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A computer is a machine that manipulates data according to a list of instructions.Computers take numerous physical forms. The term hardware covers all of those parts of a computer that are tangible objects. Circuits, displays, power supplies, cables, keyboards, printers and mice are all
hardware. Software refers to parts of the computer which do not have a material form, such as programs, data, protocols, etc. When software is stored in hardware that cannot easily be modified. As the use of computers has spread throughout society, there are an increasing
number of careers involving computers. The activity of designing and constructing and programming computers is called Computer Technology.