一个简单的css构建的树.可以构建动态树。-a simple tree made by css.it can be a dynamic tree with jsp or asp.

操作系统进程管理实验，包括进程树的创建和简单的ubantu中对进程的管理。-Operating system process management experiments, including the process of creating a tree and simple ubantu in the management of the process.