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| Extension | File Type Developer | File Category | File Type Description | Software | Software Developer |
|---|---|---|---|---|---|
| .3FX | Corel | Settings Files | Corel Chart 3D Effect | CorelDRAW Graphics Suite | Corel |
| .91 | Corel | Font Files | Ventura Publisher 91x91 DPI Display Font | Ventura Publisher | Corel |
| .A00 | Robert K. Jung | Compressed Files | Split Multi-volume ARJ Compressed File Archive | WinZip | Corel |
| .A01 | Robert K. Jung | Compressed Files | Split Multi-volume ARJ Compressed File Archive | WinZip | Corel |
| .A02 | Robert K. Jung | Compressed Files | Split Multi-volume ARJ Compressed File Archive | WinZip | Corel |
| .A03 | Robert K. Jung | Compressed Files | Split Multi-volume ARJ Compressed File Archive | WinZip | Corel |
| .A04 | Robert K. Jung | Compressed Files | Split Multi-volume ARJ Compressed File Archive | WinZip | Corel |
| .A05 | Robert K. Jung | Compressed Files | Split Multi-volume ARJ Compressed File Archive | WinZip | Corel |
| .A06 | Robert K. Jung | Compressed Files | Split Multi-volume ARJ Compressed File Archive | WinZip | Corel |
| .A07 | Robert K. Jung | Compressed Files | Split Multi-volume ARJ Compressed File Archive | WinZip | Corel |
| .A08 | Robert K. Jung | Compressed Files | Split Multi-volume ARJ Compressed File Archive | WinZip | Corel |
| .A09 | Robert K. Jung | Compressed Files | Split Multi-volume ARJ Compressed File Archive | WinZip | Corel |
| .A10 | Robert K. Jung | Compressed Files | Split Multi-volume ARJ Compressed File Archive | WinZip | Corel |
| .A11 | Robert K. Jung | Compressed Files | Split Multi-volume ARJ Compressed File Archive | WinZip | Corel |
| .A32 | Robert K. Jung | Compressed Files | Split Multi-volume ARJ Compressed File Archive | WinZip | Corel |
| .AB3 | Ulead Systems | Data Files | PhotoImpact 3 Album File | PhotoImpact | Corel |
| .ABK | Corel | Backup Files | Automatic Backup File | CorelDRAW Graphics Suite | Corel |
| .ABX | Corel | Database Files | WordPerfect Address Book | Corel WordPerfect X8 | Corel |
| .ADOC | Stuart Rackham | 3D Image Files | AsciiDoc File | Corel WordPerfect | Corel |
| .AF2 | iGrafx | Vector Image Files | Micrografx ABC FlowCharter 2 File | iGrafx Designer | Corel |
| .AF3 | iGrafx | Vector Image Files | Micrografx ABC FlowCharter 3/4 File | iGrafx Designer | Corel |
| .AFW | iGrafx | Settings Files | Micrografx FlowCharter Work Area Data | iGrafx Designer | Corel |
| .AFX | Auto FX Software | Raster Image Files | Auto FX PhotoGraphic Edges Image | Corel Painter | Corel |
| .AI | Adobe Systems Incorporated | Vector Image Files | Adobe Illustrator File | CorelDRAW Graphics Suite | Corel |
| .AI4 | Adobe Systems Incorporated | Vector Image Files | Encapsulated PostScript File | Corel Presentations X8 | Corel |
| .ALL | Steinberg | Audio Files | Cubase Project | Corel WordPerfect | Corel |
| .ALT | Microsoft Corporation | Uncommon Files | Dynamics AX Temporary File | Corel WordPerfect | Corel |
| .AOB | Unknown Developer | Audio Files | DVD-Audio Audio Object File | Corel WinDVD | Corel |
| .APK | Compressed Files | Android Package File | WinZip | Corel | |
| .AR | Microsoft Corporation | Game Files | Midtown Madness Data File | Corel WinZip 21 | Corel |
| .ARC | Symantec Corporation | Backup Files | Norton Backup Archive | Corel WinZip 21 | Corel |
| .ARS | Adobe Systems Incorporated | Settings Files | After Effects Render Settings File | Corel WordPerfect | Corel |
