The term 'computer' is derived from Latin word Computare which means - calculate. Similarly, in English language Calculate means to do mathematical operation. About 40/50 years ago, calculator was introduced. Calculator computes the numbers. This is also a digital operating device. But, computers originated with a huge size and extreme processing capabilities. Computer has become very powerful device to aid the development in the field of data processing and research. Therefore, it has become almost indispensable in modern technologies. Computer capabilities can be summarized in points as follows:
- Computer is a device capable of calculating very fast and accurately.
- Computer is a device which is capable of accessing data from a remote work station.
- Computer is a device capable of storing millions of data and information in a small storage device.
- Computer is a device which can give logic and follows the instructions given in program.
- Computer never gets tired and it can perform repeated calculations.
- Computer helps in the logical development of human mind and in precise work.
- Computer takes data as input and after processing gives out the processed result which is called output.
In other words, computer is a fast and accurate electronic symbol (or data) manipulating system that's designed to automatically accept and store input data, process them and produce output results under the direction of stored program of instructions.
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