Microsoft might have sold hundreds of millions of Windows 7 licenses, and Apple might be managing to to persuade tens of millions of people to buy iOS-powered devices every quarter, but the real winner when it comes to operating systems in 2011 as been Android, Google’s mobile operating system. Based on the Linux kernel, Android is a wildly successful platform. By November of this year some 200 million Android powered devices were in use. If that sounds impressive, consider that this number is growing by some 550,000 daily (or 3.85 million a week, 16.5 million a month). To put this into context, last quarter Apple sold 17 million iPhones and 11 million iPads over the three month period.