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Technical Notes
Apple provides APIs, file format specifications, and other resources to provide developers with opportunities to interact with and extend various Apple applications.

Apple Applications Resources
A guided introduction and learning path for developers writing code that interacts with Apple applications.   Descriptions of procedural C and Objective-C programming interface elements to Apple's applications.
Apple Applications Topics
A facility for collecting image files from capturing devices, such as digital cameras and scanners.   An application that makes it easy for users to create advanced presentations.   The default web browser for Mac OS X.

A Mac OS X application that retrieves and displays custom information in content-specific windows.   An application that lets users import, organize, store, and play music.  

View legacy technologies, including technologies, features, products, APIs, and programming techniques that are no longer supported or have been superseded.