengths.

Example: At 1:100, 2 cm represents 2 m.

Read in:Chapter 34
Mathematics

Scale factor

A number by which every corresponding length is multiplied.

Example: A scale factor of 3 triples each length.

ICT

Scanner

An input device that turns a paper document or picture into digital data.

Example: A scanner creates a digital copy of a worksheet.

Read in:Chapter 2
AS & A Level Business

Scarcity

When resources are limited but wants are unlimited.

Example: A factory has only enough workers to make one of two products.

Read in:Topic 1.1
AS & A Level Economics

Scarcity

There are not enough resources to satisfy everyone's wants.

Example: There is only enough land to build either a hospital or a park.

Read in:Chapter 1
Economics

Scarcity

There are not enough resources to satisfy everyone's wants.

Example: There is only enough land to build either a hospital or a park.

Edexcel Business

Scarcity

There are not enough resources to provide everything everyone wants.

Example: A school has money for either new computers or new desks, but not both.

Business Studies

Scarcity

There are not enough resources to provide everything everyone wants.

Example: A school has money for either new computers or new desks, but not both.

Read in:Chapter 1
Mathematics

Scatter diagram

A graph of paired numerical values used to look for a relationship.

Example: Plotting height against shoe size makes a scatter diagram.

Read in:Chapter 46
AS & A Level Business

Scenario planning

Exploring different possible futures and preparing suitable responses.

Example: Managers plan what to do if interest rates rise sharply.

Read in:Topic 6.2
ICT

School management system

Software that stores and manages school information.

Example: Teachers record attendance in a school system.

Read in:Chapter 6
AS & A Level Business

Scientific management

Taylor's approach of analysing tasks to find efficient working methods and rewards.

Example: A factory times tasks and uses output-related pay.

Read in:Topic 2.2
Mathematics

Scientific notation

Another name for writing numbers using powers of ten.

Example: 6.2 × 10⁵ represents 620,000.

Read in:Chapter 14
ICT

Screen glare

Bright reflections on a display that make it harder to see.

Example: Moving a monitor away from a window reduces glare.

Read in:Chapter 5
ICT

Screen reader

Software that reads on-screen text aloud or provides it to a braille display.

Example: A visually impaired learner uses a screen reader.

Read in:Chapter 9
ICT

Search engine

A service that helps users find information on the web.

Example: A learner searches for a topic using a search engine.

Read in:Chapter 10
Edexcel Business

Seasonal demand

Customer demand that changes predictably at different times of year.

Example: An ice-cream shop sells more in summer.

AS & A Level Economics

Seasonal unemployment

Unemployment caused by jobs being available only at certain times of year.

Example: Some tourist workers lose jobs during the off-season.

Read in:Chapter 9
Economics

Seasonal unemployment

Unemployment caused by jobs being available only at certain times of year.

Example: Some tourist workers lose jobs during the off-season.

Read in:Chapter 30
AS & A Level Economics

Secondary income

Transfers of money between countries without goods or services being exchanged.

Example: Money sent to relatives abroad is a secondary income transfer.

Read in:Chapter 13
Economics

Secondary income

Transfers of money between countries without goods or services being exchanged.

Example: Money sent to relatives abroad is a secondary income transfer.

Read in:Chapter 39
AS & A Level Business

Secondary research

Information already collected by someone else.

Example: A company uses government population statistics.

Read in:Topic 3.2
Edexcel Business

Secondary research

Information already collected by somebody else.

Example: A company reads government statistics about local incomes.

Read in:Chapter 33
Business Studies

Secondary research

Information already collected by somebody else.

Example: A company reads government statistics about local incomes.

Read in:Chapter 11
AS & A Level Business

Secondary sector

Businesses that turn materials into finished or partly finished goods.

Example: A car factory is in the secondary sector.

Read in:Topic 1.2
Economics

Secondary sector

Businesses turning raw materials into products.

Example: A car factory is in the secondary sector.

Edexcel Business

Secondary sector

Businesses that turn raw materials into finished or partly finished goods.

Example: A furniture factory is in the secondary sector.

Read in:Chapter 7
Business Studies

Secondary sector

Businesses that turn raw materials into finished or partly finished goods.

Example: A furniture factory is in the secondary sector.

Read in:Chapter 2
Computer Science

Secondary storage

Storage used to keep data and programs for later use.

Example: An SSD saves files when the power is off.

Read in:Topic 3.3
Edexcel Business

Sector

A broad category of economic activity such as agriculture, industry or services.

Example: Banking operates in the tertiary sector.

Mathematics

Sector

A region bounded by two radii and the arc between them.

Example: A quarter-circle is a 90° sector.

Read in:Chapter 38
ICT

Secure Sockets Layer

An older name for technology that encrypts information sent between devices; modern secure connections use TLS.

Example: Modern HTTPS connections use TLS rather than old SSL.

Read in:Chapter 8
ICT

Security token

A physical device or digital code used to prove identity.

Example: A login system sends a one-time code to a phone.

Read in:Chapter 4
AS & A Level Business

Selection

Choosing the most suitable applicant from those who applied.

Example: The manager interviews candidates and makes an offer.

Read in:Topic 2.1
Computer Science

Selection

Choosing which instructions run based on a condition.

Example: IF age >= 16 THEN display a message.

Read in:Topic 7.3
Edexcel Business

Selection

Choosing the most suitable applicant from those who applied.

Example: A manager interviews candidates and chooses one.

Read in:Chapter 18
Business Studies

Selection

Choosing the most suitable applicant from those who applied.

Example: A manager interviews candidates and chooses one.

Read in:Chapter 8
Edexcel Business

Self-actualisation

Achieving personal potential through learning, challenge and growth.

Example: A worker develops new skills and takes on creative projects.

Read in:Chapter 21
AS & A Level Business

Self-awareness

Understanding your own emotions, strengths and weaknesses.

Example: A manager knows impatience affects their decisions.

Read in:Topic 7.3
Edexcel Business

Selling expenses

Costs incurred to sell and distribute products.

Example: Sales commission and delivery advertising are selling expenses.

Read in:Chapter 29
Edexcel Business

Semi-finished goods

Products partly processed but needing more work before final sale.

Example: Steel sheets are used to make car body panels.

Read in:Chapter 7
ICT

Sensitive personal data

Personal information that requires particular care because misuse could cause harm.

Example: Medical information needs extra protection.

Read in:Chapter 8
AS & A Level Business

Sensitivity analysis

Testing how changing an assumption affects a decision or result.

Example: A firm calculates NPV again using lower expected sales.

Read in:Topic 10.3
Computer Science

Sensor

A device that measures a condition such as temperature or light.

Example: A sensor detects heat in a room.

ICT

Sensor

A device that measures a physical condition such as light, heat or pressure.

Example: A temperature sensor measures the heat in a greenhouse.

Read in:Chapter 2
Computer Science

Sequence

Running instructions in order, one after another.

Example: Input a number, multiply it by two, then display it.

Read in:Topic 7.3
Mathematics

Sequence

An ordered list of numbers following a rule.

Example: 3, 6, 9, 12 is a sequence.

Read in:Chapter 25
ICT

Serial access

Finding data by reading stored information in sequence.

Example: A tape drive winds through earlier data to reach a file.

Read in:Chapter 3
Computer Science

Serial transmission

Sending data one bit after another along a channel.

Example: USB connections use serial communication.

Read in:Topic 2.1
Accounting

Service business

A business that mainly sells services instead of goods.

Example: A repair workshop charges customers for labour.

Read in:Chapter 15
AS & A Level Economics

Services

Activities provided for other people rather than physical products.

Example: A haircut and a bus journey are services.

Economics

Services

Activities provided for other people rather than physical products.

Example: A haircut and a bus journey are services.

Read in:Chapter 1
Edexcel Business

Services

Activities done for customers rather than physical products.

Example: Haircuts and repairs are services.

Business Studies

Services

Activities done for customers rather than physical products.

Example: Haircuts and repairs are services.

Mathematics

Set

A collection of objects or numbers treated as a group.

Example: The vowels form the set {a, e, i, o, u}.

Read in:Chapter 2
Accounting

Share capital

Money raised by a company through issuing shares.

Example: A company issues 1,000 shares at $1 each, raising $1,000.

Read in:Chapter 17
AS & A Level Business

Share capital

Money raised by issuing shares to investors.

Example: A company sells new shares to fund expansion.

Read in:Topic 5.2
Edexcel Business

Share capital

Money raised when a company sells shares.

Example: A company issues shares to fund expansion.

Business Studies

Share capital

Money raised when a company sells shares.

Example: A company issues shares to fund expansion.

Read in:Chapter 22
Accounting

Shareholder

A person or organisation that owns shares in a company.

Example: Buying 100 shares makes a person a shareholder.

Read in:Chapter 17
AS & A Level Business

Shareholder

A person or organisation that owns shares in a company.

Example: An investor owns 100 shares in a retailer.

Read in:Topic 1.5
Business Studies

Shareholder

A person or organisation that owns shares in a company.

Example: A shareholder may receive part of a company's profits.

AS & A Level Business

Shareholder concept

The view that a business should give priority to owners' interests.

Example: Management focuses strongly on shareholder returns.

Read in:Topic 1.5
Edexcel Business

Shareholder satisfaction

How pleased company owners are with returns and business performance.

Example: Shareholders are satisfied when dividends grow sustainably.

Read in:Chapter 14
Edexcel Business

Shareholders

People or organisations that own shares in a company.

Example: Shareholders may vote at a company's annual general meeting.

Edexcel Business

Shareholders equity

The owners' interest in a company after liabilities are deducted from assets.

Example: If assets are $50,000 and liabilities $30,000, equity is $20,000.

Read in:Chapter 30
Business Studies

Shareholders' equity

The owners' interest in a company after liabilities are deducted from assets.

Example: If assets are $50,000 and liabilities $30,000, equity is $20,000.

Read in:Chapter 25
Edexcel Business

Shares

Units of ownership in a company.

Example: Buying 100 shares gives a person a small ownership stake.

Read in:Chapter 4
AS & A Level Economics

Short run

A period when at least one factor of production is fixed.

Example: A café cannot instantly expand its building when orders rise.

AS & A Level Economics

Short-run aggregate supply

Output firms will supply as the price level changes before all input prices fully adjust.

Example: Higher output prices may raise production while some wages are fixed.

Read in:Chapter 7
AS & A Level Economics

Short-run Phillips curve

A model showing a possible short-term trade-off between inflation and unemployment.

Example: A demand stimulus may reduce unemployment but raise inflation.

Read in:Chapter 28
Edexcel Business

Short-term finance

Funding usually repaid or used within one year.

Example: An overdraft helps cover a temporary cash shortage.

