Download AutoCAD 2006
As usual, I’ve run out of room long before I can extol or even list all the new features in AutoCAD 2006. For example, how about the fact that view transitions such as zooming and 3D rotating can now flow smoothly from view to view? This makes it much easier to stay oriented in the drawing.

www.websoft.ws/P43/CAD_Systems/AutoCAD_2006.html