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Where Did UNIX Come From And Why Are There Different Versions Of UNIX?
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The first efforts at developing a multi-user, multi-tasking operating system
were begun in the 1960's in a development project called MULTICS. While working
for Bell Telephone Laboratories in 1969 and 1970, Ken Thompson and Dennis
Ritchie began to develop their own single-user, multi-tasking small operating
system and they chose the name UNIX. Their initial goal was simply to operate
their DEC PDP machines more effectively. In 1971, UNIX became multi-user and
multi-tasking, but it was still just being developed by a small group of
programmers who were trying to take advantage of the machines they had at hand.
(In other words ....
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