Object-Oriented ActionScript
http://www.macromedia.com/devnet/mx/flash/articles/as2_moock.html

Moock, Colin
Adobe
2004

Abstract:

Ironically, Flash users who are new to object-oriented programming (OOP) are often familiar with many object-oriented concepts without knowing their formal names. This chapter demystifies some of the terminology and brings newer programmers up to speed on key OOP concepts. It also serves as a high-level overview of OOP in Flash for experienced programmers who are making their first foray into Flash development.