Automation System
The program execution time:

All of these
must be slower than the fastest mechanical operation that is to be controlled
cannot be changed once the program is written
None of these
will vary depending on the language used

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Automation System
An operating system:

can help reduce software development time
All of these
None of these
is useless in most control applications
provides ability for other programmers to understand the software structure

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Automation System
The program counter:

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

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