Apple's Copland Project: An OS for the Common Man
Copland was Apple's next OS iteration to come after Mac OS 7.5, featuring preemptive multitasking, a new finder and even a spotlight-like realtime indexing system. As we all know, Copland never made it out of beta and Apple bought next instead. Still it's interesting to read about what could have been. Lowendmac has a nice overview.