-allow the user to enter keywords that are run against a database. Based
on a combination of criteria (established by the user and/or the search
engine), the search engine retrieves WWW documents from its database
that match the keywords entered by the searcher.
- best used to locate a specific piece of information, such as a known
document, an image, or a computer program, rather than a general subject.
e.g. AltaVista (http://www.altavista.com)
Multi-threaded search engines
e.g. Metacrawler (http://www.metacrawler.com)
Subject-specific search engines
e.g. Beaucoup! (http://www.beaucoup.com)
Search Engine Colossus