iOS
30 splinters use it.
iOS (previously iPhone OS) is a mobile operating system developed and distributed by Apple Inc. Originally released in 2007 for the iPhone and iPod Touch, it has been extended to support other Apple devices such as the iPad and Apple TV. Unlike Microsoft's Windows Phone (C++) and Google's Android, Apple does not license iOS for installation on non-Apple hardware. As of September 12, 2012 (2012-09-12)
