Some Fast Facts About the Invisible Web
- Even the best search engines can access only about 16% of the available information on the World Wide Web. Therefore 84% of the information is excluded. That 84% has become known as the Invisible Web.
- Put another way, the size of the Invisible Web is 500 times larger than the Surface Web.
- The Invisible Web contains nearly 550 billion individual documents as compared with the Surface Web's 1 billion.
- The Invisible Web is the largest growing category of new information on the Web.
- 95% of the Invisible Web is publicly accessible information.
- More than half of the Invisible Web resides in topic specific databases.
(Bergman 2001)
