3D:
This extension can be one of the following:
- Advent 3B2 Document
- Al-Arabi Publisher Document
- Atari Stereo CAD-3D Objects Graphics Format
- Cadwork 3D CAD File (cadwork AG)
- Geocadabra
- i3D Browser File (Center for Advanced Studies, Research and Development in Sardinia)
- SpinFire Professional Secure 3D Format CAD File (Actify, Inc.)
- VersaCAD 3D Drawing File
