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

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

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Automation System
Direct Numerical Control means:

using several computers to control one large machine
None of these
using one computer to control several machines
complete elimination of a need for a human operator.
eliminating computers from the manufacturing process

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Automation System
An operating system:

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

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