Read in:Chapter 25
Edexcel Business

Shortlisting

Selecting applicants who best match the job requirements for the next recruitment stage.

Example: Five candidates are invited to interview from 60 applications.

Read in:Chapter 18
ICT

Shoulder surfing

Secretly watching someone type or view private information.

Example: A thief watches a person enter a card PIN.

Read in:Chapter 8
AS & A Level Economics

Shutdown point

The output and price condition where a firm is indifferent between operating and closing temporarily.

Example: In the short run, a firm shuts down if price cannot cover average variable cost.

Read in:Chapter 18
Computer Science

Sign bit

A bit that helps indicate whether a signed binary value is negative.

Example: An 8-bit two's-complement value beginning with 1 is negative.

Read in:Topic 1.1
AS & A Level Economics

Signalling function

How a price change communicates information about scarcity and consumer demand.

Example: A rise in the price of cocoa tells producers that cocoa is relatively scarce.

Read in:Chapter 4
Business Studies

Significant

Large or important enough to matter.

Example: A significant price rise could reduce customer demand.

Read in:
Mathematics

Significant figures

The digits that show a number's precision, counting from its first non-zero digit.

Example: 4,762 to two significant figures is 4,800.

Read in:Chapter 9
Mathematics

Similar shapes

Shapes with matching angles and sides in a constant ratio.

Example: Two squares with side lengths 2 and 5 are similar.

Read in:Chapter 35
Mathematics

Simple interest

Interest calculated only on the original amount of money.

Example: 5% simple interest on $200 adds $10 each year.

Computer Science

Simplex

Communication that goes in only one direction.

Example: A television broadcast to a receiver is simplex.

Read in:Topic 2.1
Mathematics

Simplify a fraction

Write a fraction in an equivalent form with fewer factors.

Example: 8/12 simplifies to 2/3.

Read in:Chapter 21
Mathematics

Simplify a ratio

Divide each part of a ratio by the same common factor.

Example: 6:9 simplifies to 2:3.

Read in:Chapter 11
Mathematics

Simplify a surd

Rewrite a root using the largest square factor possible.

Example: √12 = 2√3.

Read in:Chapter 18
Mathematics

Simultaneous equations

Two or more equations solved together to find values satisfying all of them.

Example: x + y = 5 and x − y = 1 give x = 3 and y = 2.

Read in:Chapter 23
Mathematics

Sine

A trigonometric ratio: opposite side divided by hypotenuse in a right triangle.

Example: If opposite = 3 and hypotenuse = 5, sine = 3/5.

Read in:Chapter 41
Mathematics

Sketch

To draw an approximate graph showing its important features.

Example: A sketch of y = x² should show its U shape.

Read in:Chapter 29
Edexcel Business

Sleeping partner

A partner who invests in a business but does not normally manage its daily operations.

Example: A silent investor contributes money to a local firm.

Read in:Chapter 3
Economics

Small firm

A business with a relatively small size measured by staff, sales or capital.

Example: A family-owned corner shop is a small firm.

Read in:Chapter 20
ICT

Smart card

A plastic card containing a chip that stores or processes information.

Example: A student uses a smart card to enter a library.

Read in:Chapter 4
ICT

Smart home

A home with connected devices that can be monitored or controlled automatically.

Example: Smart lighting switches on at sunset.

Read in:Chapter 5
AS & A Level Business

SMART objective

A target that is specific, measurable, achievable, relevant and time-bound.

Example: Increase online sales by 15% by December.

Read in:Topic 1.4
Edexcel Business

SMART objectives

Targets that are specific, measurable, achievable, relevant and time-bound.

Example: A café aims to increase monthly sales by 10% within six months.

Read in:Chapter 2
ICT

Smishing

Phishing carried out through text messages.

Example: A fake delivery SMS asks a user to open a link.

Read in:Chapter 8
AS & A Level Business

Social audit

A review of a business's social and environmental impacts.

Example: A company measures how its activities affect local residents.

Read in:Topic 6.1
AS & A Level Economics

Social benefit

The total benefit to society, including private and external benefits.

Example: Education benefits the student and other people.

Economics

Social benefit

The total benefit to society, including private and external benefits.

Example: Education benefits the student and other people.

Read in:Chapter 14
AS & A Level Economics

Social cost

The total cost to society, including private costs and external costs.

Example: A factory's social cost includes its expenses and pollution damage.

Economics

Social cost

The total cost to society, including private costs and external costs.

Example: A factory's social cost includes its expenses and pollution damage.

Read in:Chapter 14
Business Studies

Social cost

The total cost of an activity to society, including private and external costs.

Example: A factory's social costs include its expenses and local pollution.

Read in:Chapter 28
Computer Science

Social engineering

Manipulating people into revealing information or taking unsafe actions.

Example: An attacker pretends to be IT support to request a password.

Read in:Topic 5.3
AS & A Level Business

Social enterprise

A business that trades to achieve social or environmental aims alongside financial sustainability.

Example: A café reinvests earnings into training disadvantaged young people.

Read in:Topic 1.2
Edexcel Business

Social enterprise

A business that mainly aims to achieve a social or environmental goal while trading.

Example: A café uses its earnings to train unemployed people.

Business Studies

Social enterprise

A business that mainly aims to achieve a social or environmental goal while trading.

Example: A café uses its earnings to train unemployed people.

Read in:Chapter 5
ICT

Social interaction

Communication and contact between people.

Example: Video calls can help distant relatives stay in touch.

Read in:Chapter 5
Edexcel Business

Social media marketing

Using social platforms to promote a business and connect with customers.

Example: A bakery posts photos of new cakes to attract buyers.

Read in:Chapter 39
Business Studies

Social media marketing

Using social platforms to promote a business and connect with customers.

Example: A bakery posts photos of new cakes to attract buyers.

Read in:Chapter 16
Edexcel Business

Social needs

The need to belong, form friendships and feel accepted.

Example: Team activities can help workers feel part of a group.

Read in:Chapter 21
ICT

Social networking

Using online platforms to share content and connect with other people.

Example: Friends share updates through a social network.

Read in:Chapter 10
Edexcel Business

Social objectives

Goals that benefit people or the environment as well as the business.

Example: A café aims to employ people with disabilities.

Read in:Chapter 2
Business Studies

Social responsibility

A business considering its effects on people and the environment, not only profit.

Example: A manufacturer improves workers' safety and cuts pollution.

Read in:Chapter 28
Edexcel Business

Socioeconomic group

A category of people based on features such as occupation and social or economic position.

Example: An advertiser uses occupation groups to plan promotions.

Read in:Chapter 35
AS & A Level Business

Soft human resource management

An approach that treats employees as valuable assets and invests in their development.

Example: A company uses coaching and participation to retain staff.

Read in:Topic 7.4
ICT

Software

Programs and instructions that tell a computer what to do.

Example: A word processor is software.

Read in:Chapter 1
ICT

Software piracy

Using or sharing software without the required permission or licence.

Example: Someone copies paid software and distributes it illegally.

Read in:Chapter 9
Accounting

Sole trader

A business owned and operated by one person.

Example: A self-employed hairdresser is a sole trader.

Read in:Chapter 15
AS & A Level Business

Sole trader

A business owned by one person who usually has unlimited liability.

Example: One person owns and runs a local repair shop.

Read in:Topic 1.2
AS & A Level Economics

Sole trader

A business owned and controlled by one person.

Example: A self-employed plumber runs a sole-trader business.

Read in:Chapter 17
Economics

Sole trader

A business owned and controlled by one person.

Example: A self-employed plumber runs a sole-trader business.

Read in:Chapter 20
Edexcel Business

Sole trader

A business owned and run by one person.

Example: A self-employed plumber is often a sole trader.

Business Studies

Sole trader

A business owned and run by one person.

Example: A self-employed plumber is often a sole trader.

Read in:Chapter 4
Computer Science

Solid-state drive

A storage device that uses flash memory rather than rotating disks.

Example: An SSD makes a laptop start quickly.

Read in:Topic 3.3
ICT

Solid-state drive

A fast storage device with no spinning platters.

Example: A laptop starts quickly when its system is stored on an SSD.

Read in:Chapter 3
Computer Science

Solid-state storage

Storage that uses electronic memory with no moving read/write parts.

Example: An SSD stores files using flash memory.

Read in:Topic 3.3
ICT

Solid-state storage

Storage that uses electronic memory chips without moving parts.

Example: An SSD stores files using flash memory.

Read in:Chapter 3
Mathematics

Solution region

The area on a graph containing all points that satisfy given inequalities.

Example: Shade the area above y = 2 to show y > 2.

Read in:Chapter 24
Mathematics

Solve an equation

Find the value that makes an equation true.

Example: For x + 4 = 9, x = 5.

Read in:Chapter 23
ICT

Source reliability

How far information can be trusted because it is accurate and well supported.

Example: A student checks who published a health claim.

Read in:Chapter 10
Edexcel Business

Sources of finance

Ways a business can obtain money to start, operate or grow.

Example: A firm uses retained profits, loans or new shares.

Read in:Chapter 25
ICT

Spam

Unwanted electronic messages, often sent to many people.

Example: An inbox receives advertisements the user did not ask for.

Read in:Chapter 10
AS & A Level Business

Span of control

The number of employees directly supervised by one manager.

Example: A supervisor responsible for eight workers has a span of eight.

Read in:Topic 7.1
Edexcel Business

Span of control

The number of employees directly supervised by one manager.

Example: A manager with six direct reports has a span of control of six.

Read in:Chapter 23
Business Studies

Span of control

The number of employees directly supervised by one manager.

Example: A manager with six direct reports has a span of control of six.

Read in:Chapter 7
AS & A Level Business

Spare capacity

Unused production ability that could produce more output.

Example: A plant can make 100 extra units each day.

Read in:Topic 4.3
AS & A Level Economics

Spare capacity

Resources or equipment that are not yet fully used.

Example: An empty production line allows a factory to increase output.

Economics

Spare capacity

Resources or equipment that are not yet fully used.

Example: An empty production line allows a factory to increase output.

Read in:Chapter 12
AS & A Level Economics

Specialisation

Focusing on a particular activity or product.

Example: A worker specialises in repairing engines.

Economics

Specialisation

Focusing on a particular activity or product.

Example: A worker specialises in repairing engines.

Edexcel Business

Specialisation

Concentrating on one type of work or product.

Example: A dentist specialises in treating teeth.

Read in:Chapter 44
Business Studies

Specialisation

Concentrating on one type of work or product.

Example: A dentist specialises in treating teeth.

Read in:Chapter 1
AS & A Level Economics

Specific tax

An indirect tax charged as a fixed amount for each unit sold.

Example: A tax of $2 on each packet increases the cost of every packet by $2.

