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| Application software from Apple that other products can interact with and extend. |  | Programming interfaces for recording, processing, playing, and creating sound content. |  | A set of C APIs for developing applications for Mac OS X. | 
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| Object-oriented frameworks for developing applications for Mac OS X. |  | A framework providing basic software services to programs and application environments. |  | The open source foundation of Mac OS X, based on 4.4BSD UNIX. | 
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| Mac OS X technologies essential to game developers. |  | Programming interfaces for creating 2D, 3D, and PDF content. |  | Resources for developing hardware, device drivers, and device-access software. | 
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| Technologies for web content, web server, and web-enabled client applications. |  | An environment for developing cross-platform applications. Java is built into Mac OS X. |  | Indispensable Reference Library resources that describe Mac OS X at a high level. | 
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| Resources for working with Apple's server platform. |  | Protocols and services that support networking and communication capabilities. |  | Open source technologies, programming languages, servers, and toolkits. | 
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| Support for improving code and hardware performance. |  | Tools and programming interfaces to help move code to Mac OS X. |  | A cross-platform technology for creating, delivering, and playing multimedia content. | 
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| Scripting languages and tools, workflow automation, and application scriptability. |  | Authentication, authorization, and cryptographic services. |  | A suite of developer tools, including Xcode and UNIX tools. | 
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| The look and feel of Mac OS X application software. |  |  |  |  | 
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| View legacy documents, including technologies, features, products, APIs, and programming techniques that are no longer supported or have been superseded. |