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You've used Google or Yahoo before right? If you have, you've used a search engine. So how do they work? Delve a little deeper into the wonderful world of the internet and searching, before attempting to take all the following self marking tests.

Here's a great video to start:

You can also read more about the topic here:

If you want a history of search engines, including information on the first ever prototype search engine (Archie), click here: