Noel Chiappa writes: (This isn't TUHS material, but I can't resist. CC to COFF.) There is also a Chaosnet service to call for the elevator or open the door, so it can be used remotely. The ITS program ESCE uses this service. I suppose there must have been something for the Lisp machines too, maybe even a Super-Hyper-Cokebottle keyboard command.