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DGN

A DGN file is a 2D/3D drawing created by MicroStation or Intergraph Interactive Graphics Design System. Such files are typically used to save designs for construction projects for highways, bridges, and buildings.

ACIS

ACIS geometric modeling kernel is used by many software developers in industries such as computer-aided design (CAD), computer-aided manufacturing (CAM), computer-aided engineering (CAE), architecture, engineering and construction (AEC), coordinate-measuring machine (CMM), 3D animation, and shipbuilding. ACIS has also been used as the foundation of the Shape Manager kernel used by Autodesk in its applications. So the ACIS format is a preferred file format when exchanging data with Autodesk apps.

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