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Text replacement - "<google>BUY_IOS4</google>" to "<htmlet>ios9_upgrade</htmlet>"
<googlehtmlet>BUY_IOS4ios9_upgrade</googlehtmlet>
The Cocoa Touch layer sits at the top of the iOS stack and contains the frameworks that are most commonly used by iPhone application developers. Cocoa Touch is primarily written in Objective-C, is based on the standard Mac OS X Cocoa API (as found on Apple desktop and laptop computers) and has been extended and modified to meet the needs of the iPhone.
