The Invisible Web
Susan DiRenzo & Nancy Pitre
The University of Akron

The Invisible Web

The Invisible Web is a collection of "invisible" or "hidden" content and other information resources containing high-quality information that cannot be identified, indexed and/or located by traditional Internet search engines or directories. Content on the Invisible Web consists of data stored in searchable databases, PDF files, Flash Files, calculators, and other interactive information resources.

In recent years, numerous web sites, or gateways to the Invisible Web have been created and have become a useful supplement to traditional and popular Internet search engines and directories. These sites are created by humans, sometimes contain reviews of selected sites, and usually provide either a searchable and/or a browsable guide to invisible content available on the Web.

Although these sites can help retrieve web content not generally indexed by traditional and popular Internet search engines and directories, there are several issues to take into consideration. Since searching the Invisible Web is a new concept, many of these sites are still in the developmental stage. Not all sites are user friendly and easy to use. Some search interfaces are confusing and offer users too many options to choose from. Some sites have included links to numerous commercial sites that contain the same information that is indexed and located by traditional and popular Internet search engines and directories. Thus, the distinction between "visible" and "invisible" content is blurred, and as a result, these sites may be of less value to the average user. Finally, since these sites are human creations, there is a possibility of bias and irregular subject coverage.

Invisible Web Sites

About .com Invisible Web - Hidden Searchable Sites
http://websearch.about.com/internet/websearch/cs/invisibleweb1/
Direct Search
http://gwis2.circ.gwu.edu/~gprice/direct.htm
FedWorld
http://www.fedworld.com
Infomine
http://infomine.ucr.edu/search.phtml
Internets Search Engines and News
http://www.internets.com/
InvisibleWeb.com
http://invisibleweb.com
Librarians' Index to the Internet
http://www.lii.org/
LibrarySpot
http://www.libraryspot.com/
Lycos Invisible Web Catalog - Searchable Databases
http://dir.lycos.com/Reference/Searchable_Databases
WebData.com
http://www.webdata.com/webdata.htm

Selected Readings

Cone, E. (1998). Research Security - Citizen 1 Finds There's a Market in Helping Businesses Uncover the Invisible Web&. Information Week. n688, p. 94.

Dahn, M. (2000). Spotlight on the Invisible Web. Online. July/August 2000, p. 57-62.

Lycos Aligns with IntelliSeek to Reveal the Invisible Web Catalog - the Largest Collection of Searchable Databases. Business Wire. June 7, 1999, p. 44.

McCarthy, S. (1999). The Search is on for Ways to Navigate Invisible Web Sites. Government Computer News. 18 (4), p. 37.


Updated: 19 April 2001
Contact: Susan DiRenzo & Nancy Pitre
©The University of Akron, 2001