D |
 |
| DXF | AutoCAD File Exchange format (ascii format ). |
| DWG | AutoCAD File format (binary format ). Both DXF and DWG Files have the same content but under a different format. |
I |
|
| IGES | The Initial Graphic Exchange Specification (IGES) format, is a neutral format to transfer data between heterogeneous CAD systems. |
S |
|
| STEP | STEP AP203 / AP214 formats (Standard for the Exchange of Product model data) |