| NOUN | communication | disk operating system, DOS | an operating system that is on a disk |
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| Meaning | An operating system that is on a disk. | |
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| Synonym | DOS | |
| Instances | MS-DOS, Microsoft disk operating system | An operating system developed by Bill Gates for personal computers |
| Broader | operating system, OS | (computer science) software that controls the execution of computer programs and may provide various services |