BBCB
The hospital I used to work in had some older patient records on microfilm and microfiche, with the database to look them up held on a BBCB. Probably not run continuously since the '80s, but it was usually left on even when not in use so it must have had a fairly impressive uptime. As far as I know it's still there, since it would cost money to have someone figure out how to transfer the database and hospitals aren't exactly known for their ample funding levels these days.
Biting the hand that feeds IT
