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

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

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Automation System
Stepping motors:

can run both clockwise and counterclockwise
All of these
can be built to index different amounts by changing the pole configuration
can run at varying speeds
do not require commutators

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Automation System
A venturi tube:

can be used to measure gas or liquid flow rates
measures the presence of a liquid
is extremely difficult to use
None of these
is made only of metal

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