COMPUTER SYSTEMS

By Ellie Massey

Input and Output Systems

input and output devices are used by a human (or other system) to communicate with a computer. For example a keyboard and a mouse are input devices to a computer, while monitors and printers are output devices. Input is the data received by the system and output is data sent from it.
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Optical Drive

An optical drive is a drive that uses laser light or electromagnetic waves near the visible light spectrum as part of the process of reading or writing data to or from the optical discs. Some drives can only read from a certain disc, but more recent ones can read and record, which are also called burners or writers.
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MOTHERBOARD

A motherboard is the main circuit printed board, found in mainly computers. It holds and allows communication between many of the electronic components of a system, such as a central processing unit. A motherboard contains sub-systems such as the processor.
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OPERATING SYSTEMS

An operating unit is the most important software on a computer. It manages the computer's memory, processes, and the hardware and software. The operating system also allows you to communicate with the computer without knowing how to speak the computer's "language".
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RAM

RAM stands for random-access memory. It is a form of storage. A RAM memory device allows data items to be accessed. When stored, information is lost when power is removed. A RAM memory device allows data items to be read and written in approximately the same amount of time.
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LONG TERM MEMORY

The long term memory of a computer (also known as LTM) is the final stage of the dual model. While short term memory persists of only 18 to 30 seconds, whereas LTM can hold memory for ages. Long term memory has also been called reference memory because an individual must refer to the information in long term memory when performing a task.
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