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What does DOS stand for?

Find out what DOS stands for.

DOS was an early operating system for IBM computers. [©Shutterstock, 2010]
©Shutterstock, 2010
DOS was an early operating system for IBM computers.

DOS stands for disk operating system, a program that controls the computers transfer of data to and from a hard or floppy disk. Frequently it is combined with the main operating system. The operating system was originally developed at Seattle Computer Products as SCP-DOS. When IBM decided to build a personal computer and needed an operating system, it chose the SCP-DOS after reaching an agreement with the Microsoft Corporation to produce the actual operating system. Under Microsoft, SCP-DOS became MS-DOS, which IBM referred to as PC-DOS (personal computer), and which everyone eventually simply called DOS.

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