In addition, you can also use the Flash CS3, by Flex 2 and 3, or even through open source tools. Fortunately, we have made this book to teach a new language for both aspiring ActionScript developer, and an experienced ActionScript developer who wants to improve their knowledge to the new version. In addition, we explain how to use either ActionScript 3.0 Flash CS3 and Flex through 2 / 3 (open source ActionScript developers should also be able to take advantage of this book.) And practical examples are countless, the reference section is also included in the back of the book allows the reader to easily find the syntax. No previous ActionScript knowledge is assumed, although it would be beneficial.