Automation System
Stepping motors:

can run at varying speeds
can run both clockwise and counterclockwise
do not require commutators
can be built to index different amounts by changing the pole configuration
All of these

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Automation System
Most industrial control applications:

None of these
All of these
can be solved using more than one method of control
must have the process specified correctly to be successful
can be done more reliably using solid-state methods

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