Oldest gear that's still in use?
We have a professor here (I work at a University) that maintains a PDP-8/E to use for something or other having to do with his research. Apparently some program he wrote in the 70s/80s couldn't possibly be ported to anything even remotely modern </sarcasm>, but since he's essentially self contained we let him do as he pleases.
Anyway, I'm curious what ancient computers other people might still be actually using.