Web Research

According to Wendy Boswell, editor of Ask.com's section on Web Search, we see only a few threads in Internet web. She says in How to Search the Invisible Web:

Google, considered by most people in the know to have the largest search database, has about eight billion pages in its index. Those eight billion pages seem like a lot until you consider that the Deep Web is estimated to be 500 times bigger than the searchable Web. Multiply 500 by the 8 billion in Google's index plus add in the fact that Google is only indexing a fraction of the searchable Web (around 250 billion pages are on the Web today)

Finding the resources in those hidden pages may require use of special search engines. She listed Top Ten Alternative Search Engines. These two articles are part of a series that's worth studying if you use the Internet for research. You can subscribe to an RSS feed of this series' tag with http://www.lifehacker.com/software/seek-and-ye-shall-find/index.xml in your feed reader. [research resource]