Early 80's database still alive
The oldest tech I'm still using and maintaining is a database app that I wrote in the early 80s, but the data in the database goes all the way back to 1971. In the earliest days it was actually a list updated with a typewriter. (I still had a typewriter until 1989.) I use it about 3 times per week, booting up an old multi-boot machine with a 20-MB DOS partition. I was never able to set up an emulator that could support the FCBs properly, but it's become a concern. It's an ancient ThinkPad, and built like a tank, but how long can it keep going?
Pretty sure that there are very few bugs in the code, but I sometimes edit it to add functionality. I remember adding a rolling window for the Year 2000 problem, and there was a decade tweak around 2011, too. However the main recent modification was a new statistical function that was added about 3 or 5 years back. Major problems because I had forgotten about the internal editor, so when I used an external editor the handling of the CRLFs was quite different.
But my actual interest in the story was whether this explains the anomalous location and velocity data. I read about it in a book called "13 Things That Don't Make Sense". Can't find any current references to those anomalies.