The BBC show why they're among the top news agencies in the world, with this very interesting article about different search softwares available to end users.

When our computers search our hard drives theys till do it the hard way - every word of every page of every document. Now the experts are using indexing to make our lives a lot more efficient.

Just check out the film [WMV or RealVideo] on the above mentioned page. It's very clarifying and is very helpful for showing this technology, which is basically a blinder for every person who ever needs to search for stuff on their computer or the internet, e.g. when you need to find a file containing the word "pendulum" or instantly get a list of all files you've modified, on hard disk or your computer network, during the past 24 hours. And there's more. Check the film out!