> If however you had already been experiencing systems like UNIX that ran on everything from mainframes to PDP-11/70's you would not have been quite so surprised.
Back then (R) there wasn't one UNIX, rather everyone had their flavour of it for their kind of machine. I don't think source compatibility became mainstream until the late 80s to 90s, before that it was all ports.
Back then (R) there wasn't one UNIX, rather everyone had their flavour of it for their kind of machine. I don't think source compatibility became mainstream until the late 80s to 90s, before that it was all ports.