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Wikipedia - http://en.wikipedia.org/wiki/Main_Page
A free encyclopedia built collaboratively using Wiki software. (GNU Free Documentation License) and with over 1,000,000 articles. Note that because articles can be "vandalized," information on Wikipedia is not always accurate. |
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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. |
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Britannica Concise - http://concise.britannica.com/
Featuring 28,000 short articles. |
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HighBeam Encyclopedia - http://www.encyclopedia.com/
Offers articles from the Columbia Encyclopedia and Britannica Concise Encyclopedia. |
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Bartleby.com - http://www.bartleby.com/
Includes the Columbia Encyclopedia, Sixth Edition, dictionaries, and thesauri. |
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Information Please - http://www.infoplease.com/
Online dictionary, Columbia Encyclopedia, and almanac reference. |
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Simple English Wikipedia - http://simple.wikipedia.org/
User-contributed online encyclopedia intended for people whose first language is not English. |
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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Online version of the complete reference work along with dictionary, atlas, links, magazines, historical documents, audio, video, images, and 3D photographs.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. |
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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. |
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Encyclopedia Smithsonian - http://www.si.edu/Encyclopedia_SI/
Links to on-line Smithsonian resources and answers to frequently asked questions from A to Z. |
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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. |
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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." |
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The LoveToKnow Free Online Encyclopedia - http://www.1911encyclopedia.org/
Browsable. Based on the eleventh edition of the Encyclopaedia Britannica, first published in 1911. |
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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. |
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How Stuff Works - http://www.howstuffworks.com/
Articles explain how hundreds of things work, from elements of the human body to space-age technology. |