Emory University's MedWeb includes a long list of health care Societies and Associations . HospitalWeb links to US and International hospitals, the University of Texas at Austin provides access to United States Universities and Community College Web Sites . You can search for anything, including organizations, through searchable indexes such as Alta Vista or Lycos . Instead they periodically download site addresses and additional information into their databases. The search engine then allows you to search the database.
Indexes vary in the way their databases are constructed and in the way the engine works.
For example, some indexes add new sites to their database weekly, others monthly. Search engines differ in their syntax. Fortunately, each searchable index provides directions for how to search it. A searchable index works best if you have a very specific request, and you've taken the trouble to learn how to use the index. Meta-searchers build upon other search indexes.