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Bing (known previously as Live Search, Windows Live Search, and MSN Search) is a web search engine (advertised as a "decision engine"[1]) from Microsoft. Bing was unveiled by Microsoft CEO Steve Ballmer on May 28, 2009, at the All Things Digital conference in San Diego, Calif., for release on June 1, 2009.[2] Notable changes include the listing of search suggestions while queries are entered and a list of related searches (called "Explore pane") based on[3] semantic technology from Powerset, which Microsoft purchased in 2008.[4]

On July 29, 2009, Microsoft and Yahoo! announced a deal in which Bing would power Yahoo! Search.[5] All Yahoo! Search global customers and partners were expected to have made the transition by early 2012.[6]

In October 2011, Microsoft stated that they were working on new back-end search infrastructure with the goal of delivering faster and slightly more relevant search results for users. Known as "Tiger", the new index-serving technology has been incorporated into Bing globally since August 2011.[7] In May 2012, Microsoft announced another redesign of its search engine that includes "Sidebar", a social feature that searches users' social networks for information relevant to the search query.[8] In September 2013, a new-look Bing was released to tie-in with Microsoft's "Metro" design language.


  1. "Welcome to Discover Bing". Discover Bing. Retrieved 16 January 2010. 
  2. "Microsoft’s New Search at Helps People Make Better Decisions: Decision Engine goes beyond search to help customers deal with information overload". Microsoft. Retrieved 29 May 2009. 
  3. "Microsoft Bing rides open source to semantic search". The Register. Retrieved 2010-01-01. 
  4. "Microsoft to Acquire Powerset". Bing. Retrieved 1 January 2010. 
  5. "Microsoft and Yahoo seal web deal". BBC. 29 July 2009. Retrieved 10 May 2012. 
  6. "When will the change happen? How long will the transition take?". Yahoo!. 1 December 2011. Retrieved 10 May 2012. 
  7. "Bing Unleashing Tiger to Speed Search Results". Search Engine Watch. 30 September 2011. Retrieved 3 October 2011. 
  8. Goldman, David (10 May 2012). "Bing fires at Google with new social search". CNN Money. Retrieved 10 May 2012.