Encyclopedias

• Canadian Encyclopedia Online
  Includes illustrations, photographs, artwork, maps, video clips of Canadian history and culture, audio clips of readings by Canadian authors, and Canadiana quiz.
• Columbia Encyclopedia
  Containing nearly 51,000 entries (marshalling six and one-half million words on a vast range of topics), and with more than 80,000 hypertext cross-references, the current Sixth Edition is among the most complete and up-to-date encyclopediæ ever produced.
• Encarta
  Microsoft's Encarta reference encyclopedia site includes the Encarta World Dictionary, together with a simple atlas and provides access to approximately 12,000 articles with linked images and additional web resources.
• Encyclopedia.com
  Provides users with more than 57,000 frequently updated articles from the Columbia Encyclopedia, Sixth Edition. Each article is enhanced with links to newspaper and magazine articles as well as pictures and maps - all provided by eLibrary. eLibrary is the comprehensive digital archive for information seekers of all ages. You can search across 13 million documents from full-text newspaper and magazine articles, television and radio transcripts, international newswires, classic books, maps, photographs, as well as major works of literature, art and reference books.
• Grove Art Online
  The Grove Art Online provides Web access to the entire text of The Dictionary of Art (1996, 34 vols.) with constant additions of new material and updates to the text, plus extensive image links and all the sophisticated search advantages possible with an online reference source. It is the most comprehensive online reference resource for all aspects of the visual arts worldwide from prehistory to the present day.
• Grove Music Online
  Grove Music Online includes the full text of The New Grove Dictionary of Music and Musicians, second edition and The New Grove Dictionary of Opera.
  In March, 2008, after two years of development, Grove Music Online was relaunched as part of Oxford Music Online, a new gateway for online music resources.
• Knol
  Knol is a Google project that contains authoritative articles on a number of subjects. Authors of all articles are identified. More information is available on the Google Blog.
  
• Wikipedia
  Wikipedia is a multilingual online encyclopedia consisting of over 470,000 articles in English created by more than 16,000 contributors. This is a good source to use for very recent topics.