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.
is used for interactive Graphics
None of these
All of these
is expensive because it is sophisticated and make demands on the power and resources of the computer.

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Automation System
Time proportioning control:

can be used on a PM550 programmable process controller
None of these
cannot use a TM990 micro¬computer
is less efficient than normal PID control
a and b above.

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Automation System
Most industrial control applications:

can be solved using more than one method of control
All of these
must have the process specified correctly to be successful
can be done more reliably using solid-state methods
None of these

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