A computer is a device that manipulates data according to a sets of instructions. Nearly all computers are based on the use of electronic circuit ,although a computer does not have to be electronic.Three elements required for a computer to perform useful task hardware, software and the computer's user.
The piece of equipment that make up a computer system are called hardware. Many parts are contain with in the computer's case. Other parts are connected to the computer.These allow information's to be entered and retrieved.
The instructions that a computer follows come from software. Operating systems, spreadsheet programs and payroll programme are example of software.Software means that the same hardware can be put to a variety of use.
Software provides an interface for the user to control the computer system. The user create data files by typing data and selecting commands from the interface.
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