Operating System (OS)
Operating system

enables the programmer to draw a flowchart
All of these
links a program with the subroutines it references
None of these
provides a layered, user-friendly interface

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Operating System (OS)
Addressing modes

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

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