Automation System
The concept of a general CAD system was that it should provide:

All of these
A set of basic system functions and utilities.
A system for handling user actions.
A system for the operation of applications programming.
None of these

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Automation System
Time proportioning control:

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

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Automation System
Sensors:

are easily developed
are not important in automation
None of these
will be much smarter and more sophisticated in the future
probably will not improve over the next decade

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