Discussion
___________allows more than one program to run concurrently.
Answer: D
The feature is multitasking.
A multitasking operating system lets more than one program (task) run concurrently on the same computer. The processor switches rapidly between tasks, giving each a short slice of time, so a user can, for example, type a document while music plays and a file downloads.
Multi user means several users can use the system at the same time, which is about users, not programs. Multiprocessing means the computer has more than one processor, which is hardware rather than the ability to run several programs. A switching system is a telecommunication term.
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