Operating System (OS)
The Storage-to-Storage instructions

have both their operands in the main store.
None of these
which perform an operation on a register operand and an operand which is located in the main store, generally leaving the result in the register, expect in the case of store operation when it is also
All of these
which perform indicated operations on two fast registers of the machine and have the result in one of the registers

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Operating System (OS)
A spooler is a

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

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