Automation System
The device that assembles groups of characters into complete messages prior to their entering the CPU is called:

a compiler
an interpreter
an editor
None of these
a communications processor

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Automation System
The use of specialized workstations:

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

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Automation System
Time proportioning control:

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

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