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The word directory is used in computing and telephony meaning a repository or database of information. A directory, as opposed to a conventional database, is heavily optimized for reading, with the assumption that data updates are very rare compared to data reads. Commonly, a directory supports search and browsing in addition to simple lookups.A website which offer access to a categorized listing of other websites optimized for lookup, search, or browsing is a directory, a web directory. The Open Directory Project is an example of a web directory.Directory techology is often used in white page applications and network information services.
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