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Where Did UNIX Come From And Why Are There Different Versions Of UNIX?
Beginning of paper
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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 na .... Middle of paper
.... the
Bell System, their parent company, AT&T, became much more interested in
marketing a commercial version of UNIX. And today we see that many companies
have now licensed their own version:
AT&T's System V,
Versions of System V such as SCO's Xenix and IBM's AIX
Berkeley's UNIX (called "BSD" for "Berkeley System Development"),
Versions of Berkeley UNIX such as Sun Microsystem's SunOS, DEC's Ultrix and
Carnegie Mellon Universi ....
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Number of words: 276
Number of pages: 2 (approx. 250 words per double-spaced page)
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