Automation System
The SKETCHPAD system

None of these
consisted of an cathode-ray oscilloscope driven by a Lincoln Tx2 computer where by graphical information was displayed on the screen.
is expensive because it is sophisticated and make demands on the power and resources of the computer.
is used for interactive Graphics
All of these

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

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
To enhance the analytical and logical power of the designer

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