Google, now a household name associated with ‘web search’, remains the top search engine on the internet followed by a distant second, Yahoo. The word ‘google’ is so popular that it even enjoys a place in the Merriam Webster dictionary meaning “to use the Google search engine to retrieve information on the internet.”
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http://www.labnol.org/internet/search/special-search-engines-not-google-or-yahoo/1601/