Computer Science,JSS 1 Week 2
Topic: The Device
A device is any machine or tools used for a particular purpose. It is a tool used to perform a specific function. It is an object, machine, or piece of equipment that has been made for some special purpose. Any machine or component that attaches to a computer. Examples of devices include disk drives, printers, mice, and modems. In computer technology, a device is a unit of hardware , outside or inside the case or housing for the essential computer (processor, memory, and data paths) that is capable of providing input to the essential computer or of receiving output or of both. When the term is used generally (as in computer devices ), it can include keyboards, mouses, display monitors, hard disk drives, CD-ROM players, printers, audio speakers and microphones, and other hardware units. Some devices such as a hard disk drive or a CD-ROM drive, while physically inside the computer housing, are considered devices because they are separately installable and replaceable. With notebook and smaller computers, devices tend to be more physically integrated with the “non-device” part of the computer.
Classes Of Device
Devices can be classified into any of followings
- Early Counting Device: Early counting devices are devices that were used by man for counting during the primitive era. E.g. finger, stone, marbles. E.t.c
- Mechanical Devices: Mechanical devices are devices that were used to perform mechanical function before the invention of the more sophisticated computer system. E.g. abacus. Slide rule e.t.c they perform the function without making use of electricity.
- Electronic Devices: Electronic devices are devices that make use of high voltage electricity. E.g. electric grinding machine, printing machine.
- Electronic Devices: Electronic devices on these parts are devices that use relatively low voltage supply. E.g. computer system, home appliances such as television, radio, and also office appliances.
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