Dictionary of Computer and Internet Terms: DOS (Disk Operating System)
DOS (Disk Operating System)
the name of various operating systems produced by various computer manufacturers, including an early operating system for the IBM 360; the disk operating system for theApple II (Apple DOS); MS-DOS, developed by Microsoft for 16-bit microcomputers; PC-DOS, a version of MS-DOS commonly sold with the IBM PC; and Caldera DOS (formerly DR-DOS), a third-party substitute for MS-DOS.
Since 1983 the name DOS has almost always referred to MS-DOS or equivalent operating systems, as it does throughout this book.
