Automation System
The SKETCHPAD system

None of these
is used for interactive Graphics
All of these
consisted of an cathode-ray oscilloscope driven by a Lincoln Tx2 computer where by graphical information was displayed on the screen.
is expensive because it is sophisticated and make demands on the power and resources of the computer.

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Automation System
Straight-line operations:

must be parallel to one of the axes of the coordinate system
None of these
must be limited to two per workpiece
All of these
can include diagonal cuts if they aren't curved

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