"Interestingly, the CD's Credits file mentions Ralph Yarro,
among others. The copyright information states that they used Red
Hat's Linux and then added some tweaks of their own to it, and they
list files and applications that were not under the GPL, and none
of the files in the screenshots are listed as excluded. All the
rest, they say, were distributed under the GPL. The Announce file
is particularly interesting, because it mentions ELF directly, and
that speaks to whether SCO knew what they were distributing under
the GPL. I asked Dr Stupid to look at the screenshots and tell me
what it means to him, and here's what he told me:
"Well, it's confirmatory evidence that Caldera shipped errno and
STREAMS under the GPL, in particular that they took the conscious
decision to include STREAMS (since Red Hat didn't.)"