NSBundle:
*Getting the Main Bundle
To get the main bundle in Cocoa application, call the mainBundle class method of the NSBundle class.
``` NSBundle *mainBundle; // Get the main bundle for the app; mainBundle = [NSBundle mainBundle];
2. Getting a reference to the main bundle using Core Foundation.
> Use the ***CFBundleGetMainBundle*** function to retrieve the main bundle for your C-based application.
> ```
CFBundleRef mainBundle;
// Get the main bundle for the app
mainBundle = CFBundleGetMainBundle();