a scripting language used by Adobe software
ActionScript is a programming language originally developed by Macromedia Inc. (now owned by Adobe Systems). It is a dialect of ECMAScript (meaning it has a superset of the syntax and semantics of the more widely known 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.
Two important features of ActionScript 1.0 that distinguish it from later versions are its loose type system and its reliance on prototype-based inheritance. (Loose typing refers to the ability of a variable to hold any type of data. Prototype-based inheritance is the ActionScript 1.0 mechanism for code reuse and object-oriented programming. Instead of a class keyword that defines common characteristics of a class, ActionScript 1.0 uses a special object that serves as a "prototype" for a class of objects. All common characteristics of a class are defined in the class's prototype object and every instance of that class contains a link to that prototype object.)
References:
https://en.wikipedia.org/wiki/ActionScript#Timeline_by_ActionScript_version
