CD-roms and disc media don't change for years, though. Popular apps change their interfaces every few months, it seems, and don't come with a manual. Learning the basics of a computer is more or less once-and-done, whereas keeping up with idiot designers is a constant task and a huge pain in the ass even when you're trying. And I say all this as a college student, which makes me one of the prime demographics for most of these apps.