InformationWeek: 2009 May 18
"Wolfram Research, makers of the noted computational software Mathematica, on Monday launched Wolfram/Alpha, a service the company characterizes as a 'computational knowledge engine.'
It's not a search engine. Though widely compared to Google, Wolfram/Alpha does not try to match queries against a list of indexed documents. It attempts to compute answers to questions based on established facts. "
