Encyclopedia Britannica Online http://www.britannica.com/
MSN Encarta http://encarta.msn.com/
Columbia Encyclopedia http://www.bartleby.com/65/
Encyclopedia Mythica http://www.pantheon.org/
Artcyclopedia http://www.artcyclopedia.com/
Internet Encyclopedia of Philosophy http://www.iep.utm.edu/
Encyclopedia Smithsonian http://www.si.edu/resource/faq/start.htm
Stanford Encyclopedia of Philosophy http://plato.stanford.edu/
Medical Encyclopedia http://www.nlm.nih.gov/medlineplus/encyclopedia.html
Encyclopedia of Psychology http://www.psychology.org/
Math World http://mathworld.wolfram.com/
Computer & Internet Definitions http://www.webopedia.com/
Encyclopedia Astronautica http://www.astronautix.com/
Great Books Online Encyclopedia http://www.bartleby.com/
Western Symbols and Signs http://www.symbols.com/
Information About Countries http://www.countryreports.org/
Encyclopedia of the Orient http://i-cias.com/e.o/
Literary Encyclopedia http://www.litencyc.com/
Encyclopedia of Life Sciences http://www.els.net/els/public/home/default.asp?sessionid=public
Internet Mental Health http://www.mentalhealth.com/
African Music Encyclopedia http://africanmusic.org/
Physics Encyclopedia http://members.tripod.com/~IgorIvanov/physics/
Extrasolar Planets Encyclopedia http://vo.obspm.fr/exoplanetes/encyclo/encycl.html
Prime Mathematics Encyclopedia http://www.mathacademy.com/pr/prime/index.asp
Storm Encyclopedia http://www.weather.com/encyclopedia/
Automotive Encyclopedia http://autopedia.com/