| .ART | Autodesk, Inc. | CAD Files | ArtCAM Model | CorelDRAW Graphics Suite | Corel |
| .ASP | Microsoft Corporation | Web Files | Active Server Page | Corel WordPerfect | Corel |
| .ATT | Unknown Developer | Web Files | Web Form Post Data File | Corel WordPerfect X8 | Corel |
| .B64 | Smith Micro Software | Compressed Files | Base64 MIME-Encoded File | Corel WinZip 21 | Corel |
| .B8 | Open Source | Raster Image Files | Bitmap Picture File | PaintShop Pro | Corel |
| .BAK | Various Developers | Backup Files | General Backup File | Corel WordPerfect X8 | Corel |
| .BBS | Open Source | Text Files | Bulletin Board System Text | Corel WordPerfect | Corel |
| .BE | Corel | Data Files | Paradox Query-By-Example Query | Corel Paradox | Corel |
| .BED | University of California, Santa Cruz (UCSC) | Data Files | UCSC BED Annotation Track File | Corel WordPerfect | Corel |
| .BIN | Unknown Developer | Disk Image Files | Binary Disk Image File | WinZip | Corel |
| .BK! | Corel | Backup Files | Corel WordPerfect Document Backup File | Corel WordPerfect | Corel |
| .BK3 | Corel | Backup Files | Corel WordPerfect Document Backup File | Corel WordPerfect | Corel |
| .BK4 | Corel | Backup Files | Corel WordPerfect Document Backup File | Corel WordPerfect | Corel |
| .BK6 | Corel | Backup Files | Corel WordPerfect Document Backup File | Corel WordPerfect | Corel |
| .BK8 | Corel | Backup Files | Corel WordPerfect Document Backup File | Corel WordPerfect | Corel |
| .BK9 | Corel | Backup Files | Corel WordPerfect Document Backup File | Corel WordPerfect | Corel |
| .BMF | IMSI/Design, LLC | CAD Files | FloorPlan File | Corel Gallery | Corel |
| .BPT | Corel | Raster Image Files | CorelDRAW Bitmap Master Data | CorelDRAW Graphics Suite | Corel |
| .BRT | DAZ 3D | Raster Image Files | Bryce Textures File | Micrografx Picture Publisher | Corel |
| .BUP | Various Developers | Backup Files | Backup File | Corel WinDVD | Corel |
| .BV2 | Corel Corporation | Temporary Files | Corel WordPerfect Overflow File | Corel WordPerfect X8 | Corel |
| .BV3 | Corel Corporation | Temporary Files | Corel WordPerfect Overflow File | Corel WordPerfect X8 | Corel |
| .BV4 | Corel Corporation | Temporary Files | Corel WordPerfect Overflow File | Corel WordPerfect X8 | Corel |
| .BV6 | Corel Corporation | Temporary Files | Corel WordPerfect Overflow File | Corel WordPerfect X8 | Corel |
| .BV7 | Corel Corporation | Temporary Files | Corel WordPerfect Overflow File | Corel WordPerfect X8 | Corel |
| .BVL | Corel | Settings Files | Micrografx Picture Publisher 8 Textures File | Micrografx Picture Publisher | Corel |
| .BZ2 | Julian Seward | Compressed Files | Bzip2 Compressed File | Corel WinZip 21 | Corel |
| .CAB | Microsoft Corporation | System Files | Windows Cabinet File | Corel WinZip 21 | Corel |
| .CAL | Newera Software Technology, Inc. | Raster Image Files | CALS Raster File | CorelDRAW Graphics Suite | Corel |
| .CALS | Newera Software Technology, Inc. | Raster Image Files | CALS Raster File | CorelDRAW Graphics Suite | Corel |
| .CCH | Microsoft Corporation | Uncommon Files | .NET Security Resolution Cache File | Corel Chart | Corel |
| .CCK | U.S. Department of Energy | Data Files | COMcheck Data File | CorelDRAW Graphics Suite | Corel |
| .CCX | Clickteam | Plugin Files | Click & Create Extension | CorelDRAW Graphics Suite | Corel |
| .CDR | Corel | Vector Image Files | CorelDRAW Vector Image File | PaintShop Pro | Corel |
