The CD contains:
All the texts of the book are also in pdf files. If you like to draw in the book, or if you need a copy of it for other reasons, don't do a photocopy, simply print the chapter you need using the pdf files included in the CD.
The software Vensim PLE is included in the CD, with all the tutorials.
All the models included in the book are also included in the CD, so if you have any problem building a model or simply you like to simulate a model, you can take it from the CD.
More than 30 different versions of the models of the book are included in the CD, with different hypothesis, simulations and scenarios.