
Apple Computer
is being sued by The Open Group, the San Francisco company that claims ownership of the Unix trademark, for using the term Unix in conjunction with its Mac OS X operating system without a license. Apple has countersued, asking a judge to declare that the trademark is invalid, because the term Unix has become generic. This legal battle, though separate from SCO's recent claim that Linux uses copyrighted Unix source code, adds further fire to the debate over the custody of Unix--the 30 plus-year old OS originally developed by AT&T.
UNIX is a trademark.
Unix is the generic.
The Open Group's web site even says you have to put the word in all caps. Thus the question is: Did Apple say "Mac OS X is UNIX based" or "Mac OS X is Unix based"? The difference is major: the 1st means that Mac OS X is based a registered version of UNIX; the 2nd means that it is UNIX like.