Would you like to see some places where Caldera has copyright notices in Linux on code it contributed under the GPL, and you're frustrated because some of us have Caldera CDs and you don't? Just go to Google code search and search for
license:gpl "caldera.com" You'll be buried in GPL'd Caldera code, 5,000 hits.
Say, what have we here? Near the top of the list we find binutils-2.16.1/include/elf/common.h and the text includes a mention of the numbers being assigned from registry@caldera.
Ooh, what have we next? I spy a contribution to minix3.org's binutils-2.16.1, under the GPL too. My, my.
Turn to page 2, and we find a contribution to UnixWare by Ron Record to samba-2.2.12/packaging/Caldera/UnixWare/pkg/postinstall. Hmm. Funny those SCO employees didn't tell the world about all this GPL code, isn't it?
Oh and UnixCW was copyrighted by Simon Baldwin at Caldera in 2001. GPL.
So where were these folks when SCO was making the public claim that it never contributed any code under the GPL?
Lookee here: On page 3, on a server in Utah, no less, it shows a copyright by Alan Cox on SMP, and it reads, "Supported by Caldera http://www.caldera.com." Now they want to sue IBM over SMP.
On page 4, you find a Caldera employee contributing to KDE, which isn't the kernel, but it sure is GPL code, so they had to know. It wasn't inadvertent. Because it couldn't be.
And then at the bottom of that page, you'll see a package named trunk/Projects/qemu-0.11.0-rc/linux-user/elfload.c and the notice reads in part, "See documentation of ELF object file format in: http://www.caldera.com/developers/devspecs/gabi41.pdf.
By the way, if you are curious about ELF, what it is, and how it works, this paper, Linux Distributions and Applications Analysis
During Linux Standard Base Development [PDF] by Denis Silakov, is very clear, I think. And it's not the kernel, but here's Caldera's homepage in 2002, advertising that it had released AIM under the GPL. Someone might need to show all this to SCO's experts.
I could go on and on, but I'll let you have the fun of doing your own GPL digging. Unless you are SCO, of course. It probably isn't that much fun for SCOfolk. The GPL is the pebble in SCO's shoe. Or more accurately, it's SCO's Achilles Heel.