David Laight said:

>Any patents on Unix itself are likely to have long since expired.
>Even anything from the days of the SVR4 merge is likely to expire soon.
>So most of the AT&T patents will be gone, I doubt as either Novell
>or SCO put much that might be (sensibly) patentable into the kernel.

The current SCO UNIX source is called SVR5, with SVR6 in the wings.

The odd thing is that even as they threaten Linux distributors and users,
they are still allowing free downloads of Caldera/SCO Linux from their
ftp site.
-- 
Rick Kelly  rmk@rmkhome.com  www.rmkhome.com