Automation System
The program counter:

decides which program to run
is where arithmetic is done in a computer.
None of these
counts the number of instructions that have been executed
contains the address of the next instruction to be executed

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Automation System
A semi-continuous operation means:

a computer is a required part of the machine
coffee breaks are allowed for the operator
each operation in a sequence is continuous, but subsequent operations in the sequence may be different.
None of these
the operation is continuous each shift, but stops between shifts

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