The Fuzzball https://www.eecis.udel.edu/~mills/database/papers/fuzz.pdf Ah. PDP 11 running RT11 (the RT stands for real-time, you know, and it was!). Bigger and much heavier than a breadbox it had a lot of power. Oh, wait, I mean it *used* a lot of power. And you could modify it with a soldering iron and hammer. :-) -Brooks