Operating System (OS)
The Memory Address Register

contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write".
is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.
is a hardware memory device which denotes the location of the current instruction being executed.
contains the address of the memory location that is to be read from or stored into.
None of these

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Operating System (OS)
The advantage(s) inherent to using high level languages is (are)

All of these
Fewer people, less management and shorter transition in learning time
A greater degree of machine independence
None of these
Improved debugging capability, and superior documentation

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