DGN files are drawings created by and supported by CAD applications such as MicroStation and Intergraph Interactive Graphics Design System. It is used for creating and saving designs for construction projects such as highways, bridges, and buildings. The format is similar to Autodesk’s DWG file format and is considered its competitor.
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 DGN into many other file formats. Please see the complete list below.