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| Wikipedia http://wikipedia.org/ A free encyclopedia with millions of articles contributed collaboratively using Wiki software, in dozens of languages. - (Read more) |
| Bartleby.com http://www.bartleby.com/ Includes the Columbia Encyclopedia, Sixth Edition, dictionaries, and thesauri. - (Read more) |
| Encyclopaedia Britannica Online http://www.britannica.com/ Provides complete text of Encyclopaedia Britannica with search capabilities, related links, and multimedia enhancements. Full text for subscribers only; free trial available. - (Read more) |
| HighBeam Encyclopedia http://www.encyclopedia.com/ Offers articles from the Columbia Encyclopedia and Britannica Concise Encyclopedia. - (Read more) |
| How Stuff Works http://www.howstuffworks.com/ Articles explain how hundreds of things work, from elements of the human body to space-age technology. - (Read more) |
| Information Please http://www.infoplease.com/ Online dictionary, Columbia Encyclopedia, and almanac reference. - (Read more) |
| Knol http://knol.google.com/ Peer-reviewed encyclopedia from Google. Articles are written by named contributors. - (Read more) |
| Simple English Wikipedia http://simple.wikipedia.org/ User-contributed online encyclopedia intended for people whose first language is not English. - (Read more) |
| World Book Encyclopedia http://www.worldbook.com/ Online version of the complete reference work along with dictionary, atlas, links, magazines, historical documents, audio, video, images, and 3D photographs. Requires free temporary registration with option to buy continued access for full articles. - (Read more) |
| Britannica Concise http://concise.britannica.com/ Featuring 28,000 short articles. - (Read more) |
| Classic Encyclopedia http://www.1911encyclopedia.org/ Browsable online version of the 1911 edition of the Encyclopaedia Britannica. - (Read more) |
| Hutchinson Encyclopedia http://encyclopedia.farlex.com/ "A subset of the content (concise set) is provided for free, the access to the rest of the Hutchinson Encyclopedia requires subscription." - (Read more) |
| The Probert Encyclopaedia http://www.probertencyclopaedia.com Reference source with entries covering a broad variety of subjects. - (Read more) |
| Wikinfo http://www.wikinfo.org/ User edited encyclopedia based on Wiki software. Contains articles, information on editing, and a list of differences between this encyclopedia and Wikipedia. - (Read more) |
| Encyberpedia http://www.encyberpedia.com/cyberlinks/links/index.html Electronic encyclopedia with its own content as well as over 10,000 links to the best reference sites on the Internet. - (Read more) |
| Encyclopedia Smithsonian http://www.si.edu/Encyclopedia_SI/ Links to on-line Smithsonian resources and answers to frequently asked questions from A to Z. - (Read more) |
| Online Encyclopedia http://encyclopedia.jrank.org/ Offers articles from on the 11th edition Encyclopedia Britannica, and from the Crystal Reference Encyclopedia. All articles are searchable and alphabetized. - (Read more) |
| Continental Who’s who- who’s who in the world, Business Biographies, Achievers, Business leaders http://www.continentalwhoswho.com Continental who’s who is one of the growing publishers of business biographies, who’s who in the world of Achievers, Business leaders, business networking - (Read more) |
| Nuttall Encyclopædia of General Knowledge http://www.fromoldbooks.org/Wood-NuttallEncyclopaedia/ Approximately 14,000 entries on topics including art, geography, literature, philosophy, religion. Originally published in 1907. - (Read more) |