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The Microsoft Support home page is your support portal for Microsoft products. Download updates and find top issues, error messages, and troubleshooting tips for Windows XP, Windows Vista, Windows 7, Office 2010, the 2007 Microsoft Office system, and...

Thousands of file extensions with detailed information about each file type, including a list of programs that open the files.

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WikiAnswers: Questions and Answers from the Community

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MIT is devoted to the advancement of knowledge and education of students in areas that contribute to or prosper in an environment of science and technology.

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WorldWideScience.org is a global science gateway

Scientific Literature Digital Library incorporating autonomous citation indexing, awareness and tracking, citation context, related document retrieval, similar document identification, citation graph analysis, and query-sensitive document summaries. ...