Meta Search Engines
Last updated Apr. 04, 2006.
Multiple Search Engines, Meta Search Engines, or Metacrawlers?
Whatever you call them, meta search engines query several other Web search engine databases in parallel and then combine the results in one list. Because they do not need to create their own databases, there are many meta search engines out there. Several of the best known are listed below.
There are many variations of the meta search approach:
Note the Problems with using multiple search engines before relying on their results.
Problems: These multiple search engines are a commendable effort; however, the problems still outweigh their benefits. All have significant limitations as a comprehensive search tool. They are subject to time outs, when search processing takes too long. Since most only retrieve the top 10-50 hits from each search engine, the total number of hits retrieved may be considerably less than found by doing a direct search on one of the search engines. Advanced search features on individual search engines are not usually available. Phrase and Boolean searching may not be properly processed or available. Often they exclude one of the major databases such as Google or Ask.
See several of my old columns in ONLINE for more information:
Defunct Meta-Search Engines
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