Automation System
One of the following is not considered a method of input control in a CAD system.

Joystick
Touch terminal
None of these
Programmable function box
Plotter

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Automation System
An aneroid barometer

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

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Automation System
Stepping motors:

do not require commutators
All of these
can run at varying speeds
can be built to index different amounts by changing the pole configuration
can run both clockwise and counterclockwise

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