Automation System
The use of specialized workstations:

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

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Automation System
Digital signals:

None of these
have a frequency measured in units of hertz
can have three possible levels
have a sinusoidal shape.
are assigned values of 1 or 0 depending on the voltage level

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