This was Microsoft's first Operating System, and it also became the first widely used operating system for the IBM PC and its clones. MS-DOS 1.00 was actually a renamed version of QDOS, which Microsoft bought from a Seattle company, appropriately named Seattle Computer Products, in July 1981. MS-DOS 1.00 shipped with the new IBM Personal Computer on the 12th of August 1981.
|Microsoft Operating System Versions|
|Microsoft Operating System Versions:|