A large company such as a retail store or airline reservation system uses a multi-user computer that acts as the central computer in a network.
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Multi-user computer</h3>
A multi-user operating system (OS) is a computer system that allows multiple users from different computers to have access to a single system's OS resources at the same time.
A mainframe is a multi-user computer capable of connecting hundreds or thousands of users simultaneously. This are used by large companies.
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Answer: the answer is A.
Explanation: hope this helps!
Action Buttons An action button is a ready-made button that you can insert into your presentation and define hyperlinks. Use action buttons when you want to include buttons with commonly understood symbols for going to the next, previous, first, and last slides.
Answer:
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2. a. Show him how to find System Summary data in the System Information utility in Windows and then do online research.
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