hi to all experts,I would like to clear my concept while defining appropriate units for my drawing.I am using AutoCAD 2010 in this regard while defining units  i m not gettingunderstand the Definition of Decimal & Decimal Degree. Can anybody tell me or make me understand with any example.I will be highly obliged............Irfan Khan

Hello, Decimal is for distances and Decimal Degree is for angles.
 
These units that you set with DDUNITS are for the informations that you can get on your drawing when you do a LIST or a MASSPROP for example.
 
You will have to set the informations that you will get on the dimensions that you want to print in the DDIM panel. 

Thanks.....................;)