AutoCAD has been the industry standard since the move away from drawing boards started.
As such we it is still part of our standard package of tools, being versatile and efficient on any project. ┬áBeing the most common format in the CAD industry it is generally accepted in all drafting and design offices.
In house we have the ability to convert between PDF and AutoCAD DWG files giving us flexibility to import a wider range of information, also including scanning paper drawings.
Your 3D models can either be produced in AutoCAD or Trimble/Google Sketchup Pro.