This Architectural Drawing of AutoCAD 2d drawing of ISAT RF ANTENNA Drawing of AutoCAD. DWG is the proprietary native file format for AutoCAD, one of the most popular computer-assisted design (CAD) packages. The format is maintained by AutoDesk. DWG is a compact binary format that stores and describes the content of 2D and 3D design data and metadata. Because CAD files are saved on some form of digital storage media – either a local hard drive, a shared network drive or (if transferring data) an email server or USB drive – the odds of files being overwritten, lost, stolen or corrupted are stacked against you. For more details and information download the drawing file.