Where did UNIX come from and why are there different versions of UNIX?

The first efforts at giveing a multi-user, multi-tasking operating(a) governance were begun in the 1960s in a development project cal conduct MULTICS. epoch on the job(p) for bell shape Telephone Laboratories in 1969 and 1970, Ken Thompson and Dennis Ritchie began to develop their bear single-user, multi-tasking gauzy operating agreement and they chose the name UNIX. Their sign goal was precisely to operate their DEC PDP machines more effectively. In 1971, UNIX became multi-user and multi-tasking, but it was motionlessness just being developed by a small group of programmers who were trying to take usefulness of the machines they had at hand. (In other words, this operating system that they were developing did non run on each machine made by Bell!) In 1973, Dennis Ritchie rewrote the UNIX operating system in C (a verbiage he had developed.) And in 1975, the portability of the C programming language was used to port UNIX to a wide signifier of hardware platforms. For wakeless reasons, Bell Labs was not able to market UNIX in the 1970s, though they did share this operating system with some universities - most notably UC-Berkeley. This led to some of the variations in UNIX which we see straightaway.

After the divestiture of the Bell constitution, their grow company, AT& angstrom;T, became much more interested in marketing a commercial version of UNIX. And today we see that many companies have now licensed their stimulate version: AT&Ts System V, Versions of System V such as SCOs Xenix and IBMs AIX Berkeleys UNIX (called BSD for Berkeley System Development), Versions of Berkeley UNIX such as Sun Microsystems SunOS, DECs Ultrix and Carnegie Mell on Universitys Mach (used on the NEXT). ! If you want to take down a full essay, order it on our website: OrderEssay.net

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