Key Words

Analogue -

Analogue signals are continually variable and even small fluctuations in the signal are important. Analogue systems use continuous ranges of values to represent information.

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  • Created by: kateedx
  • Created on: 15-05-14 09:59

Analogue

Analogue signals are continually variable and even small fluctuations in the signal are important. Analogue systems use continuous ranges of values to represent information.

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Digital

Digital signals have discrete values such as on/off, 1 or 0. In-between values are not used.

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Personal Computer

These include netbooks, laptops, notebook computers, palmtops, desktop computers, tablet computers, PDAs and handheld computers. Used for web searching, email, running applications, e.g. word-processing, spreadsheets, databases, and many other software applications in homes and offices

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Mainframe Computer

Large computers used in banks, insurance firms where very large amounts of data have to be processed quickly

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Super Computer

Very fast computers used in universities and other areas where complex calculations are needed and speed of calculation is important

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Input

Entering data into a computer system is input

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Processing

Data is converted it from one form to another. This is done by following a set of instructions and commands.

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Output

When the results of processing are shown, this is output

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Storage

Data is kept or recorded while waiting to be used or for future use.

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Network

When computers are connected together so that they can share data and devices such as printers, they are said to be in a computer network

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Interface

This is where data is transferred between computer devices or between people and computers.

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USB Interface

This is where data is transferred between computer devices or between people and computers.

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Peripheral Device

Any device that is not actually part of the computer but is attached to a computer is called a peripheral device. Peripheral devices are seen as expanding the system and include scanners and printers.

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ROM

Read Only Memory is a permanent storage area of memory that does not lose its data when power is turned off – it is said to be non-volatile. Data can only be read from ROM, not written to it.

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BIOS

The Basic In Out System that is needed to tell the computer what to do on startup

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