While you'd _expect_ to find HP-UX racked in a datacenter, you can also find it on workstations, where its proprietary VUE desktop environment eventually morphed into CDE (which, ironically, I've only ever used on Solaris).
It powered at least one early, pre-laptop-form-factor portable PC, the HP Integral. And you can also find it running on oscilloscopes, logic analyzers, and other test equipment from the 80s and 90s.
I still run 10.20 on my old PARISC box for that reason.
I was instantly jealous of the devs who got the SGI machines, not only did they have color monitors (!) but they got to play networked games with each other (battletanks I think?) at lunchtimes.
We would play that and networked Doom on the chemistry department’s SGI machines. The students trying to do real work were less than enthusiastic.
Egads, was Itanic ever slow for anything not manually optimized to run on it.
* http://miod.online.fr/software/openbsd/stories/boot_hppa.htm...
* Via: http://undeadly.org/cgi?action=article;sid=20251231080327
I remember giving a talk at Chico State University back in the dotcom era, and got a tour of the CS dept; they had various systems running on Solaris, AIX, etc, all with "normal" naming conventions. But anything with HPUX was named after diseases (e.g. Typhus, Malaria) and the feeling in the dept was not subtle.
But in some sense, every high-performance platform back then was an abomination. Whether it was the variant of AIX on an SP2, the weirdly unique Irix versions that seemed to exist in each Origin system at each national lab, or the painfully slow fork/exec on a Cray T3E frontend system when compiling apps.
Irix, Solaris and NeXTSTEP are my favourite UNIXes.
The system was still expensive enough that we had a single tower for the whole class, we would take turns into the system, having prepared our samples on MS-DOS using Turbo C, with mocks for the UNIX system calls and conditional makefiles.