Operating Systems Chapter 1: Introduction 1 What is an operating system(定义) 12 History of operating systems(历史) 13 The operating system z00(分类) 14 Computer hardware review(底层硬件) 1 Operating system concepts(概念) n1 System calls(系统调用) 17 Operating system structure(结构) Gao Haichang, Software School, Xidian UniversityOperating Systems Gao Haichang , Software School, Xidian University 4 Chapter 1: Introduction  1.1 What is an operating system (定义)  1.2 History of operating systems (历史)  1.3 The operating system zoo (分类）  1.4 Computer hardware review（底层硬件）  1.5 Operating system concepts（ 概念）  1.6 System calls（系统调用）  1.7 Operating system structure （结构）