Comparison of UNIX implementations (help requested)

[Eugene Miya]

I am posting the following for another person PLEASE reply to her directly
and not to me.  (--eugene)

I am interested in evaluating the most common implementations of Unix
(i.e. 4.2 BSD, System V & Xenix) with regards to:

	1) Ease of use (user-interface)
	2) Implementation details (i.e. virtual memory)
	3) Target machines (i.e. VAX, 68000, 8086, etc.)

The eventual goal is to decide on which Unix system to bring up on a
proprietary machine (that is still in the design stages). Can anyone point
me to a good article which addresses some/all of these issues, or even send
me useful tips off the top of your head? I'll summarize and post the 
results to net.unix if it seems appropriate.

						Much Obliged,

						Amy Jo Bilson
						{hplabs,hao}!ames!aurora!amyjo
						ames!aurora!amyjo at riacs.ARPA