IOS
It is Apple’s mobile operating system used to run the popular iPhone, iPad, and iPod Touch devices. Formerly known as the iPhone OS, the name was changed with the introduction of the iPad. It interprets the commands of software applications (“apps”) and it gives those apps access to features of the device, such as the multi-touch screen or the storage. It is the interface between the operating person and the device. Mobile operating systems like IOS different from most other operating systems because IOS put each application in its own protective layer