Question: 9.3 Using the level 1 DFD for System Telecom and other case study information, what are the major entities of the Customer Services System? There

9.3 Using the level 1 DFD for System Telecom and other case study information, what are the major entities of the Customer Services System?

There are more entities than this, so how have you chosen to identify the major ones? A good place to start is to list the criteria for identifying entities.

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