1Up Info – a portal with a difference.
CIA World Factbook – current, in-depth data on every country in the world.
Bushido Martial Arts Encyclopedia – information on karate, judo, kung fu, aikido, kobudo, and gatka, the deadly physical discipline of Northern India. Scan a few illustrated examples and pick up some historical background.
The Canadian Encyclopedia – Site provides the full text of the Canadian Encyclopedia, containing the efforts of over 3800 contributors from all parts of Canada.
Columbia 2001 Encyclopedia – Full Sixth Edition Online
Country Reports – Country information from around the world.
Encarta – This online version of Microsoft’s encyclopedia contains search engines and browsable indexes to help users learn and perform online research. Research tools include the encyclopedia, a dictionary, and an atlas.
Encyclopedia Astronautica – information about space exploration
Encyclopedia of British History – “A comprehensive encyclopaedia being produced for the National Grid of Learning and a completely free resource for all students of British history. The encyclopaedia currently contains over 1,000 entries and is an attempt to show the history of Britain through the eyes of people from all levels of society.”
Encyclopedia of Education Statistics – The Encyclopedia of Education Stats brings together data from several National Center for Education Statistics sources including: The Condition of Education, The Digest of Education Statistics, and Projections of Education Statistics.
Encyclopedia of the Orient – easy to use, fast growing, and free of charge; with photos and sound; specializes in North Africa and the Middle East.
Encyclopedia of Plants – Resource for all of your gardening needs. It provides information regarding the general description of the plants, the various methods of cultivation, such as indoor or outdoor planting, soil and temperature requirements, pruning, and other important details, the means of propagation (seeds, cuttings, division, etc.), and the different varieties and hybrids.
Encyclopedia of Psychology – over 2000 psychology related links.
Encyclopedia of Technology – more than 20,000 IT terms.
Encyclopedia of Television – The Encyclopedia of Television includes more than 1,000 original essays from more than 250 contributors and examines specific programs and people, historic moments and trends, major policy disputes and such topics as violence, tabloid television and the quiz show scandal.
Encyclopedia Titanica – This on line resource is for anyone interested in the Titanic. You can read over 2,100 individual passenger and crew biographies, browse the regularly updated passenger and crew listings, read exclusive articles by leading historians or join in discussions about Titanic research in a message board.
EncycloZine – Describing itself as a hybrid of a portal and a “concise encyclopedia,” Encyclozine features encyclopedia-like entries to over 100 topics and quality links to related sites.
Information Please – from the print reference database, offering millions of useful and interesting facts on a wide range of topics online. Also includes a dictionary and encyclopedia.
Jewish Encyclopedia – This website contains the complete contents of the 12-volume Jewish Encyclopedia, which was originally published between 1901-1906. The Jewish Encyclopedia, which recently became part of the public domain, contains over 15,000 articles and illustrations.
Legal Encyclopedia – Plain-English articles on a variety of legal topics from Nolo.com.
Literary Encyclopedia and Literary Dictionary – The aim of The Literary Encyclopedia and Literary Dictionary is to provide profiles of the lives and works of literary authors whose works are valued in the English language, and to do so within an electronic publication which will enable readers to explore literary history as never before.
Mathematics Encyclopedia – What is an abacus? What did Euclid discover? Find answers to these and other questions with this browsable math encyclopedia.
MIT Encyclopedia of Cognitive Sciences, The – organizes the cross-disciplinary topics of cognitive and brain sciences under the six domains of computational intelligence; culture, cognition, and evolution; linguistics and language; neuroscience; philosophy; and psychology.
PC Webopaedia – “The #1 online encyclopedia and search engine dedicated to computer technology”
Regulatory Fish Encyclopedia – US FDA / Center for Food Safety and Applied Nutrition
Spices & Herbs Encylopedia – information on spices from allspice to vanilla.
Symbols.com – world’s largest online encyclopedia of over 2500 graphic symbols
Virus Encyclopedia – “The entries are sorted by the first letter of the virus name, plus a page for virus names which are numerical (#). It is important to note that many viruses have several aliases. If you are looking for information on a virus, it may be in here under a different name.”
WWW news.answers archive – The Usenet newsgroup news.answers is a repository for periodic informational postings (also called Frequently Asked Questions postings, or FAQs) from other newsgroups
Wikipedia -Free, open content encyclopedia project with over 100,000 articles.
World Encyclopedia – site answers your highest peak questions (including the high point of each state in the U.S.). It has an index of geographic regions and mountain ranges and another of individual peaks and volcanoes. Visual indexing is offered through clickable relief maps.