PC-DOS is a disk operating system used by IBM personal computer This paperanalyses its characteristic on structure from the formation of PC--DOS and givesillustration on its disk and memory allocation.

• PC-DOS是IBM个人计算的机上使用的磁盘操作系统。 本文从PC-DOS的形成,分析其结构上的特点,对PC-DOS磁盘、内存空间的分配作了明确的说明。