iPhone OS - Developed by Apple, is an operating system for the iPhone and iPod touch, Apple's smart phone and touch screen portable media player, respectively. These devices are multi touch, meaning they recognize multiple points of contact. This feature enables users to interact with iPhone Os devices using finger motions such ad tapping a button on the screen, sliding your finger to drag an object and pinchingor unpinching your fingers to zoom in or out.

With the iPhone OS users can manage contact and notes, send and receive e-mail and text messages, take pictures, view a compass, connect to the internet wirelessly and browse the web, check stock, access map and obtain dictionary, listen to the music, watch movies and videos and display photos. It also provides Wi-Fi access to the iTunes Music Store.