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A search engine is a program designed to help
find files stored on a computer, for example a public server on the World Wide Web, or one's own computer. The search engine allows one to ask for
media content meeting specific criteria (typically those containing a given word or phrase) and retrieving a list of files that match those criteria. A search engine often uses a previously made, and
regularly updated index to look for files after the user has entered search criteria.
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