Read about the WWW Virtual Library. The Digital Librarian The Best Information on The Web was assembled by librarians for student researchers.
Web directories present users with a menu of broad subjects.
Users select the subject category that covers their particular area of interest, then select links to sub-menus closer to their topics until they find links to relevant resources. The Argus Clearinghouse, have the advantage over search engines that they are assembled by teams of editors who specialize in the available subjects. Where keyword searches can sometimes make the user sort through thousands of links, with a very low ratio of results close to what the user is actually looking for, Web directories can often point users to relevant information with just a few menu selections. Though there is no guarantee that every site linked to a Web directory will be accurate and relevant, the odds of finding irrelevant information in a Web directory is much lower than in the results of a Web search engine. The distinction between Web directories and search engines is becoming weaker all the time, however.