USG Unix

from The Free On-line Dictionary of Computing (8 July 2008)

USG Unix

   {operating system} /U-S-G yoo'niks/ Refers to AT&T {Unix}
   commercial versions after {Version 7}, especially System III
   and System V releases 1, 2, and 3.  So called because during
   most of the lifespan of those versions AT&T's support crew was
   called the "Unix Support Group".

   Compare {BSD}.

   [{Jargon File}]

   (1997-02-20)