Automation System
A drum timer is a good example of:

an input sensor
a position sensor
an output actuator
a sequence controller
None of these

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Automation System
The SKETCHPAD system

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

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