Automation System
The computer graphics system called SKETCHPAD was demonstrated at

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

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Automation System
Stepping motors:

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

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Automation System
The SKETCHPAD system

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

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