You probably weren’t paying attention when a tiny company called Apple Computer introduced its second product, the Apple II microcomputer, at the West Coast Computer Faire on April 16 and 17, 1977. (I wasn’t.) You may never have owned an Apple II. (I didn’t.) But it’s still easy to get fascinated by the machine and its legacy. (I sure am.) And there are many ways to explore its world — many of which you can do without getting out of the chair you’re sitting in right now, thanks to the Web.