This site provides an overview of the features and mechanisms of the most popular search engines. Search Engines Quick Guide Maintained by Carole Leita for the InFoPeople Project, California State Library. The main features of 6 search engines are summarised for convenient quick reference. A subject directory is a service that offers a collection of links to web sites, submitted by site creators or evaluators and organized into subject categories. Directory services use selection criteria for choosing web sites, though the criteria varies among services.
Most directories also offer a keyword search facility to query the database.
The value of subject directories is that you can browse by pre-determined subject folders and that web sites have been classified by people rather than computers. Subject directory Comments Yahoo Yahoo provides access to a wide range of information through their subject headings BUBL Link BUBL provides access to selected Internet resources covering all academic subject areas. Meta search engines simultaneously search multiple search engines. They are also referred to as parallel search engines, multithreaded search engines, or or mega search engines. Tutorials Many tutorials on using the Internet are available on the web.