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History of the computer

It can be consider from arise of human culture as person known as calculation. ABACUS (plural abaci or abacuses), also called a counting frame, was the first calculating device .

Generations of Computer

There are five computer generations known till date.Computer generations are based on when major technological changes in computers occurred, like the use of vacuum tubes, transistors, and the microprocessor.

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Computer - Generations
Generation
Date
Description
First1940–1956vacuum tubes ENIAC, UNIVAC I
Second1956-1963discrete transistors IBM 7090, UNIVAC 1107
Third1964-1971integrated circuits IBM System/360, UNIVAC etc.
Fourth1971-presentmicroprocessors PDP-11/03 and IBM PC
Fifthcurrent researchartificial intelligence and quantum computing
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