Thanks for the link. I did a few Xenix/FoxBase systems in the late 80's. It was nice to see the [Xenix] moniker agin?:-).

>System IV was never released
>
>A brief history of UNIX
>
>http://www.info-discovery.com/solaris/html/node4.html
>
>>I had heard (in the late 80's), that ATT System IV had become public domain. Did that happen?