00 Operating System Principles Course Introduction 
A program that acts as an intermediary between a user of a computer and the computer hardware.
Operating system goals:
- Execute user programs and make solving user problems easier 运行程序
- Make the computer system convenient to use 交互更友好
- Use the computer hardware in an efficient manner 各个硬件更加高效地配合
Why do we need to take this course? 
- Comprehensiveness 全面性 - Programming language, data structure, algorithms, computer architecture, ...... 
- Sustainability 可持续性 - The operating system is still evolving 不断发展 
- Software Development - large-scale 大型 software development 
- One of the foundations of the development of computer science 计算机科学发展的基础之一 
- the continuous advancement of academia and industry 学术界和产业界的不断进步 - SOSP,全球最大的计算机交流会 
- Graduate entrance examination 研究生入学考试 
Assignment 
总评成绩构成:
- Mid-term Examination 平时成绩(半期考试成绩)×10%
- Experiment Assessment 实验成绩 ×30%
- Final Examination 期末成绩 ×60%