A computer is an electronic machine that can store, organize and find information, do calculations, play music and games and control other machines. It also can perform many other functions. It has no capacity to do anything by itself. It works on the basis of commands given by the operator. The invention of computer has a long history. It was not invented overnight. It took a long time and hard labour to invent computer. A computer has five major components. They are the input unit, the output unit, the memory unit, the control unit and the arithmetic unit. A computer performs three basic functions. Firstly, it receives data. Secondly, it processes data by various computations, and thirdly it emits data. It helps us doing our gigantic and complex works within a surprising short time. It can also help us finding out data and information. It has eased modern life to a considerable extent. We watch many recreational programmes on it at our leisure period. So, it helps us in many ways making our work easy and enjoyable. We can study computer at different institutions both at home and abroad. If we just want to know the elementary uses of computer, we can take the help of any renowned computer training centre. But if we want to have or gain a greater idea of computer, we should get ourselves admitted to a university to study computer science. Nowadays at every institutions, both govt. and non-govt.. such as bank and insurance, commercial enterprises, retailers, offices, educational sectors, medical science etc., computer is a must. It is like Aladin's lamp. We cannot go a single moment without computers. It is now part and parcel of our daily life.
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