Yes...our main program for a large hospital was an IBM mainframe and the application was written in MUMPS.
We were way ahead of our time with an integrated electronic order entry, scheduling, billing...no more five part paper requisitions...send the goldenrod copy here, send the pink copy there, etc.
But we reached block obsolescence in the mid-nineties, but...the money to move to a new massive system was daunting.
OK, you’re way outside my realm of knowledge, never even heard of MUMPS.
Think I had it when I was a kid though... :-)
But for the typical windows crowd, Y2K was a nothingburger. We proved it long before it got there, we had to know what to expect. Whether it was a stand alone home computer, or a small LAN, Windows didn’t seem to even notice the date change. We just advised people to try and not be online at midnight, that was the one thing we had no way of testing.
We didn’t even get any of the Y2K patches Microsludge put out...with all the numerous OS installs we did we weren’t about to go through that hassle every time, even though at that time you could still download Windows updates and save to a floppy or whatever. We kept most of them on the shop server. I still have a CD somewhere with a bunch of updates on it including the XP service pack 2, some fixes for malware and such produced around that time, drivers for tons of hardware on cd...I archived everything I had to download.
I knew it wouldn’t be a problem on Dec 31, I was at an airbase across the Potomac from the White House, and 2 small, single engine planes were flying around 5 minutes before midnight in the White House area...they could only be government planes, that’s restricted airspace, and they absolutely would NOT allow them off the ground if anything serious was expected. Probably surveillance planes but I never found out. My brother had just been transferred there. We went out to watch the fireworks just before midnight, there these 2 planes were, just tooling around...