Internet Searching Search Engines: Search engines are "engines" or "robots" that crawl the web looking for web sites that contain the keywords entered by the user. Google AlltheWeb AltaVista Excite Search Directories: Search directories are databases arranged by subject with links to websites. Yahoo Metasearch engines: Metasearch engines check several search engines and directories simultaneously with the user's keywords. Dogpile Metacrawler Vivisimo Mamma