Read in:Chapter 5
Mathematics

Speed

Distance travelled per unit of time.

Example: Travelling 120 km in 2 hours gives 60 km/h.

Read in:Chapter 12
Mathematics

Speed-time graph

A graph showing speed against time.

Example: A rising line means the speed is increasing.

Read in:Chapter 27
Edexcel Business

Sponsorship

Providing money or support in return for publicity or other benefits.

Example: A company pays to put its logo on a football shirt.

Read in:Chapter 39
Business Studies

Sponsorship

Providing money or support in return for publicity or other benefits.

Example: A company pays to put its logo on a football shirt.

Read in:Chapter 15
ICT

Spyware

Software that secretly gathers information about a user.

Example: Spyware records what websites someone visits.

Read in:Chapter 8
Mathematics

Square number

A number made by multiplying a whole number by itself.

Example: 36 is a square number because 6 × 6 = 36.

Read in:Chapter 3
Mathematics

Square root

A number which, when multiplied by itself, gives the starting number.

Example: The positive square root of 49 is 7.

Read in:Chapter 3
Mathematics

Square variation

A relationship where a quantity is proportional to the square of another.

Example: The area of a square is proportional to the square of its side length.

Read in:Chapter 26
Edexcel Business

Staff training

Teaching employees the skills and knowledge needed for work.

Example: A cashier learns how to operate the till safely.

Read in:Chapter 20
Edexcel Business

Staff welfare

Support for employees' wellbeing and working conditions.

Example: A company provides safe rest areas and counselling.

Read in:Chapter 24
AS & A Level Business

Stakeholder

A person or group affected by, or able to affect, a business.

Example: Workers and local residents are stakeholders.

Read in:Topic 1.5
Edexcel Business

Stakeholder

Anyone affected by, or able to affect, a business.

Example: Employees, customers and suppliers are stakeholders.

Read in:Chapter 6
Business Studies

Stakeholder

Anyone affected by, or able to affect, a business.

Example: Employees, customers and suppliers are stakeholders.

AS & A Level Business

Stakeholder concept

The view that businesses should consider all important affected groups.

Example: Managers balance employees' welfare with customer needs.

Read in:Topic 1.5
AS & A Level Business

Stakeholder conflict

When groups want different outcomes from a business decision.

Example: Workers want higher pay while owners want lower costs.

Read in:Topic 1.5
Business Studies

Stakeholder conflict

When different groups want different things from a business.

Example: Workers want higher wages while owners want lower costs.

Read in:Chapter 5
AS & A Level Business

Stakeholder influence

The ability of a stakeholder to affect business decisions.

Example: A large supplier may negotiate stricter payment terms.

Read in:Topic 1.5
AS & A Level Business

Stakeholder mapping

Analysing how much power and interest different stakeholders have.

Example: Managers consult high-power customers before a major change.

Read in:Topic 1.5
Edexcel Business

Stakeholders

People or groups affected by a business or able to influence it.

Example: Employees, customers, owners and local residents are stakeholders.

Mathematics

Standard form

Writing a number as a value at least 1 but less than 10 multiplied by a power of ten.

Example: 54,000 = 5.4 × 10⁴.

Read in:Chapter 8
AS & A Level Economics

Standard of deferred payment

Money's role as a common unit for future debts and repayments.

Example: A loan contract states repayment of $500 next month.

Read in:Chapter 27
AS & A Level Economics

Standard of living

The material comfort and overall quality of people's lives.

Example: Income, housing, health and education affect living standards.

Read in:Chapter 30
Economics

Standard of living

The material comfort and overall quality of people's lives.

Example: Income, housing, health and education affect living standards.

Read in:Chapter 32
Edexcel Business

Standardisation

Using consistent methods, sizes or requirements.

Example: A factory follows the same quality checks on every batch.

Read in:Chapter 42
Accounting

Standing order

An instruction to a bank to make a regular fixed payment.

Example: The bank pays $200 rent every month automatically.

Read in:Chapter 8
Edexcel Business

Star product

A Boston matrix product with high market share in a fast-growing market.

Example: A popular new app is a star in a rapidly expanding category.

Read in:Chapter 36
Business Studies

Start-up

A new business that has recently begun trading.

Example: Two friends launch a start-up selling reusable bottles.

Read in:Chapter 3
Edexcel Business

Start-up capital

Money needed to launch a new business.

Example: A new bakery needs cash for ovens and its first rent payment.

Read in:Chapter 25
AS & A Level Economics

State ownership

When the government owns and operates an enterprise.

Example: A publicly owned rail company runs passenger services.

Read in:Chapter 21
AS & A Level Economics

State provision

When government supplies goods or services directly.

Example: The state operates public schools.

Read in:Chapter 5
Economics

State provision

When government supplies goods or services directly.

Example: The state operates public schools.

Read in:Chapter 15
Accounting

Statement of account

A summary sent to a customer showing transactions and the amount still owed.

Example: A monthly statement lists invoices, payments and the balance.

Read in:Chapter 4
Accounting

Statement of affairs

A list of assets and liabilities used to estimate a business's capital when records are incomplete.

Example: Assets $5,000 − liabilities $1,500 give capital of $3,500.

Read in:Chapter 20
Accounting

Statement of changes in equity

A report explaining how a company's share capital and reserves changed over a period.

Example: It shows profit retained and dividends paid.

Read in:Chapter 17
Accounting

Statement of financial position

A report showing a business's assets, liabilities and capital on a particular date.

Example: The statement shows what the shop owns and owes on 31 December.

AS & A Level Business

Statement of financial position

A report showing assets, liabilities and equity at a particular date.

Example: A company lists what it owns and owes on 31 December.

Read in:Topic 10.1
Edexcel Business

Statement of financial position

A statement showing a business's assets, liabilities and equity at a specific date.

Example: A business lists what it owns and owes on 31 December.

Business Studies

Statement of financial position

A statement showing a business's assets, liabilities and equity at a specific date.

Example: A business lists what it owns and owes on 31 December.

Read in:Chapter 25
AS & A Level Business

Statement of profit or loss

A report showing revenue, expenses and profit over a period.

Example: A retailer reports sales and expenses for the year.

Read in:Topic 10.1
Edexcel Business

Stock exchange

A market where shares in listed companies can be bought and sold.

Example: Investors trade public-company shares on a stock exchange.

Read in:Chapter 4
ICT

Storage capacity

The amount of data a storage device can hold.

Example: A 1 TB drive holds more data than a 256 GB drive.

Read in:Chapter 3
AS & A Level Economics

Store of value

Something that can keep purchasing power for future use.

Example: People save money to spend next month.

Read in:Chapter 27
Economics

Store of value

Something that can keep purchasing power for future use.

Example: People save money to spend next month.

Read in:Chapter 16
Accounting

Straight-line method

A depreciation method charging the same amount each year.

Example: A $6,000 asset with no residual value over three years costs $2,000 per year.

Read in:Chapter 11
AS & A Level Business

Strategic alliance

Businesses agreeing to cooperate while remaining separate organisations.

Example: Two airlines share routes through a partnership.

Read in:Topic 1.3
AS & A Level Business

Strategic analysis

Studying the business and its environment before making long-term decisions.

Example: Managers review competitors and customer trends.

Read in:Topic 6.2
AS & A Level Business

Strategic implementation

Putting a chosen long-term strategy into action.

Example: A company recruits a team to launch its overseas expansion.

Read in:Topic 6.2
Edexcel Business

Strategic industry

An industry considered especially important to a country's economy or security.

Example: A government may retain control of national electricity networks.

Read in:Chapter 5
AS & A Level Business

Strategic objective

An important long-term goal that guides business decisions.

Example: Expand into three foreign markets within five years.

Read in:Topic 1.4
AS & A Level Business

Strategic risk

A threat that could prevent a business achieving its long-term goals.

Example: Heavy borrowing could limit future expansion.

Read in:Topic 10.4
AS & A Level Business

Stratified sample

A sample split into relevant groups, with members chosen from each.

Example: A firm samples teenagers and adults in proportion to their numbers.

Read in:Topic 3.2
Economics

Strike

When workers collectively stop working to support a demand.

Example: Bus drivers stop work during a pay dispute.

Read in:Chapter 19
Computer Science

String

A sequence of characters treated as text.

Example: "Hello" is a string.

Read in:Topic 8.1
Edexcel Business

Strong currency

A currency that has a relatively high value compared with another.

Example: A stronger pound makes imported products cheaper in pounds.

Read in:Chapter 11
AS & A Level Economics

Structural transformation

A shift in employment and production between economic sectors as an economy develops.

Example: Workers move from farming into manufacturing and services.

Read in:Chapter 30
AS & A Level Business

Structural unemployment

Joblessness caused by a mismatch between workers' skills or locations and available jobs.

Example: Automation removes roles that require old skills.

Read in:Topic 6.1
AS & A Level Economics

Structural unemployment

Unemployment caused by a mismatch between workers' skills or locations and available jobs.

Example: A mine closes and workers need different skills.

Economics

Structural unemployment

Unemployment caused by a mismatch between workers' skills or locations and available jobs.

Example: A mine closes and workers need different skills.

Read in:Chapter 30
Computer Science

Structure diagram

A diagram showing how a system is divided into modules.

Example: A tree diagram shows the parts of a payroll program.

Read in:Topic 7.2
Computer Science

Structured Query Language

A language used to create, retrieve and change data in relational databases.

Example: SELECT Name FROM Students lists names.

Read in:Topic 9.1
AS & A Level Business

Subcontracting

Giving part of a contract or task to another organisation.

Example: A builder hires an electrician for one project.

Read in:Topic 4.3
Computer Science

Subroutine

A named group of instructions that can be run from elsewhere in a program.

Example: A printReceipt subroutine displays a receipt.

Read in:Topic 7.9
Accounting

Subscriptions

Membership fees paid to join or belong to a club.

Example: Members each pay $50 a year.

Read in:Chapter 18
Accounting

Subscriptions in advance

Fees received now for membership relating to a future period.

Example: A member pays next year's fee early.

Read in:Chapter 18
Accounting

Subscriptions in arrears

Membership fees owed by members for a period that has already passed.

Example: A member still owes $20 for the current year.

Read in:Chapter 18
Mathematics

Subset

A set whose every element also belongs to another set.

Example: {2, 4} is a subset of {2, 4, 6}.

Read in:Chapter 2
AS & A Level Economics

Subsidy

Money provided by a government to reduce costs or encourage an activity.

Example: A subsidy helps farmers produce food more cheaply.

Economics

Subsidy

Money provided by a government to reduce costs or encourage an activity.

Example: A subsidy helps farmers produce food more cheaply.

Read in:Chapter 8
Business Studies

Subsidy

Money given by government to reduce a business's costs or encourage activity.

