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Microsoft Disk Operating System (MS-DOS)

Definition - What does Microsoft Disk Operating System (MS-DOS) mean?

The Microsoft Disk Operating System (MS-DOS) is an operating system developed for PCs with x86 microprocessors. It is a command-line-based system, where all commands are entered in text form and there is no graphical user interface.

MS-DOS was the most commonly used member of the family of disk operating systems. It was the main choice as an operating system for IBM PC-compatible computer systems during the 1980s to mid-1990s. MS-DOS was gradually replaced by system's with graphical user interfaces, particularly Microsoft Windows.

Techopedia explains Microsoft Disk Operating System (MS-DOS)

MS-DOS was originally called 86-DOS. It was written by Tim Patterson (considered the father of DOS) and owned by Seattle Computer Products. Microsoft bought 86-DOS for $75,000, licensed the software and released it with an IBM PC as MS-DOS 1.0 in 1982. MS-DOS was originally designed to run on any computer with an Intel 8086 processor, but the various hardware versions on these computers made compatibility difficult. As a result, Microsft provided hardware equipment manufacturers with a development kit that could be used to tune the MS-DOS operating system for the computer's specific hardware. As a result, there were many versions of MS-DOS. There were also compatibility issues with MS-DOS and IBM where some machines were compatible with MS-DOS but not IBM. These computers could only run programs that were written for MS-DOS and did not depend on any of IBM's peripheral architecture.

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