Operating System (OS)
A spooler is a

Message sent from the printer to the operating system when a print job is completed
Program that coordinates the print job that are waiting to process
Location in memory that maintains the contents of documents until it prints
Queue of print job that are waiting to print

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Operating System (OS)
Multiprogramming systems:

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

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