what is a computer based system that allows people to communicate simoltaneously from differetn locations

Electronic conferencing

Explanation:

Electronic conferencing is a form of a computer-based system that allows people to communicate simultaneously from different locations, with the aid of the Internet, which can be done through telephones, emails, or video chats. It is a commonly known Virtual Meeting.

Hence, the right answer, based on the definition or description given in the question is ELECTRONIC CONFERENCING

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