Automation System
An aneroid barometer

None of these
is very unreliable
can be used to measure gas or liquid flow rates
measures pressure by sensing deflection of an evacuated chambers.
can measure only atmospheric pressure

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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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