Özgür Özkök
An operating system (OS) is software that manages computer hardware and software resources and provides standard services for computer programs. A software layer sits between the computer hardware and the user. The OS controls the computer hardware resources and provides a platform for running application software.
This is the iPhone introduction excerpt from the Macworld San Francisco 2007 Keynote Address January 9th, 2007. Steve Jobs made the claim that it was 5 years ahead of any other phone. AppleTV was also introduced that day.