Automation System
The difference between CAD and CAM is that CAD software is directed at product design while CAM software is:

concerned with production and control of tool design
specifically for PC-board design
None of these
designed for communications
concerned with management programs

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Automation System
An operating system:

All of these
provides ability for other programmers to understand the software structure
is useless in most control applications
None of these
can help reduce software development time

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