CAD

PTC Creo 
     Creo CAD Guidebook
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Tinkercad
     A fun, free online program for designing simple 3D models
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PTC Windchill
     Putting parts directly into the CAD directory

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TIPS AND TRICKS:   PHONES  ;  ENGINEERING NOTEBOOK  ;   CAD  ;  WIRING  ;  3-D PRINTING  ;  PROGRAMMING