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MS-DOS, acronym for Microsoft Disk Operating System. In computer science, MS-DOS-like other operating systems-oversees such operations as disk input and output, video support, keyboard control, and many internal functions related to program execution and file maintenance. MS-DOS is a single-tasking, single-user operating system with a command-line interface. See also Computer.
"MS-DOS," Microsoft® Encarta® Encyclopedia 2000. © 1993-1999 Microsoft Corporation. All rights reserved.