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Unix
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Descendant
of Multics
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First
“C” version in 1973 (DEC PDP-11)
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Timesharing
for < 10 users on 32K Memory
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Many
Unix versions at BTL – different goals
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Source
code made available to Universities – BSD
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Posix
(start 1981) defines standard Unix system
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calls
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AT&T
licensing!
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