UnixWars

Extracted from Wikipedia: “The Unix wars were the struggles between vendors of the Unix computer operating system in the late 1980s and early 1990s to set the standard for Unix thenceforth. These battles are commonly said to have harmed the market acceptance of Unix and created a market gap that allowed the rise of Windows NT”.

“In the mid-1980s, the two common versions of Unix were BSD, from the University of California, Berkeley, and System V, from AT&T. Both were derived from the earlier Version 7 Unix, but had diverged considerably (this conflict was also known as the ‘UNIX wars’ to some degree). Further, each vendor’s version of Unix was different to some degree.“.

There’s also a short story titled ‘Unix Wars’ written in 1987 by Eric S. Raymond that seems to be inspired in an older writing called ‘DEC Wars’. You can find the whole story at the following link: http://insecure.org/stf/unixwars.txt