Interesting. I'm pretty sure AutoCAD is a restricted export; the Iranians aren't supposed to have it at all.
Well mate it depends on the version of Autocad you are using the high end maybe restricted but other versions that are older can be easily obtained. Plus even the older versions are still pretty good for engineering jobs. The newer versions are made so they are more user friendly compared to the older one where you have to go through like ten commands just to pick a specifc point on the design graph.