| .ATC | Autodesk, Inc. | Einstellungsdateien | AutoCAD Tool Catalog File | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .CLT | Clarity Legal | Seitenlayoutdateien | Clarity Legal Transcript File | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .COF | Microchip Technology Inc. | Ausführbare Dateien | MPLAB COFF File | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .DAB | Epigon Media Technologies | Audiodateien | Digital Audio Broadcasting Audio Data | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .DCN | Autodesk, Inc. | Einstellungsdateien | Autodesk Depth Slope Definition | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .DFM | Open Source | Textdateien | Pascal File | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .FBK | Microsoft Corporation | Backupdateien | Microsoft Dynamics NAV Backup File | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .HDC | TCD Labs | Textdateien | HD Tach Benchmark Results | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .HTP | Autodesk, Inc. | CAD-Dateien | Autodesk Slope Template Definition | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .ICN | Microsoft Corporation | Rasterbilddateien | Windows Icon File | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .INP | Concept Software | Seitenlayoutdateien | Urdu InPage Document | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .LK# | Autodesk, Inc. | CAD-Dateien | Autodesk Multi-User Coordination Lock Data | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .PDA | Molecular Devices | Textdateien | SoftMax Pro Microplate Data Analysis File | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .PFB | Adobe Systems Incorporated | Fontdateien | Printer Font Binary File | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .PSP | Corel Corporation | Rasterbilddateien | PaintShop Pro Image | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .RAT | World Wide Web Consortium (W3C) | Sonstige Dateien | PICS Rating File | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .RTC | Brain Innovation | Textdateien | BrainVoyager QX Design Matrix File | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .SDC | Stardock Corporation | Backupdateien | Stardock Central Download Archive | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .SDF | Microsoft Corporation | Datenbankdateien | SQL Server Compact Database File | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .SHX | Autodesk, Inc. | CAD-Dateien | AutoCAD Compiled Shape File | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .SLP | Magix Software GmbH | Audiodateien | SpectraLayers Pro Project | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .SSC | Microsoft Corporation | Entwicklerdateien | SourceSafe Status File | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .TBL | Blizzard Entertainment Inc. | Textdateien | StarCraft Information Table | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .TDF | DVD Copy | Einstellungsdateien | Title Definition Format File | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .XSP | Open Source | Audiodateien | Kodi Smart Playlist File | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
| .XTP | adnx | Textdateien | xTime Project Document | Autodesk AutoCAD Civil 3D | Autodesk, Inc. |
von 1 
