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Usenet, or Netnews, is a world-wide distributed discussion system. Traditional access to newsgroups, or discussion fora, requires newsreader software and access to a newsserver. Many ISPs provide access to a newsserver as part of their service package. Sites in this category are for searching Usenet newsgroups.
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Current Browsers and the User Agent Accessibility Guidelines 1.0
http://www.webstandards.org/learn/articles/current-browsers-uaag10/