Automation System
Today, programmable controllers:

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

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

To serve as an extension to the memory of the designer
None of these
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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