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Explore the updated online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of articles, biographies, videos, images, and web sites.

Encyclopedia.com – Online dictionary and encyclopedia with pictures, facts, and videos. Get information and homework help with millions of articles in our FREE, online library.

The largest Catholic website in the world

Online educational resources for K-12, college, gradudate school, and distance learning – free online dictionary, thesaurus, encyclopedia, test preparation, homework help and information about K-12 schools, colleges, college admissions, and student ...

Infoplease.com, a free, authoritative, and respected reference for Internet users, provides a comprehensive encyclopedia, almanac, atlas, dictionary, and thesaurus. Infoplease.com contains facts on all subjects including sports, entertainment, techno...

Fact Monster is a free reference site for students, teachers, and parents. Get homework help and find facts on thousands of subjects, including sports, entertainment, geography, history, biography, education, and health.

The premier encyclopedia on mythology, folklore, and religion.

Free online encyclopedia of philosophy, edited by James Fieser and Bradley Dowden. Hosted by the University of Tennessee at Martin.

The National Library of Medicine (NLM), on the campus of NIH in Bethesda, Maryland, is the world

The World Book Store has the encyclopedia, dictionary, atlas, homework help, study aids, and curriculum guides. World Book is publisher of the World Book Encyclopedia.