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, technology, education, world news, and united states government and history.

Answers.com - the ultimate answer engine, with quick accurate dictionary, thesaurus, encyclopedia, bios, tech terms, news, sports, weather, and much more.

Columbia Encyclopedia, Sixth Edition, 2001-07 at Bartleby.com: the most up-to-date encyclopedia available on the web

Project Galactic Guide is a collaborative Internet attempt at creating an electronic reference meant to guide and misguide its readers in matters of life, death, and finding a parking space anywhere in the Universe.

The BambooWeb Online Dictionary and Encyclopedia provides thousands of articles about virtually every topic you could think of.

EOLSS body of knowledge,The EOLSS body of knowledge is an integrated compendium of sixteen component encyclopedias .It attempts to forge pathways between disciplines in order to show their interdependence and helps foster the transdisciplinary aspects of the relationship between nature and human society.

The Hippie Dictionary: A Cultural Encyclopedia of the 1960s and 1970s. Civil rights, anti-war, music, love & peace.

The premier encyclopedia on mythology, folklore, and religion.

The Encyclopedia of Psychology is a collection of links to many areas of psychology. Our intent is to offer the best available sites organized to further the understanding of Psychology as a science.

Mathematics resources for students and instructors.