Changes

Before we delve into the hardware of the iPad we will start by talking about the operating system that sits on top of all the hardware. This operating system is called iOS and is a variant of Apple’s Mac OS X operating system that was originally adapted to run on the iPhone and then subsequently used on the iPad. It is built upon a “UNIX-like” foundation called Darwin and consists of the Mach kernel, core services and media layers and the Cocoa Touch interface. iOS 4 is covered in greater detail in the chapter entitled [[iOS 4 Architecture and SDK Frameworks(iPad)|iOS 4 Architecture and SDK Frameworks]].