A search of the Deep Web is often necessary when looking for highly specialized directories or database-driven Web sites. The contents of the Deep Web-also known as the Invisible Web-is not easily accessible through conventional search techniques because they are not indexed by popular search engines like Google, Yahoo!, MSN Search and Ask.com.
For more information on searching the Deep Web, visit the State University of New York's Deep Web tutorial on the University at Albany Website. Once entered, the Deep Web is searched in the same way as a simple or an advanced search. In other words it is keyword driven. Here is a short list of Deep Web search sites:
In the following demonstration the researcher uses Infomine to search the Deep Web for electronic journals related to the field of mechanical engineering. Feel free to click on Infomine and become the researcher yourself.