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What is the full form of DOS

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Computer Abbreviations
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What is the full form of "DOS"?

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Correct Answer: Option C
A disk operating system (abbreviated DOS) is a computer operating system that resides on and can use a disk storage device, such as a floppy disk, hard disk drive, or optical disc. A disk operating system must provide a file system for organizing, reading, and writing files on the storage disk.
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