摘要：
1.1 Introduction Welcome to this book! 欢迎来到这本书。We are delighted to have this apportunity to convey the excitement of the world of computer systems.我们很... 阅读全文
摘要：
Civilization advances by extending the number of important operations which we can perform without thinking about them. Alfred North Whilehead An Intr 阅读全文