Automation System
Programmable controllers:

are widely used in many different industries
None of these
are programmed using relay ladder logic
cannot perform functions other than relay logic
(a) and (c) above

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Automation System
The computer graphics system called SKETCHPAD was demonstrated at

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

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