Visit Autodesk on the Web

The Autodesk Inc. at http://www.autodesk.com
The AutoCAD Home Page at http://www.autodesk.com/products
Autodesk Product Support Services Web site at http://www.autodesk.com/support/
Visit the AutoCAD Plug-in Store at http://cadplugins.beyond.com/
Looking for an add on applications? Visit Autodesk's 3rd Party Developer guide, the Autodesk Resource Guide Online