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

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

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Automation System
An encoder:

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

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