Android is an open source software platform and operating system developed by Google and the Open Handset Alliance. Some key features of Android include Java support, multi-touch, Bluetooth, GPS, and an open source development model. It has been the most widely used mobile OS within a few years of its launch. Android has released many versions since 2008, starting with Android 1.0 through the current Android 6.0. Competing mobile operating systems include Apple's iOS, first released in 2007, and Microsoft's Windows Mobile OS, launched in 2010.