Operating System (OS)
You can switch from one program to another on the desktop by clicking within the desired program's window or by clicking on its ...... button

Taskbar button
Icon
Folder
None of above

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Operating System (OS)
Multiprogramming systems:

execute more jobs in the same time period
None of these
are used only on large mainframe computers
are easier to develop than single programming system
execute each job faster

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