Dos: Acronym for Disk Operating System.It is a program,sometimes supplied by the computer manufacturer in read only memory (ROM),that controls the disk drive and the passing of signals and data to and from the computer.

• Dos:英文是“磁碟操作系统”的字首字。它是一个程式。有时，电脑制造商以唯读贮记方式附在机上。这个程 式控制磁碟机和电脑间的信号来往。