How to find VERSION of UNIX OS

[Chuck Davisson]

>From article <1991May22.163628.12135 at njitgw.njit.edu>, by madhua at mars.njit.edu (madhu aiyappen ):
> 
> The subject says it - what is the command to find
> the Version and Release of UNIX Operating System
> (other than finding it in /etc/motd)?
> 
> Any simple commands? Thanks for any help.

I have it working on a Sun 3 with SunOS 4.1.1, a Sun3 with SunOS 4.1 and
a Sun3 with SunOS 4.0.3.  On the 4.0.3 system the -v option doesn't pick
up the ".3" in 4.0.3.  Also on the 4.0.3 system, uname is part of the
optional System V stuff in /usr/5bin.