Automation System
The computer graphics system called SKETCHPAD was demonstrated at

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

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Automation System
Straight-line operations:

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

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