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The term computer is used to describe a device made up of electronic and electro mechanical components. The computer itself cannot perform any task and is referred to as hardware.

A computer system consists of three elements.

1. Hardware

2. Software

3. People

Hardware : The physical components which you can see, touch and feel in the computer system are called hardware Eg monitor, keyboard, mouse etc.

Software : Software is used to describe the instructions that tells the com-puter how to perform a task. Software is categorized

1) System softwares ( eg . operating systems, compilers, editors etc)

2) Application softwares ( MS-word, excel, accounting packages etc)

People : People who operate the computer and also create computer soft-ware instructions.

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