ItsaMario says: "Note: I speak from the viewpoint of a young adult. My list of the best computer-related products & concepts includes:1. The Internet itself, as a platform for a wide variety of both information and services- both what's on it now and what will be on it in the future. 2. The GUI concept, whoever it is that deserves credit for it. 3. The Apple II, for igniting the personal computer revolution when companies like IBM had no idea why regular people would want a computer in their home. With those in mind, my list of honorable mentions is the following: Google Web search, Mac OS X, DNS, Napster (never used it, but it started the online music revolution), Podcasts As for the best desktop computing program of all, I'd have to say it's Quicksilver."