| File Extension: | C18 |
| File Type Description: | Dassault Systemes Catia V4 Sequential File |
| File Type Developer: | Dassault Systèmes |
| Primary Associated Software: | Dassault Systemes CATIA |
| Primary Software Developer: | Dassault Systèmes |
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Dassault Systèmes developed the Dassault Systemes Catia V4 Sequential File file type when the Dassault Systemes CATIA was initially released. Internal website statistics show that C18 files are most popular with users in Japan and those running the Windows 10 operating system. Google Chrome is the predominant internet browser used by this population.
 | Dassault Systemes CATIA by Dassault Systèmes |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Linux |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .IGS | United States Air Force | CAD Files | Initial Graphics Exchange Specification Drawing File |
| .3DREP | Dassault Systèmes | Data Files | CATIA 3D Geometry Data |
| .EPRT | Dassault Systèmes | CAD Files | eDrawings File |
| .XPR | Parametric Technology Corporation | 3D Image Files | Pro/ENGINEER Part Instance Accelerator File |
| .MO | Dassault Systèmes | Data Files | Dymola Simulation File |
| .INP | Concept Software | Page Layout Files | Urdu InPage Document |
| .ODB | Various Developers | Database Files | OpenDocument Database |
| .CATFCT | Dassault Systèmes | CAD Files | CATIA CATfct Data File |
| .PLB | Microsoft Corporation | Data Files | Microsoft Robotics Developer Studio Playback Data |
| .EASMX | Dassault Systèmes | Page Layout Files | SolidWorks eDrawings XPS Assembly File |
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