DOS
Family of IBM PC-compatible operating systems / From Wikipedia, the free encyclopedia
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DOS (/dɒs/, /dɔːs/) is a family of disk-based operating systems for IBM PC compatible computers.[1] The DOS family primarily consists of IBM PC DOS and a rebranded version, Microsoft's MS-DOS, both of which were introduced in 1981. Later compatible systems from other manufacturers include DR-DOS (1988), ROM-DOS (1989), PTS-DOS (1993), and FreeDOS (1998). MS-DOS dominated the IBM PC compatible market between 1981 and 1995.
Although 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,[2] whose use predates the IBM PC. Dozens of other operating systems also use the acronym, beginning with the mainframe DOS/360 from 1966. Others include Apple DOS, Apple ProDOS, Atari DOS, Commodore DOS, TRSDOS, and AmigaDOS.