Automation System
A common data base is one requisite for converting CAD and CAM to CIM. Another is that:

there should be a common 3-D part description system.
the user must have access to both hardware and software
None of these
the system must make provision for new techniques.
technical assistance must be provided to the user.

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Automation System
Digital signals:

can have three possible levels
have a sinusoidal shape.
are assigned values of 1 or 0 depending on the voltage level
None of these
have a frequency measured in units of hertz

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Automation System
Sensors:

are easily developed
probably will not improve over the next decade
None of these
are not important in automation
will be much smarter and more sophisticated in the future

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