Differences between versions of UNIX

[Jeffrey Edelheit]

I have been given an assignment that involves doing a detailed analysis
of the differences between System III and System V, bsd 4.1 and bsd 4.2,
and System III and bsd 4.1/4.2.

Does anyone have some pointers, suggestions as to where to start?  I realize
that System V was the first version that had full AT&T support, and that it
was the first version that supported writer's workbench, but information at
that level doesn't help.

Thanks.

Jeff Edelheit
(edelheit at mitre)