MSDOS
MS-DOS
MS-DOS is an operating system for x86-based personal computers. 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, until it was gradually superseded by operating systems offering a graphical user interface, in particular by various generations of the Microsoft Windows operating system.The above text is a snippet from Wikipedia: MS-DOS
and as such is available under the Creative Commons Attribution/Share-Alike License.