Automation System
Stepping motors:

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

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Automation System
The program counter:

contains the address of the next instruction to be executed
counts the number of instructions that have been executed
decides which program to run
is where arithmetic is done in a computer.
None of these

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