Automation System
Today, programmable controllers:

are relatively low cost compared with the original digital equipment available for industrial control
None of these
are more powerful then the first controllers on the market
can be cost effective even when replacing just a few relays
All of these

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

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

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