In Brief
ActionScript 2.0 offers a range of structures for object-oriented programming.
Classes can be created as separate AS files using the new Script Editor.
AS files can be placed anywhere and are automatically found by the ActionScript created in the Actions panel through a user-defined path.
You can create simple and sophisticated scripts using the Behaviors panel without having to write a program in the Actions panel.
The Actions panel has a single scripting mode with code hints that appear automatically when suffixes are used with variable and object names.
ActionScript 2.0 is case sensitive and uses strong typing of variables.
ActionScript 2.0 has adapted the ECMA v.4 standards and performs very much like JavaScript 2.0, but ActionScript 2.0 still maintains its unique Flash-related terms.