I recently StumbledUpon The World of Programming chart (found at Smashing Magazine’s site, which is a really good resource in general). It’s a quick and interesting graphic that introduces some of the key people, technologies, and theories in the world of programming, going back to 1843 (yes!). Smashing Magazine has this thread on the design of the poster, that’s also worth checking out. I, for one, now know where the Ada programming language got its name…
Unlike many things I find online, I actually found the comments to the design post to be more or less worthless. Largely the comments are either: A) What about person or technology X? or B) Look how smart I am. Still, the post itself is worth a quick read.