AutoDesk USA Website
http://usa.autodesk.com/
http://labs.autodesk.com/
Cad Digest
http://www.caddigest.com/subjects/autocad/index.htm
AutoCAD 2013 2d drawing videos
http://www.youtube.com/playlist?list=PLvFYwxhh980YgD3_Zsfhi7HAJGjkf5X7b
AutoCAD 2013 3d drawing videos
http://www.youtube.com/playlist?list=PLvFYwxhh980al4B9oihpZWompt_xrVAmn
http://usa.autodesk.com/
http://labs.autodesk.com/
Cad Digest
http://www.caddigest.com/subjects/autocad/index.htm
AutoCAD 2013 2d drawing videos
http://www.youtube.com/playlist?list=PLvFYwxhh980YgD3_Zsfhi7HAJGjkf5X7b
AutoCAD 2013 3d drawing videos
http://www.youtube.com/playlist?list=PLvFYwxhh980al4B9oihpZWompt_xrVAmn