Operating System (OS)
A program

is the device where information is stored
None of these
is typically characterized by interactive processing and time of the CPU
is a device that performs a sequence of operations specified by instructions in memory.
is a sequence of instructions

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Operating System (OS)
Addressing modes

All of these
defines the fundamental method of determining effective operand addresses
None of these
are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.
performs indicated operations on two fast registers of the machine and leave the result in one of the registers.

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