Encyclopedias

This free resource offers more than 50,000 frequently updated articles from the Columbia Encyclopedia. Articles are enhanced with links to newspaper and magazine articles as well as pictures and maps. - [Read more]

Offers the Encyclopedia Britannica 11th Edition, which is now in the public domain. All articles are searchable and alphabetized. - [Read more]

Online version of the complete reference work plus a dictionary, atlas, historical documents, and multimedia enhancements. Site content is available for use on a subscription basis. - [Read more]

1600 articles about 2500 western symbols. Graphic index and word index. - [Read more]

Explains terms and principles of laser physics and technology. Contains 529 technical articles. - [Read more]

Features a collection of online reference works, including a Columbia Encyclopedia edition as well as dictionaries, thesauri, and classic literature. Provides students, researchers, and intellectually curious individuals with access to books and reference information on the web. - [Read more]

Provides complete text of the Encyclopaedia Britannica with search capabilities, related links, and multimedia enhancements. Abbreviated articles are available free, while the full text is available to subscribers. - [Read more]

Features 28,000 short articles from the editors of Encylopedia Britannica. - [Read more]

Online education resources from the Smithsonian Institute. Find answers to frequently asked questions from A to Z. - [Read more]

A free encyclopedia which is being developed and written collaboratively using Wiki software. The site contains over 1,000,000 articles, many of which are well-researched but some of which are inaccurate. - [Read more]

Includes many articles which explain how a wide variety of natural processes and technological products work. - [Read more]

Users can browse a subset of the Hutchinson Encyclopedia at no charge. Access to the full 75,000 article content requires a subscription. - [Read more]

Online dictionary, encyclopedia, and much more. Most of the answers to questions come from Wikipedia so they cannot be considered authoritative without verification. - [Read more]

Produced by the American-Israeli Cooperative Enterprise. This online source provides information about topics related to Jewish history and more current topics. Also contains bibliographies and lists of relevant websites. - [Read more]

The Encyclopedia, a contains brief, detailed information about 193 countries, plus information about the U.N., U.N. Related Agencies, and World Leaders. Searchable by continent and country, or by agency or name. - [Read more]