Cluster of search Engine : META SEARCH ENGINE

Meta search engine is considered to the exceptional search engine which basically works by using the search engine algorithm against the request of the surfer or visitor

When so ever any visitor made the requests by putting the keywords to search the terms, then the Meta search engine send the requests to various other search engines and collects the data from them and then only it displays the results using there own algorithm .

Working of Meta search Engine:

Meta search engine creates such kind of database where merge result of data of various search engines of integrated several independent database is collected. Its means Meta search engine is the combination of various search engine results which generates the fundamental database Therefore the difference between the search engine and Meta search engine is that, search engine find the result from web and shows the result while the Meta search engine is the cluster result from various database.

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Can you list out a few Meta search engines?