Automation System
Historically, central systems were used because:

All of these
memory consumed a large amount of power
None of these
memory was very expensive
semiconductor memory was not available

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Automation System
The "walk-through" method of programming a robot involves:

All of these
physically moving the robot through all the motions it is to repeat
moving the robot from one location to another
None of these
walking through your suggested procedure with your supervisor prior to programming

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