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1911 Encyclopedia Britannica
- Offers the 11th Edition Encyclopedia Britannica which is now in the public domain. All articles are searchable and alphabetized.
Bartleby.com
- Etexts, focusing on classics and general reference works.
Britannica Concise
- Featuring 28,000 short articles.
Encyberpedia
- Electronic encyclopedia with its own content as well as over 10,000 links to the best reference sites on the Internet.
Encyclopaedia Britannica
- Provides complete text of Encyclopaedia Britannica with search capabilities, related links, and multimedia enhancements. Free trial available.
Encyclopedia Smithsonian
- Links to on-line Smithsonian resources and answers to frequently asked questions from A to Z.
Encyclopedia.com
- Free resource offers more than 57,000 concise articles.
How Stuff Works
- Articles explain how hundreds of things work, from elements of the human body to space-age technology.
Hutchinson Encyclopedia
- "A subset of the content (concise set) is provided for free, the access to the rest of the Hutchinson Encyclopedia requires subscription."
Information Please
- On-Line dictionary, Internet encyclopedia, and almanac reference.
MSN Encarta Encyclopedia
- Online home of the Encarta encyclopedia, world atlas, dictionary, thesaurus, multimedia, and homework tools.
Nuttall Encyclopædia of General Knowledge
- Approximately 14,000 entries on topics including art, geography, literature, philosophy, religion. Originally published in 1907.
Simple English Wikipedia
- User-contributed online encyclopedia intended for people whose first language is not English.
The LoveToKnow Free Online Encyclopedia
- Browsable. Based on the eleventh edition of the Encyclopedia Britannica, first published in 1911.
The Probert Encyclopaedia
- Reference source with several hypertext linked entries covering a broad variety of subjects.
Wikinfo
- User edited encyclopedia based on Wiki software. Contains articles, information on editing, and a list of differences between this encyclopedia and Wikipedia.
Wikipedia
- A free encyclopedia built collaboratively using Wiki software. (GNU Free Documentation License).
World Book Encyclopedia
- Offers in-depth information on a variety of subjects and educational activities for children.
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