Example: A government helps farmers pay production costs.

Economics

Substitute goods

Products that can be used instead of one another.

Example: Tea can be a substitute for coffee.

Read in:Chapter 7
Mathematics

Substitution

Replacing a variable with a given value.

Example: If x = 4, then 3x = 12.

Read in:Chapter 19
AS & A Level Economics

Substitution effect

When a price change makes one product more or less attractive compared with alternatives.

Example: If tea becomes cheaper than coffee, some customers switch to tea.

Computer Science

Subsystem

A smaller part of a larger system that handles one task.

Example: A school system has attendance and timetabling subsystems.

Read in:Topic 7.2
Mathematics

Subtraction

Finding how much remains or the difference between two amounts.

Example: 9 − 4 = 5.

Read in:Chapter 6
AS & A Level Economics

Supernormal profit

Profit above the minimum needed to keep resources in their present use.

Example: A patented medicine may earn supernormal profit while competition is limited.

Edexcel Business

Supervisors

Employees who oversee the daily work of other staff.

Example: A shift supervisor checks team performance.

Read in:Chapter 23
AS & A Level Business

Supply

The amount producers are willing and able to sell at different prices.

Example: Firms offer more units when prices rise, other things equal.

Read in:Topic 3.1
AS & A Level Economics

Supply

The quantity producers are willing and able to sell at different prices.

Example: Farmers may supply more tomatoes when prices rise.

Economics

Supply

The quantity producers are willing and able to sell at different prices.

Example: Farmers may supply more tomatoes when prices rise.

AS & A Level Business

Supply chain

The network of businesses and activities involved in making and delivering a product.

Example: A farmer, processor, distributor and shop form a supply chain.

Read in:Topic 4.2
Edexcel Business

Supply chain

The linked businesses and steps involved in making and delivering a product.

Example: Cotton farms, textile factories and shops form a clothing supply chain.

AS & A Level Economics

Supply curve

A graph showing the relationship between price and quantity supplied.

Example: An ordinary supply curve slopes upward.

Economics

Supply curve

A graph showing the relationship between price and quantity supplied.

Example: An ordinary supply curve slopes upward.

Read in:Chapter 8
Economics

Supply decrease

When firms can and want to sell less at each price.

Example: A flood reduces the supply of vegetables.

Read in:Chapter 10
Economics

Supply increase

When firms can and want to sell more at each price.

Example: Good weather increases the supply of crops.

Read in:Chapter 10
AS & A Level Economics

Supply of labour

The number of people willing and able to work at different wage rates.

Example: Higher wages attract more applicants for a job.

Economics

Supply of labour

The number of people willing and able to work at different wage rates.

Example: Higher wages attract more applicants for a job.

Read in:Chapter 18
AS & A Level Business

Supply-chain integration

Coordinating suppliers, production and distribution so they work together efficiently.

Example: Sales data automatically informs suppliers when to deliver.

Read in:Topic 9.3
AS & A Level Business

Supply-side policy

Actions intended to improve an economy's capacity and productive efficiency.

Example: Government funds technical training for workers.

Read in:Topic 6.1
AS & A Level Economics

Supply-side policy

An action aimed at increasing the economy's ability to produce goods and services.

Example: Training workers helps firms produce more.

Economics

Supply-side policy

An action aimed at increasing the economy's ability to produce goods and services.

Example: Training workers helps firms produce more.

Read in:Chapter 28
AS & A Level Economics

Supply-side reform

A measure intended to improve incentives, efficiency or productive capacity.

Example: Skills training can raise worker productivity over time.

Mathematics

Surd

A root left in exact form because it cannot be simplified to a rational number.

Example: √2 is a surd.

Read in:Chapter 18
Mathematics

Surface area

The total area of all outer faces or surfaces of a 3D solid.

Example: A cube of side 2 cm has surface area 24 cm².

Read in:Chapter 40
Accounting

Surplus

When a non-profit organisation's income is greater than its expenses.

Example: A club earns $1,200 and spends $1,000, giving a $200 surplus.

Read in:Chapter 18
Edexcel Business

Survival

A business objective of staying open and avoiding closure.

Example: A new café focuses on covering its bills during its first year.

Business Studies

Survival

A business objective of staying open and avoiding closure.

Example: A new café focuses on covering its bills during its first year.

Read in:Chapter 5
AS & A Level Business

Survival objective

A focus on keeping the business operating through difficulty.

Example: A shop reduces costs to avoid closure.

Read in:Topic 1.4
Accounting

Suspense account

A temporary account used to hold the difference when the trial balance does not agree.

Example: A $90 difference is placed in suspense until the mistake is found.

Read in:Chapter 7
AS & A Level Business

Sustainability

Using resources in ways that meet present needs without harming future generations.

Example: A manufacturer reduces water use and reuses materials.

Read in:Topic 4.1
Edexcel Business

Sustainability

Using resources in ways that meet present needs without harming future generations.

Example: A manufacturer reduces water use and reuses materials.

Read in:Chapter 13
Edexcel Business

Sustainable development

Meeting today's needs while protecting resources for future generations.

Example: A company uses renewable energy and reduces waste.

Read in:Chapter 13
Business Studies

Sustainable development

Meeting today's needs while protecting resources for future generations.

Example: A company uses renewable energy and reduces waste.

Read in:Chapter 28
AS & A Level Economics

Sustainable economic growth

Economic growth that can continue without seriously harming future wellbeing or resources.

Example: A country expands renewable power while protecting natural resources.

Computer Science

Switch

A device that forwards data to the correct device within a local network.

Example: A classroom switch connects desktop computers.

Read in:Topic 3.4
ICT

Switch

A network device that forwards data to the correct connected device when possible.

Example: A switch sends a message only to the intended port.

Read in:Chapter 4
AS & A Level Business

SWOT analysis

Reviewing strengths, weaknesses, opportunities and threats.

Example: A firm lists strong branding as a strength and rising rivals as a threat.

Read in:Topic 6.2
Computer Science

Symmetric encryption

Encryption where the same secret key is used to encrypt and decrypt.

Example: Two devices share one secret key for a secure connection.

Read in:Topic 2.3
Computer Science

Syntax error

An error caused by breaking a programming language's grammar rules.

Example: A missing closing bracket can cause a syntax error.

Computer Science

System software

Software that helps the computer hardware and other software work.

Example: An operating system is system software.

Read in:Topic 4.1
ICT

System software

Software that helps the computer run and manages its hardware.

Example: An operating system manages memory and devices.

Read in:Chapter 1
ICT

System specification

A clear description of what a proposed system needs to do and use.

Example: The specification lists required hardware and software.

Read in:Chapter 7
ICT

Systems analysis

Studying the existing system and identifying what the new one must do.

Example: An analyst asks staff how they record orders.

Read in:Chapter 7
ICT

Systems analyst

A person who investigates a system and recommends improvements.

Example: An analyst interviews teachers before designing new software.

Read in:Chapter 7
ICT

Systems life cycle

The stages used to plan, develop, introduce and review an information system.

Example: A school follows stages when replacing its attendance system.

Read in:Chapter 7

T Dictionary terms

Accounting

T-account

A simple account drawn like the letter T with debit and credit sides.

Example: A cash T-account shows money received on the left.

Read in:Chapter 3
Computer Science

Table

A set of related records arranged into rows and columns.

Example: A student table stores names and grades.

Read in:Topic 9.1
AS & A Level Business

Tactical objective

A shorter-term target that helps deliver a strategy.

Example: Recruit ten sales staff before the product launch.

Read in:Topic 1.4
AS & A Level Business

Takeover

When one business gains control of another.

Example: A large retailer acquires a smaller chain.

Read in:Topic 1.3
Business Studies

Takeover

When one business gains control of another business.

Example: A larger shop chain buys a smaller competitor.

Read in:Chapter 3
Edexcel Business

Tall structure

An organisation with many management levels.

Example: A large bureaucracy may have several levels between workers and the director.

Read in:Chapter 23
Business Studies

Tall structure

An organisation with many management levels.

Example: A large bureaucracy may have several levels between workers and the director.

Read in:Chapter 7
Mathematics

Tangent

A straight line touching a curve at a chosen point with the same gradient there.

Example: Draw a tangent to estimate the curve's gradient at x = 2.

Mathematics

Tangent ratio

A trigonometric ratio: opposite side divided by adjacent side.

Example: If opposite = 3 and adjacent = 4, tan = 3/4.

Read in:Chapter 41
ICT

Target audience

The particular group of people a product or message is meant for.

Example: A revision site is aimed at students preparing for exams.

Read in:Chapter 9
Business Studies

Target audience

The people a marketing message aims to reach.

Example: A toy advert may target parents of young children.

Read in:Chapter 15
AS & A Level Business

Target market

The group of customers a business intends to serve.

Example: A children's clothing shop targets parents of young children.

Read in:Topic 8.2
Edexcel Business

Target market

The group of customers a business intends to serve.

Example: A children's clothing shop targets parents of young children.

Edexcel Business

Targeted advertising

Promotion aimed at people likely to be interested in a product.

Example: A sports brand shows running-shoe adverts to runners.

Read in:Chapter 39
AS & A Level Business

Tariff

A tax placed on imported goods.

Example: A 10% tariff makes imported shoes more expensive.

Read in:Topic 6.1
AS & A Level Economics

Tariff

A tax charged on imported goods.

Example: An import tariff raises the price of foreign cars.

Economics

Tariff

A tax charged on imported goods.

Example: An import tariff raises the price of foreign cars.

Read in:Chapter 37
Edexcel Business

Tariff

A tax on imported products.

Example: A $5 tariff makes an imported shirt more expensive.

Business Studies

Tariff

A tax on imported products.

Example: A $5 tariff makes an imported shirt more expensive.

Edexcel Business

Tax authorities

Government bodies responsible for collecting and enforcing taxes.

Example: A business files returns with the tax authority.

Read in:Chapter 32
AS & A Level Economics

Tax incidence

How the burden of a tax is shared between buyers and sellers.

Example: If demand is inelastic, consumers may bear most of a cigarette tax.

Read in:Chapter 5
AS & A Level Economics

Tax revenue

Money collected by government from taxes.

Example: A $3 tax on 1,000 units raises $3,000 before collection costs.

Edexcel Business

Tax revenue

Money collected by government from taxes.

Example: A $3 tax on 1,000 units raises $3,000 before collection costs.

Read in:Chapter 10
Edexcel Business

Taxation

The taxes collected by government from people and businesses.

Example: Businesses may pay tax on profits or sales.

Read in:Chapter 12
Business Studies

Taylor's theory

The idea that money is a major motivator for employees.

Example: A factory offers pay for every item completed.

Read in:Chapter 6
AS & A Level Business

Team pay

Rewarding employees partly for the performance of their group.

