Unix System
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The Computer Chronicles - UNIX (1985)
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The Untold Unix Story
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AT&T Archives: Seeing the Digital Future (1961)
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Ken Thompson interviewed by Brian Kernighan at VCF East 2019
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UNIX: Making Computers Easier To Use -- AT&T Archives film from 1982, Bell Laboratories
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Microsoft's forgotten UNIX operating system - Whatever happened to Xenix?
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The mind behind Linux | Linus Torvalds | TED
28:16