A HYBRID search engine is part TRUE SEARCH ENGINE and part WEB DIRECTORY. HYBRID search engines use "spider" computers to create their databases. People also maintain a directory so that Website producers can submit their sites for review and possible inclusion.
These days, most search engines are HYBRIDS.
Take Yahoo!® for example. Yahoo!® has a traditional search engine AND a Web Directory.
Click here if you want to open a new browser window to Yahoo!®. You can also do a "Bookmark" in Netscape® or add it to your "Favorites" in Internet Explorer® if you want to go back to it later: http://search.yahoo.com/).