Deep web

Time for a new fluency nugget. The topic for today is the 'deep web', also known as the 'invisible web'. To quote from Wiki article, which I have just finished updating:

The deep web (or invisible web or hidden web) is the name given to pages on the World Wide Web that are not part of the surface web that is indexed by common search engines.

Now, this would be just a trivia if not for the information on of how to access the deep web and the fairly extensive list of specialized search engines listed on Wiki page. Some of them are not very efficient, but others may prove to be quite useful when you want to find more information.

Of course, beware of the FUTON bias...