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Charles Babbage invented the difference engine in 1822, the exact date is not known, the difference engine worked by punching numbers into cards to get different outputs. Source:
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Konrad Zuse, a German engineer unveiled the Z3, a device that was faster and could compute more advanced equations than any other device. Source:
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The EINAC was a British made all purpose calculating machine. It was the first fully functional electronic computer and was put into service at the University of Pennsylvania. Source: http://www.computerhope.com/history/194060.htm
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At a price of $120 each, integrated circuits are being commissioned on the Gemini Spacecraft. Source: http://www.computerhope.com/history/1960.htm
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IBM releases the first selectric typewriter Source: http://www.computerhope.com/history/1960.htm
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IBM releases the 7030 Stretch Supercomputer, the first 64 bit. Source: http://www.computerhope.com/history/1961.htm
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Dennis Ritchie and Kenneth Thompson complete the UNIX system. Source: http://www.computerhistory.org/internethistory/1970s/
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BBN modifies the design of the IMP to make this possible. Source: http://www.computerhistory.org/internethistory/1970s/
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Apple announces they will release their personal computer, the Macintosh. Source: http://www.computerhistory.org/internethistory/1980s/
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The Microsoft company reaches $1 Billion in sales. Source: http://www.computerhope.com/history/1990.htm
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The World, a internet service provider, releases dial up internet commercially. Source: http://www.computerhope.com/history/1990.htm
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Microsoft release Windows 3.0, they sold more than 3 million copies. Source: http://www.computerhope.com/history/1990.htm