Which of the following is an example of Single user/Single tasking OS?

Which of the following is an example of Single user/Single tasking OS? Correct Answer DOS

Single - User/Single - Tasking OS An operating system that allows a single user to perform only one task at a time is called a Single - User Single - Tasking Operating System. Functions like printing a document, downloading images, etc., can be performed only one at a time. Examples include MS - DOS, Palm OS, etc.
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