Scott McCloud worked with the Google Chrome development team to create a comic that explains how Chrome works.
(Chrome is their new web browser. The beta is Windows only at the moment.)
It’s probably one of the best visual presentations of sandboxing, multithreaded applications, and other similar software architecture features I’ve ever seen, and it’s worth your time to read — if not because you’re interested in new web browsers, than because you’re interested in communicating complex ideas simply.