But UNIX really isn't a single operating system any more, it's a "standard" or "certification", the "Open Group" is the holder of the name and certifies operating systems to be called "UNIX". Go to the Open Group's web site for more info on this. If you want UNIX in it's purest form you are going to have to go back to the old labs at Bell.
History of UNIX at Bell Labs:
http://www.bell-labs.com/history/unix/The Open Group:
http://www.opengroup.org/Now there are only a small few operating systems that carry the "UNIX" certification. Solaris (Sun), AIX (IBM), HP-UX (HP), BSD (Berkeley), Tru64 (Compaq), SCO (now owned by Caldera), and a couple more are either UNIX 95 or UNIX 98 certified:
http://www.opengroup.org/regproducts/catalog.htmOnly a few of those are capable of running on x86 PC hardware, the rest run on other platforms.
The closest I have ever come to working on what I would consider to be UNIX in it's purest form would have been an old version of AT&T SysV UNIX running on a 3B2 machine probably built in the mid to late 80's. But it certainly wasn't a pretty sight by today's UNIX certified OSs.
[ September 06, 2002: Message edited by: void main ]