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| Extension | File Type Developer | File Category | File Type Description | Software | Software Developer |
|---|---|---|---|---|---|
| .BCA | Nemetschek Group | Backup Files | Allplan Backup Catalog File | Allplan Engineering | Nemetschek Group |
| .CLX | IBM | Data Files | Rational XDE | VectorWorks | Nemetschek Group |
| .IGES | Redway3d and others | 3D Image Files | IGES Exchange Format | VectorWorks | Nemetschek Group |
| .IGS | United States Air Force | CAD Files | Initial Graphics Exchange Specification Drawing File | VectorWorks | Nemetschek Group |
| .NDW | Nemetschek Group | 3D Image Files | Allplan Engineering File | Allplan Engineering | Nemetschek Group |
| .NPL | Nokia | Data Files | Nokia Playlist File | Allplan Engineering | Nemetschek Group |
| .VSS | The Omni Group | Raster Image Files | Visio Stencil File | VectorWorks | Nemetschek Group |
| .VWX | Nemetschek Group | CAD Files | Vectorworks Design File | VectorWorks | Nemetschek Group |
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