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At any given time several distinct crawls are running, some for months, and some every day or longer.
View the web archive through the Wayback Machine.
Wide crawls of the Internet conducted by Internet Archive. Access to content is restricted. Please visit the Wayback Machine to explore archived web sites.
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The Wayback Machine - https://web.archive.org/web/20130201062805/http://www.searchengineoptimising.com/glossary/joomla-glossary/front-end28sitefrontend29
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