I thought all encumbered AT&T sources now belong
to Caldera, the Linux house, and are thus freely
available as a "fee free" license from Caldera.
The only things that are not, are SysIII and
SysV bits that postdate 32V and "derivatives".

Ultrix is a 4.2BSD derivative, isn't it, and
thus under Caldera's fee free license for any
AT&T socalled encumbered bits?

Just thinking out loud.

Bob