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The ‘IBM-DOS’ is a
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- Single-user operating system
- Multiuser operating system
- Batch operating system
- Time-sharing operating system
Correct Option: A
Alternatively referred to as PC DOS, IBM DOS is a text-based operating system similar to Microsoft’s DOS, but only sold by IBM. DOS is a single-user, single-tasking operating system with basic kernel functions that are non-reentrant: only one program at a time can use them and DOS itself has no functionality to allow more than one program to execute at a time.