Others are Meta search engines like
metacrawler and MSN search that fetch results from other search engines.
One of her many projects was helping to develop the first
metacrawler search engine for navigating the web (before there was Google).
MetaCrawler and Dogpile are the examples of Meta search engines.
The population was including five engine search; Ask, Bing, Google, Lycos, Yahoo and four meta search engines of Excite, Dogpile, Mamma and
Metacrawler. 30 keywords were selected by medical experts and were searched in these engines and meta search engine.
It is a metasearch engine or
metacrawler, which means it searches using several search engines for more complete coverage, which is discussed later in this article.
Combining the results from multiple search engines can greatly improve the coverage, as was done with meta search engine such as
MetaCrawler (www.metacrawler.com).
MetaCrawler integration search engine.Library Works and Studies 2002 (3) 46~47
It also competes with Infospace s Dogpile, WebCrawler and
MetaCrawler in metasearch, or returning results from multiple search engines.