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  Vacuum tubes used for circuitry and magnetic drums.
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  Antanasoff-Berry-Computer (ABC) was invented by John Atanasoff and Clifford Berry.
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  Transistors were used.
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  IBM PC (International Business Machines personal computer) was invented by Philip Don Estridge.
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  Minicomputer was invented by Seymour Cray.
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  Used integrated circuits.
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  Game consoles were invented by Ralph H. Baer.
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  DEC PDP-8 (Digital Equipment Corporation) was invented by C. Gordon Bell and Edson de Castro.
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  Nintendo was invented by Gunpei Yokoi.
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  Use microprocessors.
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  E-books were invented by Michael S. Hart
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  Microcomputer was invented by Ed Roberts.
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  Apple computer was invented by Steve Wozniak and Steve Jobs.
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  Digital camera was invented by Steven Sasson.
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  Laptop was invented by William Moggridge.
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  Personal computer was invented by Philip Don Estridge.
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  Kodak DCS (Digital Camera System 100) was invented.
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  Web cam was invented by the Cambridge University science department.
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  Smartphones was invented by IBM.
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  Artificial Intelligence