Automation System
An aneroid barometer

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

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Automation System
A sequence controller:

None of these
is difficult to program
is no longer in widespread use
is a mechanical only controller
performs on/off control functions in relation to time.

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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 expensive because it is sophisticated and make demands on the power and resources of the computer.
All of these
is used for interactive Graphics

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