Provides complete text of Encyclopaedia Britannica with search capabilities, related links, and multimedia enhancements. Free trial available.

Free resource offers more than 57,000 concise articles.

Wikipedia, the free encyclopedia that anyone can edit.

Etexts, focusing on classics and general reference works.

Online home of the Encarta encyclopedia, world atlas, dictionary, thesaurus, multimedia, and homework tools.

On-Line dictionary, Internet encyclopedia, and almanac reference.

User-contributed online encyclopedia intended for people whose first language is not English.

An encyclopedia of plants where you can look a plant up by its common name or its botanical name. It also includes a dictionary of botanical words and information about pests, diseases, and weather.

Offers in-depth information on a variety of subjects and educational activities for children.

Reference source with several hypertext linked entries covering a broad variety of subjects.

Browsable. Based on the eleventh edition of the Encyclopedia Britannica, first published in 1911.

"A subset of the content (concise set) is provided for free, the access to the rest of the Hutchinson Encyclopedia requires subscription."

Articles explain how hundreds of things work, from elements of the human body to space-age technology.

User edited encyclopedia based on Wiki software. Contains articles, information on editing, and a list of differences between this encyclopedia and Wikipedia.

Offers the 11th Edition Encyclopedia Britannica which is now in the public domain. All articles are searchable and alphabetized.

Featuring 28,000 short articles.