This specifies that the symbols Div, Grad and Curl are defined in:
Calculus`VectorAnalysis`
Thus by typing the commands Div, Grad or Curl Mma will not
complain and automatically load the package containing those commands.
The question is:
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Has anyone by chance made the proper modifications to (I believe the init.m file) or know of an easy way to tell Mma where all the commmands are in there respective packages so no matter what command a student types it will automatically load that package for them?