Introduction to Computer

computer is a man-made, programmable electronic machine that can store, retrieve, and process data according to a given set of instructions. Whatever information given to a computer is termed input. The computer input typically comprises of two things: Data and Instructions. The data are the facts, which are to be processed, and the instructions describe how the computer should process the data. The data which has been converted or organized into a more useful or intelligible form for direct utilisation or helps human beings in their decision making process is typically termed information.

The heart of the computer is a microprocessor chip. Today microprocessors are embedded inside various every-day machines such as cars, television sets and washing machines. These microprocessors usually control some function of the machine and are hidden from the user. The term computer can virtually be applied to any such device that has a microprocessor in it.
However most people describe a computer as a device that comprises of a keyboard, mouse, a central processing device and a screen.