The literal meaning of the word computer is an instrument that does various calculations. It is a wonderful electronic device for storing, analyzing, and emitting data. It has no capacity to do anything by itself. It works on the basic of commands given by the operator.
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A computer consists of five major components. They are the input unit, the output unit, the memory unit, the control unit and the arithmetic unit. The history of its invention is very long and none can claim to be its sole inventor. From pascal to Haward Akin numerous scientists contributed to its invention and still it is being enriched by many other scientists.
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Computer is of great use to us. It is like Aladin magic lamp or magic word. It has lessened our work loads and made our life easy and comfortable. It is already used in industries, universities, offices and many other places. Sometimes the young ones get addicted to using computer for games and sports. Though the world is far advanced with computer, Bangladesh is at its initial stage with it. So we should try to develop this sector here.