classification of computer

The word computer is derived form the Latin word computear. Which means a calculating machine.Computers are available in different sizes with different capabilities.They may be classified in the following four categories.
1.Super Computer
2.Mainframe Computer
3.Mini Computer
4.Micro or personal Computer(PC)

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Invention history of computer

The Computer is a fairly recent invention

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It has become an essential part of modern life.The true ancestor of the modern computer was designed by the English mathematician,Charles Babbage in the 1830`s.This machine,called the Analytical Engine,was never completed but it was intended to perform any mathematical calculation automatically by means of a mechanical device.His idea was put into practice in1944 by Professor Howard Aiken of Harvard University,who in association with the International Business  Machines Corporation(IBM),completed the Automatic Sequence controlled calculator(ASCC) or Mark-1, It was a mechanical computer,and not an electronic one.The first eletronic digital computer,called the Numerical Integrater and Calculator(ENIAC) was completedin1946 by a team of scientists at the university of Pennsylvania.

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