• Britannica
    Highly respected encyclopedia in publication since 1768. Features over 100,000 scholarly articles.
    britannica.com - Encyclopedia
  • Catholic Encyclopedia
    10,000 articles on Catholic history, interests, and doctrine.
    newadvent.org - Religion
  • Columbia Encyclopedia (via FactMonster)
    Columbia's online encyclopedia offers 57,000 entries.
    factmonster.com - Encyclopedia
  • Computer Desktop Encyclopedia
    Featuring 20,000 topics and 2,500 images. Search field at bottom of page.
    computerlanguage.com - Computers
  • Credo Reference
    Provides access to encyclopedia entries on thousands of topics.
  • Encyclopedia Mythica
    Premier encyclopedia covering mythology, folklore, and religion.
    pantheon.org - Mythology
  • Encyclopedia of Life
    Database of scientific information on and photographs of known species.
    eol.org - Biology
  • Encyclopedia of Philosophy
    Hundreds of original contributions by philosophy experts and volunteers.
    iep.utm.edu - Philosophy
  • Encyclopedia of Symbols
    Massive collection of signs and ideograms grouped by graphic characteristics.
    symbols.com - Symbols
  • Europeana
    Digital collection of scientific and cultural texts, images, videos, and sounds.
  • How Stuff Works
    Source for easy-to-understand explanations of how things work.
    howstuffworks.com - Science
  • Medline Medical Encyclopedia (by ADAM)
    Diseases, symptoms, injuries, and more with photographs and illustrations.
    medlineplus.gov - Medical
  • Reference.com
    Encyclopedia aggregator. Sources include Columbia Encyclopedia and Wikipedia.
    reference.com - Aggregator
  • Scholarpedia
    Peer-reviewed open-access encyclopedia written by scholars from around the world.
  • Smithsonian
    Online resources from the Smithsonian Institution.
    si.edu - Encyclopedia
  • Stanford Encyclopedia of Philosophy
    Hundreds of refereed encyclopedia entries.
    plato.stanford.edu - Philosophy
  • Who2
    Encyclopedia of more than 3,000 famous people and fictional characters.
    who2.com - Famous People
  • Wikipedia
    Find more than 6,000,000 English entries, written and edited by users.
    wikipedia.org - Encyclopedia
  • World Book
    Traditional encyclopedia in print since 1917. Subscription required.
    worldbook.com - Encyclopedia
  • World Digital Library
    Archive of primary materials from cultures around the world.
    wdl.org - Encyclopedia