Example: A production team shares a bonus for meeting quality targets.

Read in:Topic 7.4
Edexcel Business

Teamworking

Employees working together to complete shared tasks.

Example: A sales team develops a campaign together.

Business Studies

Teamworking

Employees working together to complete shared tasks.

Example: A sales team develops a campaign together.

Read in:Chapter 6
ICT

Technical documentation

Instructions for people who maintain or develop a system.

Example: A programmer reads the system's database design.

Read in:Chapter 7
Edexcel Business

Technical economies

Lower average costs gained by using efficient machinery or production methods at scale.

Example: A large factory spreads the cost of specialised machines over more output.

Read in:Chapter 40
AS & A Level Economics

Technical efficiency

Producing a given output using the fewest inputs physically possible.

Example: A factory reduces wasted materials while making the same number of chairs.

Read in:Chapter 15
AS & A Level Economics

Technological unemployment

Job losses caused when new machines or software replace particular tasks.

Example: Automated checkout systems reduce demand for some cashier jobs.

AS & A Level Economics

Technology

The knowledge and equipment used to make production more effective.

Example: A new machine lets a factory produce more per hour.

Economics

Technology

The knowledge and equipment used to make production more effective.

Example: A new machine lets a factory produce more per hour.

Read in:Chapter 8
Edexcel Business

Technology

The knowledge and equipment used to make production more effective.

Example: A new machine lets a factory produce more per hour.

Edexcel Business

Technology transfer

Passing technical knowledge, skills or equipment from one organisation or country to another.

Example: A multinational trains local workers to use new machinery.

Read in:Chapter 10
Edexcel Business

Temporary contract

A job agreement that lasts for a set period or until a particular task finishes.

Example: A retailer hires seasonal staff for December.

Read in:Chapter 18
Computer Science

Terabyte

A unit of data storage equal to one trillion bytes in decimal notation.

Example: An external hard drive may store 2 TB.

Read in:Topic 1.3
Mathematics

Term

A single part of an expression separated by addition or subtraction.

Example: 3x and 4 are terms in 3x + 4.

Read in:Chapter 19
Mathematics

Term-to-term rule

A rule for finding a sequence term from the previous term.

Example: Add 4 each time: 2, 6, 10, 14.

Read in:Chapter 25
AS & A Level Economics

Terms of trade

The price of a country's exports compared with the price of its imports.

Example: If export prices rise faster than import prices, the terms of trade improve.

Economics

Terms of trade

The price of a country's exports compared with the price of its imports.

Example: If export prices rise faster than import prices, the terms of trade improve.

Read in:Chapter 36
AS & A Level Business

Tertiary sector

Businesses that provide services.

Example: A hairdresser provides a tertiary-sector service.

Read in:Topic 1.2
Economics

Tertiary sector

Businesses providing services.

Example: Restaurants and banks are in the tertiary sector.

Edexcel Business

Tertiary sector

Businesses that provide services to customers and other businesses.

Example: Banks and hotels are in the tertiary sector.

Read in:Chapter 7
Business Studies

Tertiary sector

Businesses that provide services to customers and other businesses.

Example: Banks and hotels are in the tertiary sector.

Read in:Chapter 2
Computer Science

Test case

One set of test inputs with an expected result.

Example: A login test checks what happens with the wrong password.

Read in:Topic 7.8
Computer Science

Test data

Values used to check whether a program handles inputs correctly.

Example: A student enters normal, boundary and invalid values.

AS & A Level Business

Test marketing

Selling a new product in a limited area before a full launch.

Example: A drink is trialled in one city first.

Read in:Topic 3.2
Edexcel Business

Test marketing

Selling a new product in a limited area before a full launch.

Example: A drink is trialled in one city first.

Computer Science

Test plan

A table of test inputs, expected outcomes and actual outcomes.

Example: A test plan lists valid and invalid passwords.

Read in:Topic 7.6
ICT

Test plan

A list of tests, input data and expected results for a system.

Example: A tester records how the system should handle an invalid date.

Read in:Chapter 7
Computer Science

Testing

Checking a program with data to see whether it behaves as expected.

Example: A student tests a calculator with several inputs.

Computer Science

Text file

A file that stores readable characters.

Example: A list of usernames can be stored in a text file.

Read in:Topic 8.3
AS & A Level Business

Theory X

McGregor's view that workers generally dislike work and need close supervision.

Example: A Theory X manager closely monitors every task.

Read in:Topic 2.3
AS & A Level Business

Theory Y

McGregor's view that workers can be self-directed and seek responsibility.

Example: A Theory Y manager allows employees to plan their work.

Read in:Topic 2.3
Mathematics

Three-figure bearing

A bearing written using three digits from 000° to 359°.

Example: South-west has bearing 225°.

Read in:Chapter 34
Computer Science

Threshold

A value at which a system should take action.

Example: A cooling fan starts when the temperature exceeds 30°C.

Read in:Topic 6.1
AS & A Level Economics

Time inconsistency

When a policymaker has an incentive to break an earlier promise after people have acted.

Example: A central bank promises low inflation but later creates surprise inflation.

Read in:Chapter 28
Mathematics

Time interval

The amount of time between two events.

Example: From 09:15 to 10:00 is a 45-minute interval.

Read in:Chapter 12
AS & A Level Economics

Time period

How much time producers have to respond to changing conditions.

Example: A farmer needs months to grow a new crop.

Read in:Chapter 3
Economics

Time period

How much time producers have to respond to changing conditions.

Example: A farmer needs months to grow a new crop.

Read in:Chapter 12
Edexcel Business

Time rate

Pay based on how many hours or days an employee works.

Example: A worker earns £12 per hour.

Read in:Chapter 22
AS & A Level Business

Time value of money

The idea that money available now is normally worth more than the same amount later.

Example: $100 today can earn interest before next year.

Read in:Topic 10.3
Mathematics

Time zone

An area that uses the same standard clock time.

Example: A call may be at 9 a.m. in one country and noon in another.

Read in:Chapter 15
Mathematics

Timetable

A table showing when events or journeys are scheduled.

Example: A bus timetable lists departure times.

Read in:Chapter 15
Computer Science

Top-down design

Planning a problem by splitting it into smaller subproblems.

Example: A booking system is divided into login, search and payment.

Read in:Topic 7.2
AS & A Level Business

Total cost

The sum of fixed and variable costs.

Example: Fixed costs of $1,000 plus variable costs of $1,500 give total costs of $2,500.

Read in:Topic 5.4
AS & A Level Economics

Total cost

All fixed and variable costs added together.

Example: Fixed costs of $300 plus variable costs of $200 give total costs of $500.

Economics

Total cost

All fixed and variable costs added together.

Example: Fixed costs of $300 plus variable costs of $200 give total costs of $500.

Read in:Chapter 22
Edexcel Business

Total cost

All fixed and variable costs added together.

Example: $500 fixed costs plus $300 variable costs gives $800 total cost.

Read in:Chapter 27
Business Studies

Total cost

All fixed and variable costs added together.

Example: $500 fixed costs plus $300 variable costs gives $800 total cost.

Read in:Chapter 19
AS & A Level Economics

Total factor productivity

Growth in output not explained only by using more labour and capital.

Example: Better management produces more with the same workers and machines.

Read in:Chapter 8
AS & A Level Business

Total quality management

A business-wide approach in which everyone continuously works to improve quality.

Example: Employees suggest ways to prevent recurring faults.

Read in:Topic 9.2
Edexcel Business

Total quality management

A business-wide approach where everyone works to improve quality continuously.

Example: All employees suggest ways to reduce customer complaints.

Read in:Chapter 45
Business Studies

Total quality management

A business-wide approach where everyone works to improve quality continuously.

Example: All employees suggest ways to reduce customer complaints.

Read in:Chapter 20
AS & A Level Business

Total revenue

The money earned from selling goods or services before costs.

Example: Selling 200 units for $15 each gives revenue of $3,000.

Read in:Topic 8.1
AS & A Level Economics

Total revenue

The money a firm receives from sales before costs are deducted.

Example: Selling 20 items at $5 each creates $100 of revenue.

Economics

Total revenue

The money a firm receives from sales before costs are deducted.

Example: Selling 20 items at $5 each creates $100 of revenue.

Edexcel Business

Total revenue

The money earned from selling goods or services before costs.

Example: Selling 200 units for $15 each gives revenue of $3,000.

AS & A Level Economics

Total revenue test

Using how total sales revenue responds to price changes to judge demand elasticity.

Example: If a price cut raises total revenue, demand is price elastic.

Read in:Chapter 3
AS & A Level Economics

Total utility

The overall satisfaction gained from consuming a quantity of a good.

Example: Eating three apples provides the combined satisfaction from all three.

Read in:Chapter 14
Computer Science

Totalling

Adding values together to calculate a total.

Example: A loop adds all students' marks.

Read in:Topic 7.4
ICT

Touch screen

A display that also detects touches as input.

Example: A self-service kiosk lets customers select options by tapping.

Read in:Chapter 2
ICT

Touchpad

A touch-sensitive surface used to move a pointer.

Example: A laptop user slides a finger on a touchpad.

Read in:Chapter 2
Computer Science

Touchscreen

A display that also detects touches as input.

Example: A visitor chooses options on a touchscreen kiosk.

Read in:Topic 3.2
Computer Science

Trace table

A table that records how variable values change as an algorithm runs.

Example: A trace table shows the total after each loop.

ICT

Trackerball

A pointing device with a ball that is rotated to move the cursor.

Example: A user rolls the ball without moving the whole device.

Read in:Chapter 2
AS & A Level Economics

Tradable pollution permit

A right to emit a specified amount of pollution that businesses can trade.

Example: A low-emission firm sells unused permits to another producer.

Read in:Chapter 21
AS & A Level Economics

Trade

Buying and selling goods and services between people, firms or countries.

Example: A country buys wheat from abroad.

Economics

Trade

Buying and selling goods and services between people, firms or countries.

Example: A country buys wheat from abroad.

Read in:Chapter 36
AS & A Level Business

Trade agreement

An agreement between countries setting rules or lowering barriers to trade.

Example: Two countries agree to reduce tariffs on goods.

Read in:Topic 6.1
AS & A Level Economics

Trade balance

The value of exported goods minus the value of imported goods.

Example: Exports of $90m and imports of $100m give a goods trade deficit of $10m.

Economics

Trade balance

The value of exported goods minus the value of imported goods.

Example: Exports of $90m and imports of $100m give a goods trade deficit of $10m.

Read in:Chapter 39
Edexcel Business

Trade balance

The value of exported goods minus the value of imported goods.

Example: Exports of $90m and imports of $100m give a goods trade deficit of $10m.

