You look up your subject heading and browse the list of resources provided there. Coverage will be more selective than for search engines but resources will have been chosen for inclusion by human intervention rather than extracted mechanically from the whole of the Internet. Categorised collections can take a general approach, aiming to cover all subjects or can limit themselves to certain subject areas. Examples of both types are listed below. The collection can be browsed in Dewey number order, looked up alphabetically by subject or searched for specific text.
Coverage is academic rather than general.
Resources can be searched for specific text or browsed alphabetically by subject heading. Coverage is academic rather than general. Yahoo also offers regional coverage. There is a wide range of guides to Internet resources in specific subject areas. These are usually compiled by librarians and subject specialists and bear similarities to printed subject bibliographies.