Glossary of Common Computer Terms
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Network
Two or more computers that are connected, either by cables or infrared, so that they can share resources such as peripheral equipment and files.
Notebook Computer
A lightweight portable computer. Laptop computers are often called notebooks but they are usually heavier.
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OCR (Optical Character Recognition)
This is the process by which text on paper becomes text in a computer readable format that can be manipulated by the computer or edited in a word processing program. A basic version of OCR software may come with a scanner. This is OK if you have some vision, but people with no useful sight will, probably, need to upgrade to the full version of the software.
Off-line
The computer is not connected to the Internet.
On-line
The computer is connected to the Internet.
Operating System
A crucial piece of software that loads automatically when you switch on and controls how the computer works.
Output
Anything that comes out of a computer like printed pages, sounds and screen images.
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Parallel Port
An interface for connecting external devices such as printers and scanners.
Peripheral
An external device, such as printer, keyboard, scanner and mouse.
POP (Post Office Protocol or Point of Presence)
Protocol used to retrieve e-mail from your Internet Service Provider's server.
Presentation
Software used to create slide shows of documents, slides, transparencies, video images or sounds.
Protocol
A set of standards that allows standardized communication between two or more products.
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RAM (Random Access Memory)
This is where the computer stores temporary programs and information. For instance, when you open an application it is stored in RAM until you close it. The RAM is emptied when the computer is turned off.
Reset Button
A button that is usually located where you can't use it accidentally. It resets the computer to the manufacturer's original settings. Use only in extreme circumstances as the results can be mixed, to say the least.
Resolution
This is a term to describe the clarity or quality of an image produced on screen, by a printer or scanner. The higher the resolution the better the image.
ROM (Read Only Memory)
Relates to data and information that has been pre-recorded and cannot be changed, re-written or over-written - as in CD-ROM.
RSI (Repetitive Stress Injury)
This can happen when you perform the same physical movements repetitively like prolonged use of keyboard or mouse or moving your head constantly when reading the screen. You run the risk of injuring soft tissue such as muscles, nerves, tendons and joints. If left untreated, there can be permanent damage. Take regular breaks from the computer and position your chair, screen, keyboard and mouse where you can use them comfortably.
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Definitions supplied by Electronic Aids for the Blind under the Creative Commons Licence.