This month we'll focus on the Invisible Web. The Invisible Web sounds mysterious but you probably visit it regularly without even realizing it.It's simply the portion of the web not accessible through search engines. PDF documents used to be part of the Invisible Web when search engines were unable to crawl that type of file.

Now the Invisible Web consists of pages that are:
In databases beyond a search interface,
Dynamic or require user input,
Password protected,
Involved with real time data that changes quickly,
Coded off limits (a standard respected by most search engines)
Disconnected pages that have no link to or from them.

The following tools for the Invisible Web will expand the boundaries of the information you can access as well as enhance your research.

The Invisible Web Directory
http://www.invisible-web.net/
UC Berkley Library Tutorial
http://www.lib.berkeley.edu/TeachingLib/Guides/Internet/InvisibleWeb.html
Librarian Index to the Internet
http://lii.org/
Profusion
http://www.profusion.com/
The Invisible Web: Hidden Online Research Tools
http://www.virtualchase.com/iweb/index.html


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