Who was the programmer of Ms-Dos operating system
Bill Gates was the programmer of Ms-Dos operating system.
The programmer issue is much harder to get to the truth on. Here's the canonical "fanboy" picture of Bill Gates, Programmer extraordinaire, from about.com: Although Bill Gates is known mostly for his founding of Microsoft he also has done a number of programming jobs before becoming the worlds richest man.
MS-DOS was the main operating system for IBM PC compatible personal computers during the 1980s and the early 1990s, when it was gradually superseded by operating systems offering a graphical user interface (GUI), in various generations of the graphical Microsoft Windows operating system.
MS-DOS (Microsoft Disk Operating System) is a single-user, single-tasking computer operating system that uses a command line interface. In spite of its very small size and relative simplicity, it is one of the most successful operating systems that has been developed to date.
Short for Microsoft Disk Operating System, MS-DOS is a non-graphical command line operating system derived from 86-DOS that was created for IBM compatible computers. MS-DOS originally written by Tim Paterson and introduced by Microsoft in August 1981 and was last updated in 1994 when MS-DOS 6.22 was released.