Automation System
The use of specialized workstations:

reduces the host computer workload
reduces the host computer workload and allows more users
provides limited growth potentials for 3-D
None of these
has a high cost-performance tradeoff

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Automation System
Time proportioning control:

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

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