A search engine is a tool that finds Web pages in online databases based on terms and criteria specified by the user. 
 
 
 

Explanation:

A search engine sends programs out onto the Web to collect the text of Web pages.  The text is stored in the search engine's database.  When you use a search engine, your word or phrase is matched with the text in the search engine's database.  Some examples of search engines are Yahoo, Alta Vista, and Yahooligans.
 

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Look up "Search Engine" in the TechEncyclopedia.

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