is an example of a metasearch engine.
search the databases of several search engines at a time (e.g.,
Looksmart, Gigablast, Lycos, etc).
have little control over search options.
for an overview of your topic on the Web, seeing which search engines
will produce the best results, and for simple searches.
Sometimes metasearch engines won't be very thorough and don't always
include major search engines (like Google).
engines: Dogpile, MetaCrawler, and Search.