Coherent (operating system)
The
Coherent operating system was introduced in
1983 by the now-defunct Mark Williams Company as one of the first
Unix-like computer operating systems for IBM PC-compatible
computers. Coherent was capable of running on most Intel-based PCs with
286,
386, and
486 processors and, like a true
Unix, was capable of
multitasking and of having multiple users. Coherent also had support for
X11.
Coherent is sometimes mistakenly referred to as "Coherent Unix", which is incorrect. Coherent was based on the specifications of Unix Version 7, without reference to any of the Unix source code, either from Bell Labs or BSD.
The Mark Williams Company went bankrupt in 1995.
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