Files with DWG extension represent proprietary binary files used for containing 2D and 3D design data. Like DXF, which are ASCII files, DWG represents the binary file format for CAD (Computer Aided Design) drawings. It contains a vector image and metadata for the representation of the contents of CAD files.
Files with .POT extension represent Microsoft PowerPoint template files created by PowerPoint 97-2003 versions. Files created with these versions of Microsoft PowerPoint are in binary format as compared to those created in Office OpenXML file formats using the higher versions of PowerPoint. The files, hence, generated can be used to create presentations that have the same layout and other settings required to be applied to new files. These settings can include styles, backgrounds, color palettes, fonts, and defaults.
You can also convert DWG into many other file formats. Please see the complete list below.