Read in:Chapter 11
Business Studies

Trade barrier

A rule or cost that makes importing or exporting harder.

Example: An import tax makes foreign products more expensive.

Edexcel Business

Trade barriers

Restrictions that make buying and selling across national borders more difficult.

Example: A tariff raises the cost of imported goods.

Edexcel Business

Trade blocs

Groups of countries that agree to make trade between members easier.

Example: Members may reduce tariffs on goods traded within the bloc.

Read in:Chapter 8
AS & A Level Economics

Trade creation

When integration causes a country to import from a lower-cost member instead of making goods domestically.

Example: A customs union allows cheaper goods to replace expensive local production.

AS & A Level Business

Trade credit

Buying goods now and paying suppliers at a later agreed date.

Example: A supplier gives a shop 30 days to pay.

Read in:Topic 5.1
Edexcel Business

Trade credit

When suppliers let a business buy now and pay later.

Example: A retailer pays its supplier 30 days after delivery.

Business Studies

Trade credit

When suppliers let a business buy now and pay later.

Example: A retailer pays its supplier 30 days after delivery.

Accounting

Trade discount

A reduction in the listed price given by a seller, often to trade customers.

Example: A $200 item with 10% trade discount is invoiced at $180.

AS & A Level Economics

Trade diversion

When integration shifts imports from a lower-cost outsider to a higher-cost member.

Example: Tariff rules make a member's goods cheaper than a more efficient outsider's.

AS & A Level Economics

Trade liberalisation

Reducing tariffs, quotas and other restrictions on international trade.

Example: A country lowers import tariffs to encourage competition.

AS & A Level Business

Trade payable

Money a business owes suppliers for goods bought on credit.

Example: A bakery still owes its flour supplier $800.

Read in:Topic 5.1
Accounting

Trade payables

Suppliers the business owes money to for credit purchases.

Example: The shop owes a wholesaler $500.

Read in:Chapter 9
AS & A Level Business

Trade payables days

The average time a business takes to pay its suppliers.

Example: A company normally pays trade suppliers after 35 days.

Read in:Topic 10.2
Accounting

Trade payables payment period

Average time the business takes to pay suppliers for credit purchases.

Example: $2,000 payables on $24,000 annual credit purchases gives about 30 days.

Edexcel Business

Trade policy

Government decisions about imports, exports and international trade rules.

Example: A government lowers tariffs to encourage trade.

Read in:Chapter 12
AS & A Level Economics

Trade protection

Government measures that restrict competition from imported products.

Example: A tariff makes imported shoes more expensive.

Read in:Chapter 12
AS & A Level Business

Trade receivable

Money customers owe a business for goods bought on credit.

Example: A retailer has sold $3,000 of goods to a customer who has not yet paid.

Read in:Topic 5.1
Accounting

Trade receivables

Customers who owe the business money for credit sales.

Example: A customer has not yet paid a $300 invoice.

Read in:Chapter 9
Accounting

Trade receivables collection period

Average time customers take to pay for credit sales.

Example: $1,000 receivables and $12,000 annual credit sales give about 30 days.

AS & A Level Business

Trade receivables days

The average time customers take to pay what they owe.

Example: A company collects credit sales after about 40 days.

Read in:Topic 10.2
Accounting

Trade supplier

A business that provides goods or services to another business.

Example: A wholesaler supplies goods to a retailer.

Read in:Chapter 24
AS & A Level Economics

Trade union

An organisation that represents workers and protects their interests.

Example: A teachers' union bargains over pay and working hours.

Read in:Chapter 23
Economics

Trade union

An organisation that represents workers and protects their interests.

Example: A teachers' union bargains over pay and working hours.

Read in:Chapter 19
Business Studies

Trade union

An organisation representing employees' interests at work.

Example: A union negotiates pay and safety conditions.

Read in:Chapter 7
AS & A Level Economics

Trade-off

Giving up some of one benefit to gain another.

Example: Studying longer may mean less free time.

Read in:Chapter 22
Economics

Trade-off

Giving up some of one benefit to gain another.

Example: Studying longer may mean less free time.

AS & A Level Economics

Trade-weighted exchange rate

An average of a currency's value against currencies of important trading partners.

Example: A country weights the euro and dollar by their shares in its trade.

Read in:Chapter 29
Accounting

Trading account

The part of the income statement used to calculate gross profit.

Example: It deducts cost of sales from net sales.

Read in:Chapter 15
Accounting

Trading business

A business that buys goods and resells them to customers.

Example: A supermarket is a trading business.

Read in:Chapter 15
ICT

Traffic management

Using technology to monitor and improve the movement of vehicles.

Example: Sensors adjust traffic-light timings during rush hour.

Read in:Chapter 5
AS & A Level Economics

Training

Teaching people skills needed for work.

Example: A course helps workers operate new machines.

Economics

Training

Teaching people skills needed for work.

Example: A course helps workers operate new machines.

Read in:Chapter 28
Edexcel Business

Training

Teaching people skills needed for work.

Example: A course helps workers operate new machines.

Edexcel Business

Training costs

The expenses of developing employee skills and knowledge.

Example: A firm pays course fees and covers workers' time away from work.

Read in:Chapter 20
Computer Science

Training data

Examples used to help a machine-learning system learn.

Example: A model learns to recognise cats from labelled photographs.

Read in:Topic 6.3
AS & A Level Business

Trait theory

The idea that certain personal qualities help people become effective leaders.

Example: Confidence and determination may help someone lead.

Read in:Topic 7.3
Computer Science

Transaction

An action recorded in a payment or data system.

Example: Sending digital currency to someone is a transaction.

Read in:Topic 5.2
AS & A Level Economics

Transfer earnings

The minimum payment needed to keep a worker or resource in its present occupation.

Example: A teacher could earn $30,000 elsewhere and needs at least that to stay.

Read in:Chapter 23
AS & A Level Economics

Transfer payment

A government payment to a person without receiving a good or service in return.

Example: Unemployment benefits are transfer payments.

Mathematics

Transformation

A change in a shape's position, direction or size following a mathematical rule.

Example: A reflection is a transformation.

Read in:Chapter 42
AS & A Level Business

Transformation process

Changing inputs such as materials and labour into useful outputs.

Example: A furniture maker turns timber into tables.

Read in:Topic 1.1
AS & A Level Business

Transformational leadership

Leadership that inspires people to support a shared vision and significant change.

Example: A leader encourages staff to adopt a new business model.

Mathematics

Translation

Moving every point the same distance in the same direction without turning it.

Example: Moving right 3 and up 2 is a translation.

Read in:Chapter 42
Computer Science

Translator

Software that converts source code into another form that can be executed.

Example: A compiler translates a source program.

Read in:Topic 4.2
Computer Science

Transmission error

A change to data while it is being sent.

Example: Electrical interference may flip a transmitted bit.

Read in:Topic 2.2
AS & A Level Business

Transport costs

The expense of moving materials, workers or products.

Example: A distant warehouse increases delivery expenses.

Read in:Topic 9.1
Edexcel Business

Transport costs

The expense of moving materials, workers or products.

Example: A distant warehouse increases delivery expenses.

Read in:Chapter 8
Mathematics

Transversal

A line that crosses two or more other lines.

Example: A diagonal line crossing two horizontal lines is a transversal.

Read in:Chapter 37
Mathematics

Travel graph

A graph that shows how a journey changes over time.

Example: A flat line on a distance-from-home graph shows a stop.

Read in:Chapter 27
Accounting

Treasurer

The person responsible for handling a club's money and accounting records.

Example: The treasurer records membership subscriptions.

Read in:Chapter 18
Mathematics

Tree diagram

A branching drawing showing possible outcomes of successive events.

Example: A two-toss coin tree has four outcome paths.

Read in:Chapter 44
Accounting

Trend analysis

Comparing figures over time to spot patterns and changes.

Example: A three-year drop in gross margin is a trend.

Read in:Chapter 22
AS & A Level Business

Trend analysis

Studying changes in figures over several periods.

Example: A manager compares revenue growth across five years.

Read in:Topic 10.2
Accounting

Trial balance

A list of ledger balances used to check whether total debits equal total credits.

Example: A trial balance shows $10,000 on each side.

Read in:Chapter 6
AS & A Level Business

Triple bottom line

Judging performance using people, planet and profit.

Example: A company tracks wages, emissions and financial results.

Read in:Topic 1.4
Computer Science

Trojan horse

Malicious software disguised as a useful program.

Example: A fake game installer secretly installs malware.

Read in:Topic 5.3
ICT

Trojan horse

A harmful program that pretends to be safe or useful.

Example: A fake game installer secretly steals data.

Read in:Chapter 8
Computer Science

Truth table

A table showing all possible input combinations and the resulting output.

Example: A two-input gate has four rows in its truth table.

Mathematics

Turning point

A point where a curve changes from increasing to decreasing or vice versa.

Example: The minimum of y = x² is its turning point at (0,0).

Read in:Chapter 29
AS & A Level Business

Turnover

The total sales revenue a business earns in a period before expenses.

Example: Selling 500 items at $20 gives turnover of $10,000.

Read in:Topic 1.3
Computer Science

Two's complement

A way of representing positive and negative whole numbers in binary.

Example: In 8-bit two's complement, 11111111 means −1.

Read in:Topic 1.1
Computer Science

Two-dimensional array

An array arranged in rows and columns.

Example: seats stores a classroom seating plan.

Read in:Topic 8.2
Computer Science

Two-factor authentication

Logging in using two different kinds of proof of identity.

Example: A user enters a password and confirms using an app.

Read in:Topic 5.3
ICT

Two-factor authentication

A login method that requires two different types of proof of identity.

Example: A student enters a password and a code from an app.

Read in:Chapter 8
AS & A Level Business

Two-way communication

Information exchanged with an opportunity for feedback.

Example: A team meeting includes questions and discussion.

Read in:Topic 7.2
Business Studies

Two-way communication

A message exchange where people can respond and ask questions.

Example: A manager discusses a plan with workers.

Read in:Chapter 9
Computer Science

Type check

Checking that a value has the required data type.

Example: A quantity field must contain a number.

Read in:Topic 7.5
ICT

Type check

A validation rule checking that entered data has the right type.

Example: A quantity field only accepts numbers.

Read in:Chapter 7

U Dictionary terms

Accounting

Uncredited deposit

Money recorded in the cash book but not yet shown on the bank statement.

Example: Cash paid in late on Friday appears on Monday's statement.

Read in:Chapter 8
Accounting

Undercast

When a total is added up lower than its correct amount.

Example: A list totalling $600 is incorrectly added as $560.

Read in:Chapter 7
AS & A Level Economics

Underemployment

Having a job but working fewer hours than wanted or using fewer skills than available.

