I think the oldest I’ve ever used albeit bot owned was a Acorn II, which was at school. I think it was from some old initiative from the 80s to get computers in schools?

Had some weird games on it, I’m in wales so it had a game called POD where you tell a anthropomorphic tomato things to do in welsh and it would play a short animation of it doing thus.

Kids being kids we were only interested in exploding the poor tomatoman.

It also ran lemmings.

I think it was all running off floppy disks, this is like 25 years ago