This document attempts to be a high-level view of the architecture of the World Wide Web. It is not a definitive complete explanation, but it tries to enumerate the architectural decisions which have been made, show how they are related, and give references to more detailed material for those interested. Necessarily, from 50,000 feet, large things seem to get a small mention. It is architecture, then, in the sense of how things hopefully will fit together. I have resisted the urge, and reques...