| .CDT | Sony | Disk Image Files | CD-Text File | Corel Presentations X8 | Corel |
| .CDX | Microsoft Corporation | Data Files | Compound Index File | CorelDRAW Graphics Suite | Corel |
| .CFL | Corel Corporation | Uncommon Files | Corel Flow Flow Chart File | Corel WordPerfect | Corel |
| .CFT | Walt Disney Animation Studios | Graphic Files | CFast Graphics | CorelDRAW Graphics Suite | Corel |
| .CH3 | Harvard Graphics | Page Layout Files | Harvard Graphics DOS Chart File | Corel Presentations X8 | Corel |
| .CHP | Corel Corporation | Data Files | Ventura Publisher Chapter Document | Ventura Publisher | Corel |
| .CIK | Corel | Settings Files | Corel Graphics 10 Custom Dual Tone File | CorelDRAW Graphics Suite | Corel |
| .CKO | Corel | Graphic Files | Image Mask File | Corel KnockOut 2 | Corel |
| .CLK | Corel | Data Files | Corel R.A.V.E Project File | CorelDRAW Graphics Suite | Corel |
| .CLY | Corel | Settings Files | CorelDRAW Custom Layout | CorelDRAW Graphics Suite | Corel |
| .CMD | Microsoft Corporation | Executable Files | Windows Command File | Corel WordPerfect | Corel |
| .CMP | Microsoft Corporation | Settings Files | Windows Connection Manager Profile | CorelDRAW Graphics Suite | Corel |
| .CMX | Corel | Vector Image Files | Corel Metafile Exchange Image File | Corel Presentations X8 | Corel |
| .CMY | Corel Corporation | Data Files | CorelDRAW Custom File | CorelDRAW Graphics Suite | Corel |
| .COR | Trimble Inc. | GIS Files | Trimble Corrected SSF File | CorelDRAW Graphics Suite | Corel |
| .COREL WORDPERFECT DICTIONARY | Corel | Data Files | Corel WordPerfect Dictionary File | Corel WordPerfect X8 | Corel |
| .COS2 | Pinnacle Systems Inc. | Uncommon Files | Pinnacle Studio Cache File | Pinnacle Studio | Corel |
| .CPD | Adobe Systems Incorporated | Data Files | RoboHelp Cache Project Database | CorelDRAW Graphics Suite | Corel |
| .CPH | Corel | Page Layout Files | Corel Print House File | Corel Print House | Corel |
| .CPI | Sony | Video Files | AVCHD Video Clip Information | Pinnacle Studio | Corel |
| .CPL | Microsoft Corporation | System Files | Windows Control Panel Item | CorelDRAW Graphics Suite | Corel |
| .CPO | Corel Corporation | Data Files | Corel Print House Data | Corel Print House | Corel |
| .CPS | Interscape | Game Files | The Powder Toy Save File | Corel Print House | Corel |
| .CPT | Corel | Raster Image Files | Corel Photo-Paint Image | Corel Presentations X8 | Corel |
| .CPX | Oracle Corporation | Settings Files | Oracle ADF Binding Context File | CorelDRAW Graphics Suite | Corel |
| .CRS | Open Source | Game Files | StepMania Course File | Corel WordPerfect | Corel |
| .CRW | Canon Inc. | Camera Raw Files | Canon Raw CIFF Image File | CorelDRAW Graphics Suite | Corel |
| .CSB | Corel | Developer Files | Corel PHOTO-PAINT Script | Corel Photo-Paint | Corel |
| .CSC | Corel | Developer Files | Corel Script File | Corel Photo-Paint | Corel |
| .CSH | Adobe Systems Incorporated | Uncommon Files | Photoshop Custom Shapes File | Corel WordPerfect | Corel |
| .CSI | ContentServ | Developer Files | ContentServ Include File | Corel Photo-Paint | Corel |
| .CSV | Unknown Developer | Data Files | Comma Separated Values File | Corel Quattro Pro | Corel |
| .CSW | Corel | Settings Files | Corel WordPerfect Setup Information Data | Corel WordPerfect | Corel |
| .CT | Unknown Developer | Game Files | Cheat Engine Cheat Table | Corel Painter | Corel |
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