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

Joystick
Plotter
Programmable function box
Touch terminal
None of these

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Automation System
Programmable controllers:

are widely used in many different industries
None of these
(a) and (c) above
cannot perform functions other than relay logic
are programmed using relay ladder logic

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Automation System
A process controller:

can solve a PID process control equation easily
None of these
can interface to digital and analog I/O
All of these
is useful in a continuous process control application

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