
Other search engines like Google, compare search terms against billions of documents stored on its servers, before pointing to the pages on which the correct answer is probably kept. Although this method is very successful, computer scientists have continued trying to create a system that can understand human language. According to some scientists Alpha is far more impressive than what has gone before."Wolfram Alpha is like plugging into a vast electronic brain. It provides thorough questions asked in many different ways, and it computes answers – it doesn't merely look them up in a big database."
Watch this space or see more at http://www.guardian.co.uk/technology/2009/mar/09/search-engine-google