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

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

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Automation System
Direct Numerical Control means:

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

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