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Soviet Sputnik Launch, prompting the US to form ARPA.
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ARPA creates ARPANET
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First Email Program is created
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ARPANET links computers at more then 200 sites
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DOD builds Defense Data Network based on ARPANET.
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ARPA splits into ARPANET and Milnet. Internet is in place
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ARPANET ceases to exist
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World Wide Web (WWW) is launched
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Internet links more than 17k networks in 33 countries
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Internet has more than 3 million users
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102 million people use the Internet worldwide