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In 1886 first commercially mechanical adding machine that was successful is developed by William Burroughs
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In 1889 Hollerith tabulating machine issues patent
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In 1896 Hollerith constructs a sorting machine through the Tabulating Machine Company founded by himself
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In 1972 an 8 bit microprocessor is introduced by Intel
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The first portable Macintosh computer
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NCSA released the browser in 1993
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December 1993 Windows For Workgroups 3.11
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