| Meta-Search engines search more than one search engine at a time. However, most do not search the most well-used engines. It is usually better to search Google, Yahoo or Ask, one at a time. Berkeley Library: http://www.lib.berkeley.edu/TeachingLib/Guides/Internet/MetaSearch.html/ - an overview of meta-search engines with a list of the best ones and their properties
Dogpile: http://www.dogpile.com/info.dogpl/ - searches up to 9 engines at once Mamma: http://www.mamma.com/powersearch.html - a good meta-search engine that lets you search directories and other engines |