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| | Mac OS X System Architecture |
 | | Mac OS X is a uniquely powerful development platform, supporting multiple development technologies including UNIX, Java, the proprietary Cocoa and Carbon runtime environments, and a host of open source, web, scripting, database, and development technologies. |
 | | Mac OS X Tiger also offers powerful user technologies like Spotlight and Dashboard that can be exploited by developers in their applications. |
 | | Aqua is the overall appearance and behavior of Mac OS X. Aqua defines the standard appearance of specific user interface components such as windows, menus, and controls. |
| developer.apple.com /macosx/architecture/index.html (830 words) |
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