Question

who allows two or more users to work on single computer at same or different time​

Answer 1

Answer:

main frame computer

Explanation:

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Answer 2

Explanation:

Operating systems can be classified as follows:

multi-user: Allows two or more users to run programs at the same time. Some operating systems permit hundreds or even thousands of concurrent users.

multiprocessing: Supports running a program on more than one CPU.

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