Automation System
Digitizers can be converted from "dumb" to "smart" through the addition of:

an electromagnetic coupling
keyboard
a microprocessor
a scanner
None of these

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Automation System
A stepping motor;

is a good choice where continuous rotation is needed
has a commutator
can index positional movement.
has a speed proportional to voltage input
None of these

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Automation System
Semiconductor devices:

All of these
have a very short infant mortality period
usually have a very short MTBF (mean time between failure)
None of these
are less reliable than electro¬mechanical components

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