If you are looking what was the original name of the operating system microsoft windows? The answer is MS-DOS.
The origin of MS-DOS dates back to 1981, when IBM introduced the IBM PC .
The company had asked Digital Research, the creator of PC, which dominated the market at the time, to port its system to PC.
Microsoft is known for its achievements in the BASIC interpreter, but there is nothing in its box for writing DOS quickly. Then, she chose QDOS (for the « Quick and Dirty Operating System ») created by a small company in Seattle, and bought QDOS for several thousand dollars and gradually improved it.
The version sold to IBM will be called PC-DOS.
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