A comprehensive database yet awfully slow even after its revamping. If you are doing an exhaustive search this is the search engine to use. The NlightN folks require you to register the first time you visit even though you're not a paying customer. Gives a relevancy score, the file size, a short summary, and a link to similar pages in its results list. Very, very fast, although not as comprehensive.
Searches often result in many irrelevant sites.
M eta S earch E ngines For exhaustive searches, try a metasearch engine. You can also search for software, people, faqs in addition to directories in the Desk Reference Page. Free service from IBM, but perhaps not for long. You'll need to fill out a registration form first, however. With password in hand, you can search the web, UseNet news, the Disclosure SEC database, Hoover's Handbook of Corporations, Comtex business and financial news, the CIA World Factbook, and many newswire services.