Another one, fairly common in late Soviet and very early 1990s Estonia (pronounced "Yuku"): https://et.wikipedia.org/wiki/Juku_(arvuti)
It was often ridiculed by posh youngsters who already had their hands on a 386, though. :)
It was often ridiculed by posh youngsters who already had their hands on a 386, though. :)
I think our first 386 also had a physical lock, but since I was a kid back then, I don't remember having ever seen anybody actually using a lock like this anywhere. But ours was a tiny province town in almost-rural Estonia, so there were no real industry-level secrets anyhow.