Automation System
Digitizers can be converted from "dumb" to "smart" through the addition of:

a scanner
a microprocessor
keyboard
None of these
an electromagnetic coupling

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Automation System
An encoder:

converts an input to a binary number
is used to send telegraph signals
can have only four keys
converts a binary number to a decimal number.
None of these

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Automation System
Trend analysis:

can improve control system response
is a brand new concept
is used only in financial planning
requires a very expensive system to implement
None of these

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