Others include Apple DOS, Apple ProDOS, Atari DOS, Commodore DOS, TRSDOS, and AmigaDOS.įurther information: Comparison of DOS operating systems and Timeline of DOS operating systems Origins Apple CP/M from Digital Research on a Z-80 SoftCard for the Apple II Dozens of other operating systems also use the acronym, beginning with the mainframe DOS/360 from 1966. MS-DOS dominated the IBM PC compatible market between 19.Īlthough the name has come to be identified specifically with this particular family of operating systems, DOS is a platform-independent acronym for disk operating system, whose use predates the IBM PC. Later compatible systems from other manufacturers include DR-DOS (1988), ROM-DOS (1989), PTS-DOS (1993), and FreeDOS (1998). The DOS family primarily consists of Microsoft's MS-DOS and a rebranded version, IBM PC DOS, both of which were introduced in 1981. The boot screen and command-line interface of MS-DOS 6, with an example of its directory structure The boot screen and command-line interface of FreeDOS, showing version information and an example of its directory structureĭOS ( / d ɒ s/, / d ɔː s/) is a family of disk-based operating systems for IBM PC compatible computers. Not to be confused with Microsoft Windows.
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