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  Founded in 1889 and by Fusajiro Yamauchi
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  Founded in 1889 and by Fusajiro Yamauchi.
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  1922 and by Ralph H. Baer.
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  Conceived in 1937 and by John Vincent Atanasoff.
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  1) What is the time frame of the first generation of computers invented? Vacuum Tubes1940-1956
 What significant invention allowed computers to work for the first generation? They use the vacuum tube of a vacuum to make a work.
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  1956 and by John Mullin.
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  Artificial Intelligence 1956
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  1958–1962 and by Kenneth Olsen.
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  1960s and by Edson de Castro.
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  1960s and by Edson de Castro.
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  Integrated Circuits1964-1971
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  Microprocessors 1971
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  Sept. 25, 1973 William Shockley.
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  1980 and by Michael Hart
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  August 12, 1981 and by Don Estrange.
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  1981 and by Michael Dell.
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  1990 and by Kodak.
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  1992 and by Nokia.
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  January 3, 1977 and by Steve Jobs and Steve Wozniak effectively.
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  2) What is the time frame of the Second generation of computers invented? Transistors1956-1963