Automation System
Today, programmable controllers:

can be cost effective even when replacing just a few relays
All 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
None of these

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

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

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