First released on August 12, 1981, MS-DOS became the foundation for business computing for almost two decades. This article details different versions and releases that all stemmed from Gary Kildall s QDOS.
Before Microsoft and Intel dominated the PC market with a common platform, the CP/M operating system did something similar for small business machines in the late 1970s and early 1980s—until MS-DOS pulled the rug out from under it. Here’s more about CP/M, and why it lost out to MS-DOS.