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Jobs' reasoning was that developers could build web applications through the Safari web browser that "would behave like native apps on the i Phone".
In June 2010, Apple rebranded i Phone OS as "i OS".
The home screen appears whenever the user unlocks the device or presses the physical "Home" button whilst in another app.
Before i OS 4 on the i Phone 3GS (or later), the screen's background could be customized only through jailbreaking, but can now be changed out-of-the-box.
Jobs favored the former approach but pitted the Macintosh and i Pod teams, led by Scott Forstall and Tony Fadell, respectively, against each other in an internal competition, with Forstall winning by creating the i Phone OS.
To avoid any potential lawsuit, Apple licensed the "IOS" trademark from Cisco.
In i OS 7 and later, Spotlight is accessed by pulling down anywhere on the home screen (except for the top and bottom edges that open Notification Center and Control Center). As with i OS 7 and 8, pulling down on any homescreen will show Spotlight.
However, it can also be accessed as it was in i OS 3 – 6.
It is available for all i OS devices with 64-bit processors; the i Phone 5S and later i Phone models, the i Pad (2017), the i Pad Air and later i Pad Air models, all i Pad Pro models, the i Pad Mini 2 and later i Pad Mini models, and the sixth-generation i Pod Touch.
In 2005, when Steve Jobs began planning the i Phone, he had a choice to either "shrink the Mac, which would be an epic feat of engineering, or enlarge the i Pod".
Originally unveiled in 2007 for the i Phone, i OS has been extended to support other Apple devices such as the i Pod Touch (September 2007) and the i Pad (January 2010).