Example: A qualified engineer working just two hours a week is underemployed.

Accounting

Understandability

How clearly accounting information is presented to people who use it.

Example: An easy-to-read table helps owners interpret results.

Read in:Chapter 27
AS & A Level Business

Underutilisation

Operating well below available capacity.

Example: A hotel fills only 30% of its rooms.

Read in:Topic 4.3
Accounting

Undervalued inventory

Inventory shown at a value lower than it should be.

Example: Recording $400 instead of $500 closing stock understates profit by $100.

Read in:Chapter 14
AS & A Level Economics

Unemployment

When people who are available and actively seeking work cannot find a job.

Example: A worker applies for jobs but remains unemployed.

Economics

Unemployment

When people who are available and actively seeking work cannot find a job.

Example: A worker applies for jobs but remains unemployed.

Edexcel Business

Unemployment

When people who want and are able to work cannot find a job.

Example: A worker applies for jobs but cannot find work.

Read in:Chapter 12
Business Studies

Unemployment

When people who want and are able to work cannot find a job.

Example: A worker applies for jobs but cannot find work.

Read in:Chapter 27
Economics

Unemployment of resources

When some available workers or other resources are not being used.

Example: An economy operates inside its PPC because factories are idle.

Read in:Chapter 4
AS & A Level Economics

Unemployment rate

The percentage of the labour force that is unemployed.

Example: If 5 of 100 people in the labour force are jobless, unemployment is 5%.

Economics

Unemployment rate

The percentage of the labour force that is unemployed.

Example: If 5 of 100 people in the labour force are jobless, unemployment is 5%.

Read in:Chapter 30
Edexcel Business

Unfair dismissal

Ending someone's employment without a legally fair reason or procedure.

Example: A worker is dismissed without required consultation or justification.

Read in:Chapter 19
Computer Science

Unicode

A character-encoding standard that supports characters from many languages.

Example: Unicode can represent English letters and Arabic characters.

Read in:Topic 1.2
Computer Science

Uniform resource locator

The address of a resource on the web.

Example: https://www.igcse360.com/ is a URL.

Read in:Topic 5.1
Edexcel Business

Unincorporated business

A business that is not legally separate from its owner or owners.

Example: A sole trader and the business are treated as one legal person.

Read in:Chapter 3
Business Studies

Unincorporated business

A business that is not legally separate from its owner or owners.

Example: A sole trader and the business are treated as one legal person.

Read in:Chapter 4
Mathematics

Union

Every item in either of two sets, without repeating an item.

Example: The union of {1, 2} and {2, 3} is {1, 2, 3}.

Read in:Chapter 2
Economics

Union membership

The workers who belong to a trade union.

Example: A union's bargaining power may rise as more workers join.

Read in:Chapter 19
Business Studies

Unique selling point

A feature that makes a product stand out from competitors.

Example: A backpack that charges phones has a unique selling point.

Read in:Chapter 12
AS & A Level Business

Unique selling proposition

A clear benefit that makes a product stand out from alternatives.

Example: A delivery service promises same-day arrival.

Read in:Topic 3.3
AS & A Level Economics

Unit of account

A common way to state and compare prices.

Example: A meal costs $8 and a shirt costs $20.

Read in:Chapter 27
Economics

Unit of account

A common way to state and compare prices.

Example: A meal costs $8 and a shirt costs $20.

Read in:Chapter 16
Mathematics

Unit price

The cost of one unit of a product, such as per kilogram or litre.

Example: $6 for 2 kg equals $3 per kg.

Read in:Chapter 16
Mathematics

Unit rate

A rate expressed per one unit.

Example: $15 for 3 kg is $5 per kg.

Read in:Chapter 12
Economics

Unitary elastic demand

When quantity demanded changes by the same percentage as price.

Example: A 5% price rise causes a 5% fall in quantity demanded.

Read in:Chapter 11
Economics

Unitary elastic supply

When quantity supplied changes by the same percentage as price.

Example: A 6% increase in price causes a 6% increase in quantity supplied.

Read in:Chapter 12
AS & A Level Economics

Unitary elasticity

When a 1% change in price causes a 1% opposite change in quantity demanded.

Example: With PED of −1, total spending stays unchanged after a small price change.

Read in:Chapter 3
AS & A Level Economics

Universal basic income

A regular payment given to eligible people without a work or income test.

Example: Each adult receives the same monthly payment regardless of employment.

Read in:Chapter 22
Mathematics

Universal set

The set containing every item being considered in a question.

Example: If the numbers are 1–10, the universal set may contain all ten.

Read in:Chapter 2
Mathematics

Unknown

A value represented by a letter that you need to find.

Example: In 2x = 10, x is the unknown.

Read in:Chapter 23
AS & A Level Business

Unlimited liability

When business owners can be personally responsible for business debts.

Example: A sole trader may have to use personal savings to pay debts.

Read in:Topic 1.2
Edexcel Business

Unlimited liability

The owner may have to use personal possessions to pay business debts.

Example: A sole trader could lose personal savings if the business owes money.

Read in:Chapter 3
Business Studies

Unlimited liability

The owner may have to use personal possessions to pay business debts.

Example: A sole trader could lose personal savings if the business owes money.

Read in:Chapter 4
Accounting

Unpresented cheque

A cheque recorded by the business but not yet paid out by the bank.

Example: A cheque written on Monday clears the bank on Friday.

Read in:Chapter 8
Mathematics

Upper bound

The limiting value at the top of the possible range after rounding.

Example: A length of 8 cm to the nearest cm is less than 8.5 cm.

Read in:Chapter 10
Edexcel Business

Upward communication

Information sent from employees to higher levels of management.

Example: Workers suggest improvements to their manager.

Read in:Chapter 16
Edexcel Business

Urbanisation

An increasing share of people living in towns and cities.

Example: More people move from rural areas into a growing city.

Read in:Chapter 13
ICT

URL

A web address identifying where an online resource can be found.

Example: https://www.igcse360.com/ is a URL.

Read in:Chapter 10
ICT

USB flash drive

Small portable storage that plugs into a USB port.

Example: A student saves a presentation on a USB flash drive.

Read in:Chapter 3
Accounting

Useful life

How long an asset is expected to be used by the business.

Example: A computer may have a useful life of four years.

Read in:Chapter 11
ICT

User documentation

Guides that help ordinary users operate the system.

Example: A help guide explains how to reset a password.

Read in:Chapter 7
ICT

User requirements

The tasks and features users need from a system.

Example: Teachers need to record attendance quickly.

Read in:Chapter 7
Computer Science

Utility software

A program that maintains, protects or manages a computer.

Example: Backup software is a utility program.

Read in:Topic 4.1

V Dictionary terms

Computer Science

Validation

Checking whether input follows sensible rules before accepting it.

Example: A form rejects an age of −5.

Read in:Topic 7.5
ICT

Validation

Automatic checks that data follows set rules.

Example: A form refuses a date outside the permitted range.

Read in:Chapter 7
AS & A Level Business

Validity

How well research measures what it is meant to measure.

Example: A question about buying habits asks about actual purchases, not preferences alone.

Read in:Topic 3.2
AS & A Level Economics

Value added

The increase in value created by a producer, equal to output value minus intermediate inputs.

Example: If a bakery sells bread for $100 using $60 of flour, value added is $40.

Read in:Chapter 6
Computer Science

Variable

A named place to store a value that may change while a program runs.

Example: score starts at 0 and increases as points are earned.

Mathematics

Variable

A letter or symbol standing for a value that may change.

Example: In y = 2x, x is a variable.

Read in:Chapter 19
AS & A Level Business

Variable cost

A cost that changes as output changes.

Example: More output requires more raw materials.

Read in:Topic 5.4
AS & A Level Economics

Variable cost

A business cost that changes as output changes.

Example: A bakery buys more flour when it makes more bread.

Economics

Variable cost

A business cost that changes as output changes.

Example: A bakery buys more flour when it makes more bread.

Read in:Chapter 22
Edexcel Business

Variable cost

A cost that changes as output changes.

Example: More output requires more raw materials.

Read in:Chapter 27
Edexcel Business

Variable costs

Costs that rise or fall with output.

Example: A bakery uses more flour when it makes more bread.

Read in:Chapter 28
Business Studies

Variable costs

Costs that rise or fall with output.

Example: A bakery uses more flour when it makes more bread.

Read in:Chapter 19
AS & A Level Business

Variance analysis

Investigating why actual results differ from budgeted results.

Example: A manager finds that energy prices caused higher expenses.

Read in:Topic 5.5
Mathematics

Vector

A quantity with both size and direction.

Example: Move 3 right and 2 up: this is a vector.

Read in:Chapter 43
AS & A Level Economics

Velocity of circulation

The average number of times a unit of money is used to buy output during a period.

Example: Higher spending with unchanged money supply implies higher velocity.

Read in:Chapter 27
Mathematics

Venn diagram

A drawing with overlapping circles to show relationships between sets.

Example: The overlap shows members shared by two clubs.

Read in:Chapter 2
AS & A Level Business

Venture capital

Investment provided to promising businesses in return for an ownership stake.

Example: A start-up sells shares to an investment fund.

Read in:Topic 5.2
Edexcel Business

Venture capital

Investment provided to promising businesses in return for an ownership stake.

Example: A start-up sells shares to an investment fund.

Read in:Chapter 25
Computer Science

Verification

Checking that data was copied or entered accurately.

Example: A student compares typed data with the original form.

Read in:Topic 7.5
ICT

Verification

Checking that data was copied or entered accurately.

Example: A user compares the typed name with the original form.

Read in:Chapter 7
Mathematics

Vertex

The point where two sides or rays of an angle meet.

Example: The vertex is the corner of a triangle.

Read in:Chapter 33
AS & A Level Business

Vertical communication

Messages moving up or down the levels of a business.

Example: A worker reports an issue to a manager.

Read in:Topic 7.2
AS & A Level Business

Vertical integration

Joining with a supplier or distributor at a different stage of production.

Example: A coffee chain buys a coffee-bean supplier.

Read in:Topic 1.3
AS & A Level Economics

Vertical integration

Combining businesses at different stages of the same supply chain.

Example: A clothing retailer buys a fabric manufacturer.

Read in:Chapter 20
Business Studies

Vertical integration

When a business joins with a supplier or distributor at a different production stage.

Example: A coffee shop chain buys a coffee-bean supplier.

Read in:Chapter 3
Mathematics

Vertically opposite angles

Equal angles opposite each other where two straight lines cross.

Example: If one angle is 70°, its vertically opposite angle is 70°.

Read in:Chapter 37
AS & A Level Business

Video conferencing

Holding meetings through live online video and audio.

Example: Managers in different countries meet using a video call.

Read in:Topic 7.2
ICT

Video conferencing

A live meeting using video and sound over a network.

