INTRODUCTION
------------
ucore is a teaching OS which is derived from xv6&jos in MIT, OS161 in Harvard and Linux.
ucore was developed and used in Department of Computer Science & Technology, Institute for Interdisciplinary Information Sciences, Tsinghua University.
The codes in the files that constitute xv6&jos are Copyright (2006-Current) Frans Kaashoek, Robert Morris, and Russ Cox and uses MIT License.
The codes in the files that constitute OS/161 are written by David A. Holland.
The codes in the files that constitute ucore are Copyright (2010-Current) Yu Chen, Naizheng Wang, Yong Xiang and uses GPL License.
The documents in the files that constitute ucore are Copyright (2010-Current) Yu Chen, Yong Xiang and uses Creative Commons Attribution/Share-Alike (CC-BY-SA) License. 
CONTENTS
--------
lab1: boot/protect mode/stack/interrupt
lab2: physical memory management
lab3: virtual memory management
lab4: kernel thread management
lab5: user process management
lab6: scheduling
lab7: mutex/sync
lab8: filesystem

EXERCISE STEPS
--------------
1 $cd labX  
2 read codes (specially the modified or added files)
3 add your code
4 compile your code
  $make
5 check your code
  $make qemu
OR
  $make grade
6 handin your code
  $make handin

GRADE/RANK
----------
Superman: Finish all OS labs in one month by yourself
Master: Finish all OS labs in two month by yourself
Veteran: Finish all OS labs in three month by yourself
Apprentice: Finish all OS labs in one semester with other guy's help
 
RESOURCE REPOSITORY
-------------------
Basic OS labs (for students who learn OS course)
The newest lab codes and docs is in https://github.com/chyyuu/ucore_pub

Advanced OS labs (for OS geeks or hackers or guys with Superman/Master Rank)
The newest lab codes and docs is in https://github.com/chyyuu/ucore_plus

LEARNING DISSCUSS GROUPS
------------------------
If you have any questions about ucore basic os labs, 
you can subscribe to the Google Groups "os-course" group (http://groups.google.com/group/oscourse?hl=en.)
To post to this group, send email to oscourse@googlegroups.com.
To unsubscribe from this group, send email to oscourse+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/oscourse?hl=en.

DEVELOPMENT DISCUSS GROUPS
--------------------------
If you have any questions about ucore advanced os labs, 
If you want to be a developer of ucore or pay attention to the development of ucore, 
you can subscribe to the Google Groups "ucore_dev" group (http://groups.google.com/group/ucore_dev?hl=en.)
To post to this group, send email to ucore_dev@googlegroups.com.
To unsubscribe from this group, send email to ucore_dev+unsubscribe@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/ucore_dev?hl=en.

UCORERS (Contributors)
---------------------
Junjie Mao, Yuheng Chen, Cong Liu, Yang Yang, Zhun Qu, Shengwei Ren, Wenlei Zhu, Cao Zhang, Tong Sen, Xu Chen, 
Cang Nan, Yujian Fang, Wentao Han, Kaichen Zhang, Xiaolin Guo, Tianfan Xue, Gang Hu, Cao Liu, Yu Su,Xinhao Yuan, ...