5 ms·
IBM had OS/360 in 1966, about a decade before CP/M. Not sure where "OS" first appeared but it was before that. Related: early OSes were not timesharing systems
by gamache 4y ago
IBM had OS/360 in 1966, about a decade before CP/M. Not sure where "OS" first appeared but it was before that.
Related: early OSes were not timesharing systems. They were batch oriented - you submit your stack of punch cards to the operator, and pick up your output later once they've had a chance to run it.