Example: Students join a remote lesson by video call.

Read in:Chapter 4
Edexcel Business

Viral marketing

Marketing content that spreads quickly as people share it with others.

Example: A funny product video is shared thousands of times.

Read in:Chapter 39
Business Studies

Viral marketing

Marketing content that spreads quickly as people share it with others.

Example: A funny product video is shared thousands of times.

Read in:Chapter 16
Computer Science

Virtual memory

Space on secondary storage used when RAM is insufficient.

Example: The operating system temporarily moves less-used data to disk.

Read in:Topic 3.3
ICT

Virtual reality

A computer-generated environment that users can explore as if inside it.

Example: A VR headset lets students practise in a simulated laboratory.

Read in:Chapter 1
Computer Science

Virus

Malicious code that attaches itself to other files or programs and spreads when run.

Example: Opening an infected program can spread a virus.

Read in:Topic 5.3
ICT

Vishing

Phishing carried out through voice calls.

Example: A caller pretends to be bank staff and requests login details.

Read in:Chapter 8
Economics

Visible trade

International trade in physical goods.

Example: Selling cars abroad is visible trade.

Read in:Chapter 39
Computer Science

Volatile memory

Memory that loses its stored contents when power is removed.

Example: Most RAM is volatile.

Read in:Topic 3.3
ICT

Volatile memory

Memory that loses its contents when power is turned off.

Example: RAM is volatile memory.

Read in:Chapter 1
Mathematics

Volume

The amount of three-dimensional space occupied by an object.

Example: A 2 × 3 × 4 cm cuboid has volume 24 cm³.

Read in:Chapter 40
Mathematics

Volume scale factor

The cube of the length scale factor.

Example: If lengths double, volumes become 8 times as large.

Read in:Chapter 35
Mathematics

Volume unit

A cubed unit used to measure space inside a solid.

Example: A box can have volume 12 cm³.

Read in:Chapter 39
AS & A Level Economics

Voluntary export restraint

An agreement in which an exporting country limits sales to another country.

Example: A car-exporting country agrees to limit annual shipments.

Read in:Chapter 12
Computer Science

Von Neumann architecture

A computer design in which program instructions and data are stored in memory.

Example: A CPU fetches instructions and data from main memory.

Read in:Topic 3.1

W Dictionary terms

Business Studies

Wage

Payment for work, often based on hours worked or items produced.

Example: A worker earns $12 per hour.

Read in:Chapter 6
AS & A Level Economics

Wage differential

A difference in pay between jobs or workers.

Example: A surgeon earns more than a shop assistant because of skill scarcity.

Read in:Chapter 23
AS & A Level Economics

Wage rate

Pay received by a worker for a unit of work or time.

Example: A worker earns $12 per hour.

Read in:Chapter 23
Economics

Wage rate

Pay received by a worker for a unit of work or time.

Example: A worker earns $12 per hour.

Read in:Chapter 18
AS & A Level Economics

Wage-price spiral

When higher wages and higher prices repeatedly push one another upwards.

Example: Workers seek higher pay after price rises, and firms then raise prices to cover costs.

Read in:Chapter 10
AS & A Level Economics

Want

Something people would like but do not need to survive.

Example: A second games console is a want.

Read in:Chapter 27
Economics

Want

Something people would like but do not need to survive.

Example: A second games console is a want.

Read in:Chapter 1
Edexcel Business

Wants

Things people would like to have but can live without.

Example: A new games console is a want.

Read in:Chapter 1
Business Studies

Wants

Things people would like to have but can live without.

Example: A new games console is a want.

Edexcel Business

Waste reduction

Cutting unnecessary use of materials, time, energy and money.

Example: A factory redesigns packaging to use less cardboard.

Read in:Chapter 42
Edexcel Business

Weak currency

A currency that has a relatively low value compared with another.

Example: A weaker pound can make exports cheaper to overseas buyers.

Read in:Chapter 11
AS & A Level Economics

Wealth

The value of assets someone owns minus their debts.

Example: A household’s home and savings contribute to its wealth.

Economics

Wealth

The value of assets someone owns minus their debts.

Example: A household’s home and savings contribute to its wealth.

Read in:Chapter 17
ICT

Weather forecasting

Using data and models to predict future weather conditions.

Example: A meteorologist predicts rainfall for tomorrow.

Read in:Chapter 6
Computer Science

Web browser

An application used to access and display websites.

Example: A browser loads a revision page.

Read in:Topic 5.1
ICT

Web browser

A program used to open and interact with websites.

Example: A student opens a lesson in Firefox or Safari.

Read in:Chapter 10
ICT

Web conferencing

An online meeting that may include screen sharing, chat and video.

Example: A teacher shares slides during a live online lesson.

Read in:Chapter 4
Computer Science

Web server

A computer or service that responds to requests for web pages.

Example: A web server sends a page when a user opens its URL.

Read in:Topic 5.1
Economics

Welfare payments

Government money paid to support eligible people in need.

Example: Unemployment benefits help a jobseeker pay bills.

Read in:Chapter 33
Computer Science

While loop

A loop that repeats while its condition is true.

Example: WHILE attempts < 3 repeats the login attempt.

Read in:Topic 8.1
Edexcel Business

Wholesaler

A business that buys in bulk and resells smaller amounts to retailers.

Example: A wholesaler supplies products to small shops.

Read in:Chapter 38
Business Studies

Wholesaler

A business that buys in bulk and resells smaller amounts to retailers.

Example: A wholesaler supplies products to small shops.

Read in:Chapter 14
ICT

Wi-Fi

Wireless networking technology used to connect devices to a local network.

Example: A tablet connects to school Wi-Fi.

Read in:Chapter 4
Computer Science

Wide area network

A network that connects devices over large distances.

Example: A company links offices in different countries using a WAN.

Read in:Topic 3.4
ICT

Wide area network

A network covering a large geographical area.

Example: A company connects offices in different cities using a WAN.

Read in:Chapter 4
ICT

Wiki

A website that lets authorised users collaboratively create and edit pages.

Example: A class builds a shared information wiki.

Read in:Chapter 10
ICT

Wired network

A network that uses cables to connect devices.

Example: An office uses Ethernet cables for desktop computers.

Read in:Chapter 4
Computer Science

Wireless access point

A device that lets wireless devices join a network.

Example: A school access point provides Wi-Fi coverage.

Read in:Topic 3.4
ICT

Wireless local area network

A local network that connects devices without cables.

Example: A school WLAN connects laptops via Wi-Fi.

Read in:Chapter 4
ICT

Wireless network

A network that connects devices using radio signals instead of cables.

Example: A phone joins a wireless classroom network.

Read in:Chapter 4
Accounting

Work in progress

Goods partly made but not yet finished at the accounting date.

Example: Half-assembled desks are work in progress.

Read in:Chapter 19
AS & A Level Business

Work in progress

Partly completed goods that are still being produced.

Example: A half-assembled bicycle is work in progress.

Read in:Topic 4.2
Economics

Work-to-rule

When employees follow every workplace rule strictly to reduce output.

Example: Workers refuse to do tasks outside their contracts.

Read in:Chapter 19
AS & A Level Business

Workforce planning

Estimating the number and types of employees a business will need.

Example: A hotel plans seasonal staffing before the holiday period.

Read in:Topic 2.1
Edexcel Business

Workforce planning

Estimating the number and types of employees a business will need.

Example: A hotel plans seasonal staffing before the holiday period.

Read in:Chapter 24
Accounting

Working capital

Current assets minus current liabilities.

Example: $9,000 current assets − $4,000 current liabilities = $5,000.

AS & A Level Business

Working capital

Current assets minus current liabilities, used to support day-to-day operations.

Example: A business has $50,000 in current assets and $30,000 in current liabilities, so working capital is $20,000.

Read in:Topic 5.1
Edexcel Business

Working capital

Current assets minus current liabilities; money available for daily operations.

Example: A firm has $10,000 in current assets and $7,000 in current liabilities, leaving $3,000.

Business Studies

Working capital

Current assets minus current liabilities; money available for daily operations.

Example: A firm has $10,000 in current assets and $7,000 in current liabilities, leaving $3,000.

AS & A Level Economics

World Bank

An international organisation providing finance and expertise for development projects.

Example: The World Bank helps fund transport infrastructure.

Computer Science

World Wide Web

Web pages and resources accessed over the internet through web browsers.

Example: A news site is part of the World Wide Web.

Read in:Topic 5.1
ICT

World Wide Web

A collection of linked web pages and resources accessed using the internet.

Example: A student opens a revision website in a browser.

Read in:Chapter 10
Computer Science

Worm

Malware that can spread across systems without attaching to another file.

Example: A worm spreads through a vulnerable network.

Read in:Topic 5.3
Computer Science

Write mode

Opening a file to save new data, sometimes replacing existing contents.

Example: A program opens report.txt for writing.

Read in:Topic 8.3
Accounting

Write off

Removing a debt or asset from the accounts because it is no longer recoverable.

Example: A $60 customer debt is written off.

Read in:Chapter 13
Edexcel Business

Written communication

Sending information in words, on paper or digitally.

Example: A company sends employees a written contract.

Read in:Chapter 16

X Dictionary terms

AS & A Level Economics

X-inefficiency

Production costs being higher than necessary because of weak competitive pressure.

Example: A protected monopoly may tolerate avoidable waste.

Computer Science

XOR gate

A gate that outputs 1 when its two inputs are different.

Example: 1 XOR 0 gives 1.

Read in:Topic 10.2

Y Dictionary terms

Mathematics

Y-intercept

The value where a graph meets the vertical axis.

Example: For y = 3x − 2, the y-intercept is −2.

Read in:Chapter 31
Accounting

Year-end adjustment

An entry made before final accounts to include the correct income and expenses.

Example: Outstanding rent is added before profit is calculated.

Read in:Chapter 12

Z Dictionary terms

AS & A Level Business

Zero defects

An aim of preventing errors rather than accepting a normal rate of defects.

Example: A supplier tries to deliver every item correctly first time.

Read in:Topic 9.2
Edexcel Business

Zero defects

An aim of preventing errors rather than accepting a normal rate of defects.

Example: A supplier tries to deliver every item correctly first time.

Read in:Chapter 45
Mathematics

Zero index

A power of zero, which equals 1 for a non-zero base.

Example: 5⁰ = 1.

Read in:Chapter 22
AS & A Level Business

Zero-based budgeting

Building each budget from zero and justifying planned spending.

Example: A team explains every cost rather than copying last year's budget.

Read in:Topic 5.5
AS & A Level Business

Zero-hours contract

A contract with no guaranteed minimum number of work hours.

Example: A casual worker is offered shifts when needed.

Read in:Topic 7.4

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