Chief Executive Officer Steve Ballmer Delivers The Keynote At The Microsoft Build Developer Conference


Attendees participate in a hack-a-thon during the Microsoft Corp.... News PhotoCalifornia,Computer,Computer Crime,Computer Equipment,Computer Hacker,Computer Programmer,Computer Software,Development,Electronics Industry,Finance,Horizontal,Microsoft,North America,Operating System,San Francisco - California,Technology,The Americas,USAPhotographer Collection: Bloomberg 2013 BloombergAttendees participate in a hack-a-thon during the Microsoft Corp. Build Developers Conference in San Francisco, California, U.S., on Wednesday, June 26, 2013. Facebook Inc. is building an application for Microsoft Corp.'s Windows 8, adding one of the most popular programs still missing from the operating system designed to help Microsoft gain tablet customers. Photographer: David Paul Morris/Bloomberg via Getty Images