|Company / developer||Apple Inc.|
|OS family||Unix-like (OS X)|
(with some open source components)
|Initial release||June 27, 2007|
|Update method||iTunes and OTA Updates|
|Package manager||App Store|
|Supported platforms||iPhone, iPod touch, iPad, iPad mini, Apple TV|
|Kernel type||Hybrid (XNU)|
|Default user interface||SpringBoard|
iOS, formerly known as iPhone OS (and just Mac OS X), is the operating system for the iPhone, iPod touch, iPad and Apple TV. iOS has four abstraction layers: the Core OS layer, the Core Services layer, the Media layer, and the Cocoa Touch layer. The OS takes ~350MB of the device's total memory storage, this means that users will not get their full storage space.
In iOS 5.0, Apple began pushing towards a computer-less experience for iOS. (e.g.- Devices can be activated and updated over the air.) In addition, multitasking gestures are now enabled by default.