What is the difference between the full version of AutoCAD v.14 and AutoCAD LT?
AutoCAD LT is a 2D only software tool. It does not have any of the 3D commands. Neither can it be customized, which means 3rd party software, such as Softdesk Architectural, that is supposed to run with AutoCAD cannot be used with AutoCAD LT. The only version of AutoCAD LT 97 is the only version that is 100% compatible with version 14 AutoCAD. Previous versions of AutoCAD LT such as AutoCAD LT95, can be used with version 14, however, there may be some data that cannot be converted between LT95 and version 14. Additional details are available from Autodesk.