清华大学出版VB6.0多媒体教程（实例程序），多媒体播放器源代码。-Tsinghua University published VB6.0 Multimedia Guide (sample program), multimedia players source code.

清华大学计算机系操作系统课程实验三的源码：Nachos系统的虚拟存储实现机制。-Tsinghua University, Department of Computer Operating System Course Experiment III Source: Nachos virtual storage system implementation mechanism.