Automation System
The SKETCHPAD system

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

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Automation System
What is the difference between integral and derivative control?

derivative control responds to a change in the rate of change in the error signal
derivative control does not eliminate offset error
None of these
integral control has slower response to an error signal.
All of these

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