||Proprietary (Bentley Systems)
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"DGN" is short for design and is a CAD format used by Bentley Systems MicroStation and Intergraph Interactive Graphics Design System. DGN files may contain 2D or 3D designs.
MicroStation is an architectural and engineering software program. It is used primarily for large design projects, such as building, highway, and bridge construction.
Bentley Systems Bentley View
Bentley Systems MicroStation
||July 1, 2009
Information from the PC File Extensions Reference