Automation System
Programmable controllers:

None of these
(a) and (c) above
are widely used in many different industries
cannot perform functions other than relay logic
are programmed using relay ladder logic

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Automation System
Microcomputer-based control sys-tems

will just keep their present capability
None of these
All of these
will have more standard industrial application software available in the future.
will tend to increase in cost.

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