CAD software??? which CAD software is mostly used by professional engineers??? i have worked on UGS NX3, Dassault Systems solid works, Dassault System Catia V5R16, PTC Pro E. i work really well on NX3 and catia(according to me only, though), not much on solid works and i am currently going through Pro E. i havent ever used any autodesk software like autocad or inventor(though i have inventor). so which software is mostly used by professional engineers? and this sounds silly, which one is more advantageous to learn(i know the standard answer)??