An excellent successor to Hennessy and Patterson's _Computer Organization and Design_, this book presents computer architecture and design as something quantitative that can be studied in the context of real running systems rather than in an abstract format. The concepts are again grounded in real machine architectures and many of the examples are contemporary architectures, such as PowerPC chips and Intel 80x86. _Computer Architecture_ follows the same outline as its predecessor, but covers information in more depth, moving rapidly from introductory discussions to issues just shy of computer design research. The format again includes an excellent mix of exercises and historical background. This book is recommended for people with some experience in digital design--or people who have read and understood the authors' first text.