X - XC0
-
- X - AVS image (SDSC Image Tool)
- X - Source code file (Lex)
- X-PNG - Portable ( Public ) Network Graphic bitmap file
- X01 - Secondary index file (Paradox)
- X02 - Secondary index file (Paradox)
- X03 - Secondary index file (Paradox)
- X04 - Secondary index file (Paradox)
- X05 - Secondary index file (Paradox)
- X06 - Secondary index file (Paradox)
- X07 - Secondary index file (Paradox)
- X08 - Secondary index file (Paradox)
- X09 - Secondary index file (Paradox)
- X1 - X1 Desktop Search Saved Search File (X1 Technologies Inc.)
- X10 - Bitmap image (X Window dump )
- X10 - X Window Dump Bitmap
- X11 - X Windows System Window Dump Bitmap
- X11 - Bitmap image (X Windows system window dump )
- X16 - Macromedia Extra (program extension), 16 bit
- X20 - XTree ( Gold ) DOS Help File
- X32 - Macromedia Extra (program extension), 32 bit
- X3D - x3d and xdart Formats
- X3D - Xara 3D project file
- X3D - X3D file Header
- X3D - X3D File
- X3DB - X3D Binary Format File ( Web3D Consortium )
- X3DBZ - X3D GZipped Binary Format File ( Web3D Consortium )
- X3DV - X3D Classic VRML File ( Web3D Consortium )
- X3DVZ - X3D GZipped Classic VRML File ( Web3D Consortium )
- X3F - Foveon X3F RAW format image.
- X3F - Sigma Camera RAW Picture File ( Sigma )
- X40 - Xtree ( gold ) Dos help file
- X5 - Rockwell Software Logix 5 File
- X50 - Xtree ( gold ) Dos help file
- X60 - Xtree ( gold ) Dos help file
- X64 - X64 and VICE emulators disk image Header
- X64 - Commodore 64 Disk Image
- X64 - C64 Emulator Disk Image
- X70 - XTree ( Gold ) - DOS Help File
- X80 - Xtree ( gold ) Dos help file
- X83 - GAEB DA2000 XML and XML File
- X86 - Unknown file extension
- X90 - XTree ( Gold ) (DOS) Help File
- X_B - Parasolid Model Part File
- X_B - Parasolid CAD File
- X_T - Parasolid CAD File (UGS Corp.)
- X_T - Parasolid Model Part File
- XA - Maxis XA Audio ( sound / speech ) Header
- XA - The Sims Extensive Audio ( Electronic Arts ( Maxis ))
- XA - Sony PlayStation audio / video file
- XA - Gear CD Suite File
- XA - Playstation Video ( Sony Corporation of America )
- XA - Extended Architecture File
- XA - GEAR Image file
- XA - XA audio file
- XA0 - Xtree ( gold ) Dos help file
- XA2 - Exam Editor Question Groups ( Nice Productions )
- XAA - Unknown or unassigned file extension
- XAB - Microsoft Mail address book
- XAB - Xenis Mail address book
- XAB - Mail Address Book ( Microsoft Corporation )
- XAC - GNUCash GNUCash Backup File (The GNUCash Project )
- XAD - eXotic AdLib Format
- XADML - XML- based Application Description Information
- XAF - Active VRML
- XAF - Microsoft Active VRML file
- XAML - Microsoft Extensible Application Markup Language Header
- XAML - XAML File
- XAML - Extensible Application Markup Language
- XAN - XANIA Browser
- XANN - XANN Packer format ( music / sound )( Asle / ReDoX )
- XAP - Xbox Dashboard Script ( Microsoft Corporation )
- XAP - Compressed Silverlight Application
- XAP - Silveright application package
- XAP - XACT Project
- XAP - Silverlight Application Package ( Microsoft Corporation )
- XAR - Corel Xara drawing
- XAR - Microsoft Excel auto-save files
- XARC - ISS Audio Header
- XAS - PTC Pro/ Engineer assembly file
- XAS - Playstation Video ( Sony Corporation of America )
- XB0 - XTree ( Gold ) DOS ( Help File )
- XBA - Timespace X200 / K200 Digital Video Recorder Video File
- XBD - Fuji Xerox Docuworks file
- XBEL - XML Bookmark Exchange Language
- XBF - Emperor Battle for Dune
- XBF - Database file
- XBF - Data base file
- XBIN - RegSupreme License File ( Macecraft Software )
- XBK - SMART Board Slide Collection ( SMART Technologies Inc.)
- XBK - SMART Notebook File
- XBL - Extensible Binding Language
- XBL - XBLite source code file
- XBM - A MIME 'X11" bitmap image
- XBN - Cygnus ld- scripts file
- XBSAV - Mass Effect 2 Xbox Saved Game
- XBW - Crossword
- XBX - CD Image File
- XC - X Server Constant Screen Image Bitmap
- XC - Bitmap image (X server screen )
- XC0 - Xtree ( gold ) Dos help file
