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USD Information Literacy Lessons: Page 5

The broad focus of these lessons is understanding sources of information, including examples that can help you learn how to access information sources at USD. Each lesson is dedicated to a specific element of information competency.

Overview of Online Materials: The Resources

Here are some statistics to keep in mind about information on the Web:

  • More than 7.5 million new pages go onto the Web every day.
  • The Web contains an estimated 2.5 billion documents.
  • The average life span of a URL (i.e. Web address) is 44 days.*
  • There are more than 2,500 search engines/directories on the Internet.*
  • The largest search engine (AltaVista) has access to between 14%-16% of the URLs at any one time.
  • The largest domain is .com, comprising 35.3% of all Internet hosts.
  • Not everything in print is available online, especially if it was created before 1990.
    *Fowles, Charlotte.  "Evaluating Web Resources."  Vermillion, SD: I.D. Weeks Library, 2000.


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