Textbook in PDF format This book will no doubt be read by many students of physics and many professors. Students may wonder how many of the calculations it describes could ever have been done before Mathematica. Perhaps sometimes their professors will tell them tales from the heroic age of hand calculation. But mostly I hope that students and professors alike will be able to use the technology that we have built and material of the kind that is included in this book to learn and discover physics in a new and exciting way. – Stephen Wolfram, Creator of Mathematica