RIP, Steve.Regarding the "Knowledge Navigator," I read a bit about that concept in the book Infinite Loop (a history of Apple and its founders through 1999). It was apparently John Sculley's pet project, occurring shortly after Steve Jobs was forced out of the company. The book credited the Knowledge Navigator for sidetracking the company at that time, and was used as an example of Apple's poor management in the time when Jobs wasn't there. It was a cool idea at the time, certainly, but it was foolish to devote any resources in 1987 to making it into a functioning product. The basic technology was nowhere near where it needed to be to make such a device possible.