This book is dedicated to my wife Margy and son Ryan, who could not help but be deeply involved as I wrote it. In particular to my son Ryan, who is proof that I am the older model – thank you for the time I had to spend away from your childhood.

To my many friends who reviewed this book and especially those who caught errors, I cannot thank you enough for your time and help. In particular, I'd like to thank everyone at ICHEC (the Irish Center for High-End Computing) who adopted me as I finished the book's birthing process and completed this manuscript. Finally, thank you to my colleagues and friends at NIVDIA, who made the whole CUDA revolution possible.