Wolfram|Alpha (also written WolframAlpha or Wolfram Alpha) is an answer-engine developed by Wolfram Research. It is an online service that answers factual queries directly by computing the answer from structured data, instead of providing a list of documents or web pages that might contain the answer. It was announced in March 2009 by British mogul Stephen Wolfram, and was released to the public on May 15, 2009.