Meta search engines

Everyone knows how difficult to search information in websites, a keyword get some results in Google search engine is differing from yahoo search engine results. if we go on with both search engines its a panic. so now Meta Search engines are ready to help this time.

What is Meta Search Engine:
A meta-search engine is a search engine that sends user requests to several other search engines and/or databases and returns the results from each one. Meta search enables users to enter search criteria once and access several search engines simultaneously. Since it is hard to catalogue the entire web, the idea is that by searching multiple search engines you are able to search more of the web in less time and do it with only one click. The ease of use and high probability of finding the desired page(s) make metasearch engines popular with those who are willing to weed through the lists of irrelevant ‘matches’. Another use is to get at least some results when no result had been obtained with traditional search engines.

Meta search engines create what is known as a virtual database. They do not compile a physical database or catalogue of the web. Instead, they take a user’s request, pass it to several other heterogeneous databases and then compile the results in a homogeneous manner based on a specific algorithm.

here some Meta search engines:

http://www.dogpile.com

http://www.metacrawler.com

http://www.askjeeves.com

http://www.infind.com

http://www.profusion.com

http://www.savvysearch.com

http://www.mamma.com

http://www.thebighub.com