A computer was created for computing fast—a purely mathematical function. Today they are used to forecast the weather, to operate machines, to cut steel to size and even to guide a spacecraft to the moon. Computers help to trace criminals and are used in the airlines industry. The whole world of airlines functions efficiently with its help.
Hotels make use of them from managerial functions to kitchen operations, and companies use them for accounting, invoicing etc. Thus, a computer is a data processing device which acts upon data coming to it in all shapes and sizes. It deals with the science of information processing, invoicing, recording, manipulating and retrieving information. Computers are electronic devices in which all information stored as patterns of electrical pulses. A computer has to be programmed as per the requirement, either to guide a missile or to write poetry. In the years to come, energy-efficient technologies be at a premium; the microprocessor as the key machine will lead the industry.
It could easily be concluded that in the long run, computerisation on a large scale will essentially become a matter of survival. Hence, it is really important to bring an awareness of computers among the common people.