Microsoft CEO Steve Ballmer speaks at the Microsoft "Build" conference in San Francisco in June.
Robert Galbraith /Reuters/Landov
August 23, 2013 Steve Ballmer became the company's CEO in January 2000. In recent years, Microsoft has come under increasing criticism for not keeping up with the shift to mobile phones.
December 13, 2011 Stratolaunch Systems is a new venture from Microsoft billionaire Paul Allen and aviation pioneer Burt Rutan that plans to launch rockets into space from a specially built jet aircraft with a wingspan greater than the length of a football field.
March 30, 2011 The book's "critical portrait" of Bill Gates "has created a rift" between the men, the newspaper says. Gates says their recollection of events may differ, but he values their friendship and Allen's contributions to their work.
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