RFC2145 - Use and Interpretation of HTTP Version Numbers - This document tries to clarify the intentions of the specs for HTTP versions 1.0 and 1.1. The aim is to avoid confusion regarding the use and interpretation of each. - http://tools.ietf.org/html/rfc2145
RFC2616 - HTTP/1.1 Specification - HTTP/1.1 is the latest specification from the World Wide Web Consortium. - http://tools.ietf.org/html/rfc2616
RFC1945 - HTTP/1.0 Specification - Despite the improvements made in version 1.1, HTTP/1.0 is still widely used around the Internet. - http://tools.ietf.org/html/rfc1945
View HTML Source Code - Online tool for view a web pages HTML source code and HTTP server headers. See page redirections and cookies and other extra information. - http://www.viewhtml.com
Clarifying the Fundamentals of HTTP - Analysis of HTTP/1.1, identification of its failures, and suggestions for improvement. By Jeffrey C. Mogul of Compaq Research. - http://www2002.org/CDROM/refereed/444/
An Analysis of HTTP Performance - Paper by Joe Touch, John Heidemann, and Katia Obraczka of the USC/Information Sciences Institute. - http://www.isi.edu/lsam/publications/http-perf/
Cookies - HTTP - Information on cookies including some background info, articles, technical specifications, and what consumer groups think. - http://www.rajivshah.com/Case_Studies/Cookies/CookiesLinks.html
PEP - W3C working draft of an Extension Mechanism for HTTP. - http://www.w3.org/TR/WD-http-pep
rproxy -- rsync in http - HTTP extensions to allow download of only the changes between cached and current versions of a page, - http://rproxy.samba.org/
W3C Hypertext Transfer Protocol Overview - This is the overview materials related to the W3C HTTP activity, one of the W3C Architecture domain activities. HTTP has been in use by the World Wide Web since 1990 and its use has increased steadily over the years, mainly because it has proven useful as - http://www.w3.org/Protocols/