Hyper Text Transport Protocol.
More Acronym's. Sometimes called "How To Transfer Porn". Simple protocol, we're currently up to HTTP/1.1, a lot of people love doing all sorts of unnecessary things over HTTP.
there is an RFC on HTTP, but I forget which one.
HTTP uses port 80.
The original proposal for what became the WorldWideWeb: http://www.w3.org/History/1989/proposal.html
37 pages link to HTTP: