This single 650MB CD IMO it is one of the most complete distributions in terms of what it includes and you can do with it. It includes a complete desktop environment (KDE 1), development tools (with an IDE), graphics editors, productivity tools, typesetting tools (TeX, LaTeX, Groff), databases, clients for mail, irc, web, etc, media players, a bunch of games and - most importantly - documentation for pretty much everything accessible right away from the panel at the bottom (...although ironically while there is also a "getting started with linux" document that describes the basics, for some reason it is not linked and not even compiled... you need to already know the console and docbook tools to compile it and read it :-P).
And on that machine is still very fast and usable. I tried it at some point a while ago and after playing with it for a while i started reading some of the included stuff and after a while i forgot i was in an emulated environment since everything was responsive. And this is, btw, exactly how i remembered it - this distribution was the first Linux distribution i ever used on my PC in 1999 (which was a 200MHz Pentium MMX with 32MB of RAM).
(as a sidenote, yes this is the same Caldera that renamed themselves to SCO and made the infamous lawsuites, but this distro was made before that time)
[0] https://archive.org/details/OpenLinux2.3CD [1] https://github.com/86Box/86Box