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it was invented in 1942.
Charles Babbage, an English mechanical made it. -
The computers made in the second generation were completely based upon transistors, not on vacuum tubes. Until the late 1950s, the use of transistor did not see widespread in computers; however, it was invented at Bell Labs by Walter H. Brattain (1902-1987), John Bardeen (1908-1991), and William B.
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The period of third generation was from 1965-1971. The computers of third generation used Integrated Circuits (ICs) in place of transistors. A single IC has many transistors, resistors, and capacitors along with the associated circuitry. The IC was invented by Jack Kilby.
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VLSI circuits having about 5000 transistors and other circuit elements with their associated circuits on a single chip made it possible to have microcomputers of fourth generation. Fourth generation computers became more powerful, compact, reliable, and affordable.
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The Fifth Generation Computer Systems (FGCS) was a 10-year initiative begun in 1982 by Japan's Ministry of International Trade and Industry (MITI) to create computers using massively parallel computing and logic programming.