Wolfram Alpha is a unique online computational knowledge engine that generates output by doing computations from its own internal knowledge base, instead of searching the web and returning links. It can respond to factual queries directly by computing the answer from structured data, rather than providing a list of documents or web pages that might contain the answer.

It's designed to answer questions related to mathematics, history, geography, engineering, material properties, weather, cooking, business, music, etc. It's also widely used by students for science and mathematics education.

Please note that Wolfram Alpha requires JavaScript to be enabled in your web browser to function properly.