Bing

Bing (formerly Live Search, Windows Live Search, and MSN Search) is a web search engine (advertised as a "decision engine")from Microsoft. Bing was unveiled by Microsoft CEO Steve Ballmer on May 28, 2009 at the All Things Digital conference in San Diego. It went fully online on June 3, 2009, with a preview version released on June 1, 2009.
Notable changes include the listing of search suggestions as queries are entered and a list of related searches (called "Explorer pane") based on[4] semantic technology from Powerset that Microsoft purchased in 2008.
On July 29, 2009, Microsoft and Yahoo! announced a deal in which Bing would power Yahoo! Search.


"Bing is often referred to as a recursive acronym for BING Is Not Google"
History of Bing:-
MSN Search:

MSN Search was a search engine by Microsoft that comprised a search engine, index, and web crawler. MSN Search first launched in the third quarter of 1998 and used search results from Inktomi.

Windows Live Search 
The first public beta of Windows Live Search was unveiled on March 8, 2006, with the final release on September 11, 2006 replacing MSN Search. The new search engine used search tabs that include Web, news, images, music, desktop, local, and Microsoft Encarta.

Live Search

On March 21, 2007, Microsoft announced that it would separate its search developments from the Windows Live services family, rebranding the service as Live Search. Live Search was integrated into the Live Search and Ad Platform headed by Satya Nadella, part of Microsoft's Platform and Systems division. As part of this change, Live Search was merged with Microsoft adCenter.
Yahoo! search deal
On July 29, 2009, Microsoft and Yahoo! announced that they had made a 10-year deal in which the Yahoo! search engine would be replaced by Bing. Yahoo! will get to keep 88% of the revenue from all search ad sales on its site for the first five years of the deal, and have the right to sell adverts on some Microsoft sites. Yahoo! Search will still maintain its own user interface, but will eventually feature "Powered by Bing" branding.