Here are some sites about search engines and websearching. If you look at any of the above sites, you'll find that each search engine searches in a different way. Some search titles only, while some search entire web pages. Usually they are very nice, because someone has checked out the sites already and arranged them by subject. For a good example, see the one on the Yahoo site.
Most search engines have some kind of web directory attached.
The web is beautiful because anyone can express their opinions or views. This also makes using Internet resources as part of academic research a problem.