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
Queue of print job that are waiting to print
Location in memory that maintains the contents of documents until it prints

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Operating System (OS)
Trojan-Horse programs

are legitimate programs that allow unauthorized access
None of these
do not usually work
are hidden programs that do not show up on the system
usually are immediately discovered

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