Thirty years ago, Apple introduced the Macintosh, and we all learned why 1984 wasn't going to be like 1984. A lot has changed in 30 years, and yet even in as fast-moving a field as technology, Apple and the Mac are still here. A time traveler from 1984, fresh from Steve Jobs's introduction of the original Mac, would probably be able to point at one of today's iMacs and identify it as the logical evolution of the original.