What is this book about? Please take this book as it is, a working docu ment. It started as an idea that has grown. It will never be correct but should be self-correcting. In the limit, if there is one, the book should approach a 'correct' state. It is not the detail, and the numbers, that matter, but the structures and the order. These structures are inherently linked with the many minds that have made Maple, the minds of perhaps the best mathematicians, certainly some of the most useful. Our environment is not separate from mathematics; mathematics is but one tool, of several, to help with...