Automation System
The computer graphics system called SKETCHPAD was demonstrated at

None of these
Cranfield Institute of Technology, London, 1962
Massachusetts Institute of Technology in 1963
University of Aston, Birmingham, 1960
Imperial college of Science and Technology, London, 1973

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Automation System
Straight-line operations:

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

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