一个DOS下的多任务程序，是初学者的好参考。- A multi-tasking process under DOS, is a good reference for beginners. A multi-tasking process under DOS, is a good reference for beginners.

操作系统拟操作系统进程调度过程，包含先来先服务，时间片轮转，多级反馈等调度策略。-Simulation of the operating system process scheduling process, including the first come first serve, time slice rotation, multi-level feedback scheduling strategy.-OS operating system process scheduling proces