Quote:
Originally Posted by Carpetsmoker
Well, that's like saying that heart surgery is comparatively simple compared to brain surgery...
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Yes but... Remember in those days X11 was not really used (everything was on a serial terminal using termcap running at 9600 baud), the primary graphics tubes were the Tek 4014 and relatives, most printers were simple line printers, and lasers had not yet caught on, and virtual memory was just starting to be used (in Unix, at least). Input from cards was just fading.
I'm not saying the OS internals were trivial, just much simpler than they are now.