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First electro-mechanical computer, using mechanical devices, weighed 5 tons, it used about 750,000 parts.
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First electronic high speed general purpose computer using vacuum tubes.
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First stored computer programs
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First commercial automatic computers
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Transistors were used as main logic elements, magnetic tapes and disks and magnetic cores to store data
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First highly successful mass produced personal microcomputer.
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Integrated circuits was an entire CPU in one circuit.
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The IBM PC (Personal Computer) was one of the best and most advanced commercial computer to be made.
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The First Macintosh was targeted mainly at home, education and creative professional markets and was very useful.
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Now they are making extremely advanced computers with touchscreen, high definition screens, fast processors and easy to carry around.