Automation System
The difference between CAD and CAM is that CAD software is directed at product design while CAM software is:

concerned with production and control of tool design
concerned with management programs
None of these
specifically for PC-board design
designed for communications

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Automation System
Most industrial control applications:

must have the process specified correctly to be successful
All of these
can be done more reliably using solid-state methods
None of these
can be solved using more than one method of control

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

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

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