Automation System
Today, programmable controllers:

None of these
are relatively low cost compared with the original digital equipment available for industrial control
are more powerful then the first controllers on the market
All of these
can be cost effective even when replacing just a few relays

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Automation System
Microcomputer-based control sys-tems

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

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