Flash 4 was the first version that allowed for entry of code using a simple
scripting language, which became informally known as ActionScript. In Flash
5, ActionScript evolved even more and became an official scripting language.
With each version of Flash since that time, the capabilities of ActionScript
have become richer, offering interactive control of animation, text, sound,
video, data, and much more. In 2003 ActionScript 2.0 was introduced, and its
capabilities were on par with object-oriented languages such as Java and C#.
You will learn more about object-oriented programming (OOP) starting in
Lesson 4, “Creating ActionScript in External Files.”