In July 2000 I attended the conference on Technology in Mathematics Education in Beirut. After my lecture on the role of programming in teaching mathematics, several teachers asked me if I can tell them something about the tools that can be used for teaching high school mathematics. They knew about such packages as Maple V, Mathematica or Derive, but they didnt have the resources to buy these packages or site licenses for their schools. As a result of this question, we went into a long and very interesting discussion about MuPAD. It was at this time that I started thinking about writing a book about MuPAD, which could be useful for teachers of mathematics and their students. Now that dream has come true and you have this book in your hands. I hope you will enjoy it. This book should be considered as first steps through mathematics with MuPAD. It is not a MuPAD reference book and, in fact, many MuP AD-related topics are not discussed here at all. Nor is it a text for a regular computer-assisted course of mathematics. What it is is an exciting excursion through through different areas of mathematics facilitates by MuPAD, and I will show you the basic instructions that are useful for these specific areas. I will explore many topics and show you many examples. However, it may turn out that the particular topic you are interested in has been omitted.