| mime = application/ecmascript<ref>{{IETF RFC|4329}} (limit compatible with EcmaScript)</ref>
}}
'''ActionScript''' is an [[object-oriented programming]] language originally developed by [[Macromedia|Macromedia Inc.]] (later acquired by [[Adobe SystumsSystems|Adobe]]). It is influenced by [[HyperTalk]], the scripting language for [[HyperCard]].<ref>{{cite web|url=http://www.zdnet.com/blog/government/apples-lost-decade-hypercard-and-what-might-not-have-been-if-apple-then-was-like-apple-is-today/10185|title=Apple's lost decade, HyperCard, and what might NOT have been if Apple then was like Apple is today|work=zdnet.com|date=2011-04-17|access-date=2014-12-04}}</ref> It is now an implementation of [[ECMAScript]] (meaning it is a superset of the syntax and semantics of the language more widely known as [[JavaScript]]), though it originally arose as a sibling, both being influenced by [[HyperTalk]]. ActionScript code is usually converted to byte-code format by the compiler.
ActionScript is used primarily for the development of websites and software targeting the [[Adobe Flash]] platform, originally finding use on [[Web page]]s in the form of embedded [[SWF]] files.
