• Answers.com
  Online Dictionary, Encyclopedia and much more
  Answers.com: Wiki Q&A combined with free online dictionary, thesaurus, and encyclopedias. Ask questions, get answers.
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• Howstuffworks TV Buying Guide
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• The Library of Congress
  
  The Library of Congress. The Library of Congress is the nation's oldest federal cultural institution, and it serves as the research arm of Congress. It is also the largest library in the world, with more than 120 million items. The collections include books, sound recordings, motion pictures, photographs, maps, and manuscripts.
  american americas catalog congress copyright digital exhibitions gateway global library memory national nations office p thomas
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• World Wide Metric
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