In conversation, I heard that Oracle had a version of their database that historically ran on the VAX system:
https://en.m.wikipedia.org/wiki/Oracle_Rdb
I've never heard of this before (and have tried do a decent bit of historical research in general). Would be interesting if anyone else had practical experience or historical knowledge about it? How does it compare to what is modern Oracle?
I try to explore a lot of historical hardware and operating systems in my spare time. (You know when you are back for the holidays you get to hear all kinds of great old stories...)
https://en.wikipedia.org/wiki/Oracle_Rdb
https://en.wikipedia.org/wiki/VAX_9000
DEC was in the process of slowly imploding. The lead OS engineer, Dave Cutler, had already left to go to Microsoft with his team, where he took the skeletal outline "OS/2 3" project to make a portable OS/2, and turned it into OS/2 NT and thence Windows NT.
[edit] I don't remember using Oracle itself being massively different, I think it was probably v7.3.