What is actionscript?

ActionScript

ActionScript is an object-oriented language originally developed by Macromedia Inc. (now owned by Adobe Systems). It is a dialect of ECMAScript (meaning it is a superset of the syntax and semantics of the language more widely known as JavaScript), and is used primarily for the development of websites and software targeting the Adobe Flash Player platform, used on Web pages in the form of embedded SWF files. The language itself is open-source in that its specification is offered free of charge and both an open source compiler (as part of Adobe Flex) and open source virtual machine (Mozilla Tamarin) are available.

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Some articles on actionscript:

SWF
... SWF ( /ˈswɪf/ SWIF) is an Adobe Flash file format used for multimedia, vector graphics and ActionScript ... It may also be used for programs, commonly browser games, using ActionScript ... be built with open source Motion-Twin ActionScript 2 Compiler (MTASC), the open source Ming library and the free software suite SWFTools ...
Comparison Of Integrated Development Environments - ActionScript
... Proprietary Yes Yes Yes JVM Yes No Yes Yes Yes Realaxy ActionScript Editor Proprietary Yes Yes Yes JVM Yes No No Yes Yes ...
List Of Tools For Static Code Analysis - By Language - ActionScript
... Apparat — A language manipulation and optimization framework consisting of intermediate representations for ActionScript. ...
ActionScript - Code Protection
... In opposition to the decompilers, ActionScript obfuscators have been introduced to solve this problem, which transform code into a form that breaks decompiler output while ... The following is an example of ActionScript 3.0 code generated by a decompiler program, before and after obfuscation ...
MTASC
... MTASC (Motion-Twin ActionScript 2 Compiler) is an ActionScript 2.0 compiler written in the OCaml programming language by the company Motion-Twin ... MTASC is not compatible with ActionScript 2.0 in the local variables scoping, local function definitions, et al ... MTASC will not support ActionScript 3.0, which is supported by its successor, haXe ...