High-end, custom-built "field programmable gate arrays" will run Bing, Office 365, and Azure. It was December 2012, and Doug Burger was standing in front of Steve Ballmer, trying to predict the future. Ballmer, the big, bald, boisterous CEO of Microsoft, sat in the lecture room on the ground floor of Building 99, home base for the company’s blue-sky R&D lab just outside Seattle. The tables curved