An early Microsoft operating system for x86-based personal computers.

Microsoft Disk Operating System
Announcement / Release
August 1980
September 14, 2000
Birth Place
Redmond, Washington, United States of America


The Microsoft Disk Operating System is an operating system for x86-based personal computers mostly developed by Microsoft. It was the most commonly used member of the DOS family of operating systems, and was the main operating system for IBM PC compatible personal computers during the 1980s to the mid-1990s, when it was gradually superseded by operating systems offering a graphical user interface (GUI), in various generations of the Microsoft Windows operating system.

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