Currently most people use Google, Bing or other search engine mostly to merely search for something. Most will either choose to get information back in plain text view search result or image thumbnail search result. Either of these results will display a link that will lead to user to discover more information whether it is in text or in image form.
When you need a search that return just the data you want instead of endless links then Wolfram|Alpha a computational knowledge engine might be just the other option. Basically the search engine generates output by doing computations from its own internal knowledge base, instead of searching the web and returning links. If you are seeking for more reliable result from closed collective data set then Wolfram might certainly suit your need.
The Wolfram|Alpha search basically stated that “It can only know things that are known and somehow public, it only deals with facts, not opinions. It limits the computation time for each query.” and most of its data come from systematic primary sources. to learn more go to Wolfram|Alpha FAQ page.
Wolfram|Alpha is known for its mathematical computation so students these days are pretty lucky they can type any mathematical question and get their answers at an instant. Wolfram|Alpha is also available for major phone platforms such as iPhone, Android, iPad and ebooks – now I wonder how student cheat during their test using these modern technology. I hope teachers will put all their gadget away before entering test room. I tried to play around with this search engine and here some screens I captured.