Abstract: The word Computer is derived from the word “to compute”, which means ‘to calculate’. Therefore, many people think that a computer is just another calculating machine- a fast calculator. But it is much more than that. It is not just a fast calculating device. It can perform a variety of different operations apart from arithmetic calculations. A computer is now regarded as a multi-purpose tool that is constantly evolving. It can be used also used for knowledge sharing. It can be used to handle audio and video information. It can also be used for communicating messages. Thus, it can be used for a variety of different purposes. Early computers were used to perform arithmetic calculations at fast speed, but now they are used in almost all to represent facts, things, concepts of our life. A computer can be defined as a machine that receives some kind of data, process it, and produces some kind of output. Computers perform data processing under the direction of instructions given by us. These instructions can be stored in a computer. A computer is a machine that can solve problems for us by executing instruction given to it. In this era of technology revolution and with a great boom in the field of information technology, knowledge of computers becomes very essential for every one. Information technologies have played a vital role in higher education for decades.