The word computer means to compute or to calculate. So a computer is normally considered to be a calculating device.

But, more than 85% of the work done by computer today is of non-mathematical. Hence, a computer may be defined as a device that operates upon data or information. So computer can be defined as a machine in which we can

- Store data or information,
- Process data or information,
- Retrieve data or information

With our requirements

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