A computer is a programmable device that stores, retrieves, and processes data. … The term was later given to mechanical devices as they began replacing human computers. Today’s computers are electronic devices that accept data (input), process that data, produce output, and store storage the results.A computer is a machine that can store and process information. Most computers rely on a binary system, which uses two variables, 0 and 1, to complete tasks such as storing data, calculating algorithms, and displaying information.Computer has become very important nowadays because it is very much accurate, fast and can accomplish many tasks easily.
TYPES OF COMPUTER:-
* ANALOG COMPUTER.
* DIGITAL COMPUTER.
* MAINFRAME COMPUTER.
An analog computer or analogue computer is a type of computer that uses the continuously variable aspects of physical phenomena such as electrical, mechanical, or hydraulic quantities to model the problem being solved planimeters, nomograms, operational amplifiers, mechanical integrators, slide rules, tide pool predators, electric integrators are some examples for analog computers.
Digital computer, any of a class of devices capable of solving problems by processing information in discrete form. It operates on data, including magnitudes, letters, and symbols, that are expressed in binary codes using only the two digits 0 and 1.smartphones, calculators, tablets, personal computer are some examples for Digital computers.
A mainframe computer, informally called a mainframe or big iron, is a computer used primarily by large organizations for critical applications like bulk data processing for tasks such as censuses, industry and consumer statistics, enterprise resource planning, and large-scale transaction processing. IBM zSeries, System z9 and System z10 servers are some examples for Mainframe computers.