how computer is useful in present generation ? explain
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The various generations of computers are:
First generation — vacuum tubes (1940–1956)
(ENIAC, UNIVAC I, IBM 650, IBM 701 etc.)
Second generation — transistors (1956-1963) (IBM 7090 and 7094, UNIVAC 1107, PDP-1 and 8, etc.)
Third generation — integrated circuits (1964-1971)
(IBM System/360, UNIVAC 1108, PDP-8/I, PDP-11/20 and PDP-11/45, etc.)
Fourth generation — microprocessors (1971-present)
(PDP-11/03 and PDP-11/34, Apple ][, IBM PC, Apple Macintosh, IBM z Series, etc.)
Fifth generation — artificial intelligence and quantum computing (current research)
So except for some research computers, and ones in museums and collections, all computers being used today are fourth generation.
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The period 1940 to 1956, roughly considered as the First Generation of Computer.
The first generation computers were developed by using vacuum tube or thermionic valve machine.
The input of this system was based on punched cards and paper tape; however, the output was displayed on printouts.
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