The ActionScript 3.0 Reference for the Adobe Flash Platform is a platform-wide reference combining the ActionScript language elements, core libraries, and component packages and classes for all Flash Platform tools, runtimes, services, and servers. Filtering capabilities allow you to view specific products, runtimes, and versions in which you are interested. This platform-wide reference combines the reference information for the following Adobe products and runtimes:
Adobe AIR4.0 and earlier
Open Source Media Framework 2.0 and earlier
Adobe ColdFusion 10 and earlier
Adobe LiveCycle Data Services ES4 and earlier
Adobe Flash Player 12.0 and earlier
Adobe Flash Professional CC and earlier
Adobe Flex 4.7 and earlier

Beta ActionScript 3.0 Reference for the Adobe Flash Platform
The ActionScript 3.0 Reference for the Adobe Flash Platform

Additional ActionScript references
Understand the enhancements in ActionScript 3, including features of the core language and improved API that increases control of low-level objects.
Learn about core ActionScript classes, strings and arrays, errors, regular expressions and XML, events, networking and communication, client system interaction, HTML content in Adobe AIR, and security.