What are Metacrawlers and Metasearch Engines

Metacrawlers don't crawl the world wide web themselves,instead, they allow searches to be sent to several search engines all at once and then compile all the results together onto one page.

Below are some of the important Metacrawlers:

* Mamma - http://www.mamma.com
* SurfWax - http://www.surfwax.com
* Kartoo - http://www.kartoo.com
* Vivisimo - http://vivisimo.com
* Dogpile - http://www.dogpile.com