(AQA) ICT - Computer Systems

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Hardware
The physical objects that make up a computer system, such as computers, monitors and printers
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Input
Data entered into a system. Examples are; Bar codes scanned in at supermarkets or key strokes entered by a typist
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Output
The action that occurs after an input has been processed. For example, the name and price of an item is displayed on a monitor following a bar code scan
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Processing
Turning the input into a useful form. For example, comparing bar code data with a database to analyse which item it corresponds too
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Stored
Information is kept for later use, for example, information on the stock level after the item has had a bar scan
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Devices
Pieces of hardware. For example, a monitor is an output device
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Microprocessor
A silicon chip that contains a central processing unit, which acts as the 'brain' of a computer
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CPU
Central processing unit; the part of the computer that does most of the data processing
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Operating systems software
Controls and manages the computer. For example, windows, Mac OS and Linux
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Applications software
Computer programs that are designed to carry out specific tasks
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ROM
Read-only memory
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RAM
Random-access memory
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Boots up
When the computer is switched on, it automatically performs a set of processes to allow the computer to be used
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Other cards in this set

Card 2

Front

Data entered into a system. Examples are; Bar codes scanned in at supermarkets or key strokes entered by a typist

Back

Input

Card 3

Front

The action that occurs after an input has been processed. For example, the name and price of an item is displayed on a monitor following a bar code scan

Back

Preview of the back of card 3

Card 4

Front

Turning the input into a useful form. For example, comparing bar code data with a database to analyse which item it corresponds too

Back

Preview of the back of card 4

Card 5

Front

Information is kept for later use, for example, information on the stock level after the item has had a bar scan

Back

Preview of the back of card 5
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