Automation System
Today, programmable controllers:

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

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Automation System
The main function(s) of computer in CAD is/are

None of these
To serve as an extension to the memory of the designer
All of these
To enhance the analytical and logical power of the designer
To relieve the designer from routine repetitious tasks.

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