Automation System
The concept of a general CAD system was that it should provide:

All of these
A system for the operation of applications programming.
None of these
A system for handling user actions.
A set of basic system functions and utilities.

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Automation System
An encoder:

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

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Automation System
A process controller:

can interface to digital and analog I/O
is useful in a continuous process control application
None of these
All of these
can solve a PID process control equation easily

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