We’ve heard rumblings of an imminent Microsoft reorganization for some months; on Thursday, it came to pass. CEO Steve Ballmer has announced the company’s new shape and its new approach to developing products. The reorganization sees an end to the product-based divisions such as “Windows and Windows Live” and “Microsoft Business Division.” What Ballmer wants instead is “One strategy, one Microsoft.” To do this, the company is being organized by function. Microsoft will have four engineering teams—operating system, apps, cloud, and devices—and then a number of company-wide groups for Marketing, Business Development and Evangelism, Advanced Strategy and Research, Finance, Legal, HR, and Operations. Here are the main groups: Terry Myerson, formerly head of the Windows Phone team, will take charge of the Operating Systems Engineering Group.