I always find security measures on old-school systems interesting. They always seem more geared towards keeping semi-honest mischief makers out than serious sec

I always find security measures on old-school systems interesting. They always seem more geared towards keeping semi-honest mischief makers out than serious security. Which makes sense, based on the context of the time I guess. IIRC, the Xerox Pilot OS was purely cooperative multitasking with a single shared address space.