Automation System
Operator interaction directly with the CRT is accomplished via:

vector scanning
None of these
a stylus
a touch terminal
a digitizing tablet

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Automation System
Programmable controllers:

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

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Automation System
An operating system:

is useless in most control applications
provides ability for other programmers to understand the software structure
None of these
All of these
can help reduce software development time

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