I remember OS/9 fondly. It was my first introduction to a "real" operating system (e.g. not just BASIC and a program loader). Oh, and preemptive multitasking!

I remember OS/9 fondly. It was my first introduction to a "real" operating system (e.g. not just BASIC and a program loader). Oh, and preemptive multitasking! Whoa... :-)