【摘要】 本文介绍的小型多任务操作系统（SmallMultitaskOperatingSystem）是在MS－DOS环境支持下的一个多任务分时操作系统，它以时间片轮转法对CPU进行分时，并以固定分区法进行模拟内存分配，使SMOS能接收并分时处理多用户输入的任务（如16个或更多）此系统是根据多年操作系统教学经验及需要设计的．并经过五届学生实验实现，证实此系统是有效的.这一MS－DOS上的CPU分时思想，不仅可以用于教学实验，也可用于实际的计算机控制系统中更多还原

【Abstract】 SMOS(Small Multitask Operating System) implemented on MS-DOS is a multiprocessor Time-sharing Operation System. It shares the CPU time by time-slicing and allocates the simulating memory with fixed partition which makes it possible to receive and process multiple user’s tasks (sixteen or more ). It was designed through authors’ experience on teaching operating system, and was realized in experiments by 5 grades of students, which proves to be an effective system. The ideas of CPU time-sharing based on MS-DOS can be used in teaching experiments, and in the real computer control system as well.更多还原