.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.X LEX Program File
Amapi 3D Modeling (prior to version 4)
Stardent AVS X Image [XnView]
Xview Object (create DirectX 3D scenes)
.X01 Paradox Secondary Index (can be 01 to 09)
.X16 Macromedia Program Extension (16-bit)
.X32 Macromedia Program Extension (32-bit)
.X3D Xara 3D Project File
.X4M TeamLinks Mail File Data
.X5 Rockwell Software Logix 5 File
.X_T Parasolid CAD File
.XA Extended Architecture File
The Sims (Maxis) Extensive Audio
File on PSX Disc
Gear CD Suite File
.XAB Xenis Mail Address Book
.XAN XANIA® Browser
xyALGEBRA File
.XAR Xara X Vector Drawing
Corel Xara Drawing (old)
.XBF Emperor Battle for Dune [Format]
.XBM X Bitmap Graphic [IrfanView]
.XBS ETAK MapBase
.XCF GIMP Image File [GIMP] [XnView]
.XDF Workshare Synergy File
Milnta APL Transfer Function (Dyalog APL File)
.XDP UNIX File (unverified)
.XDS OpenGL Performer Script
.XDW Fujixerox DocuWorks File [Viewer (in Japanese)] [Viewer (in English)]
Milnta APL Transfer Function (Dyalog APL Workspace)
.XFD XML Form in XFDL Format [Viewer]
.XFDF Acrobat Forms Document
.XFM OmniForm XML Format
.XFN Ventura Printer Font
.XFR Symantec Norton Anti-Virus Corporate Version Failed Update
.XFT Chiwriter 24 Pin Printer Font
.XFX Fax File (various)
.XG1 Techno Toys XG-909 MIDI Drum Machine File
.XG9 Techno Toys XG-909 MIDI Drum Machine File
.XGM Techno Toys XG-909 MIDI Drum Machine File
.XGO LogMate for Windows File
GeoConcept File
.XGR MS Graph Edit XML Graph
.XI Fast Tracker 2 Instrument
ScreamTracker Instrument File
.XIF Wang Image File
Often a Fax Image (TIFF) File [IrfanView]
ScanSoft Pagis XIF Extended Image Format (FAX)
Xerox Image File
.XIP Hotbar Image Compression Format
.XJS WinExplorer Java Script
.XJT Compressed GIMP Image with Properties of GIMP (.XJT is plain tar file)
.XJTGZ Compressed GIMP Image with Properties of GIMP (gzip compressed tar file)
.XJTZ2 Compressed GIMP Image with Properties of GIMP (bzip2 compressed tar file)
.XL Old Amiga Movie Format
.XLA Excel Add-in [Buy Office XP at Shop.Microsoft]
Xlib Archive
.XLB Excel File [Buy Office XP at Shop.Microsoft]
.XLC Excel Chart [Buy Office XP at Shop.Microsoft]
.XLD Excel Dialog [Buy Office XP at Shop.Microsoft]
.XLG Xnetech Engraving Logo File
.XLK Excel Backup [Buy Office XP at Shop.Microsoft]
.XLL Excel Add-in (Dynamic Link Library) [Buy Office XP at Shop.Microsoft]
.XLM Excel Macro [Buy Office XP at Shop.Microsoft]
.XLR MS Works File
.XLS Excel Worksheet [Buy Office XP at Shop.Microsoft]
(also MS Works spreadsheet)
DATAIR Data Import Specification Translation File
.XLSHTML Excel HTML Document [Buy Office XP at Shop.Microsoft]
.XLSMHTML Excel Archived HTML Document [Buy Office XP at Shop.Microsoft]
.XLT Excel Template [Buy Office XP at Shop.Microsoft]
Procomm Plus Translation Table
Lotus Translation Table
.XLTHTML Excel HTML Template [Buy Office XP at Shop.Microsoft]
.XLV Excel VBA [Buy Office XP at Shop.Microsoft]
.XLW Excel Workspace [Buy Office XP at Shop.Microsoft]
.XM Sound File
Fast Tracker 2 Extended Module
.XMAP File That Controls How XML/XSL Gets Served (SITEMAP.XMAP Info) [ASCII Text File]
.XMB X-Wing Mission Briefing File
.XMF Milnta APL Transfer Function (Mainframe (SAM) File)
.XMFG MediaForge Runtime Player
.XMI Winamp Extended Midi File
EverQuest File
.XML Extensible Markup Language File [XML]
.XMP Graphic File
.XMS ViewCafé XML Markup Session
.XMT_TXT Parasolid CAD File
.XMV Milnta APL Transfer Function (Mainframe (SAM) Workspace)
.XMX Character Set File
AutoCAD External Message Compiled File
.XNF Standard Network File Form
.XNG OM2 911 Xchange Version 6 Document
.XNK Exchange Shortcut
.XOT Xnetech Job Output File
.XP WinXP Theme (unverified)
.XPI Mozilla Browser Archive (open with any ZIP utility)
.XPL Music File
WinExplorer Simple Script
.XPM X Picsmap Graphic [IrfanView]
.XPO Omega Research ProSuite
.XPTHEME Winstyles Theme (customizes the Windows Desktop)
.XPW Screen-Fillable Surfer Version of a Form
Leading Market Technologies EXPO (professional investment charting/analysis)
.XPY MarketBrowser (investment charting/analysis)
.XQT SuperCalc Macro Sheet
Waffle Executable File
.XRF Cross Reference
.XR1 Epic MegaGames Xargon File
.XRF Crossreference File
.XS Hummingbird Exceed File
.XSD XML Schema File [XML] (read in text editor)
.XSF Milnta APL Transfer Function (APL+Win File (former STSC))
.XSI Softimage XSI
.XSL XML Stylesheet (eXtensible Style sheet Language for Transformations (XSLT)) [XML] (read in text editor)
FileMaker Database Design Report Template
.XSM LEXIS-NEXIS Tracker
.XSN xyALGEBRA File
.XSW Milnta APL Transfer Function (APL+Win Workspace (former STSC))
.XT* Crosstalk Related File
.XTB LocoScript External Translation Table
.XTG Quark Xpress Tags File
.XTR RealArcade Compressed Data File
.XTS CSPro File (combined IMPS and ISSA Census Processing System)
Babya Desktop Shell System Software Extension
.XUF Milnta APL Transfer Function (Unix (SAX) File)
.XUL XML User Interface Language
.XUW Milnta APL Transfer Function (Unix (SAX) Workspace)
.XV Khoros Visualization Image File [XnView]
.XVB WinExplorer VB Script
.XVP Xview Package File (create DirectX 3D scenes)
.XVS Xview Scene Package File (create DirectX 3D scenes)
.XVU BOClean Database File
.XWD X Windows Dump
Crossdown Puzzle File
.XWF Yamaha XG Works File
.XWI X-Wing Mission File
.XWK Crosstalk Keyboard Mapping
.XWP Crosstalk Session
XMLwriter XML Editor File
Xerox Writer Text File
.XX Xxencoded File
Arcedit Temporary File
.XXE Xxencoded File
.XXX Singer Sewing Machine Professional SewWare File
Embroidery Design File [possibly read with Melco Sizer Software]
.XXY SPARC Executable Script File (e.g., /etc/hostname.xxy identifies network interface on local host)
.XY XYWrite Text File
.XY3 XYWrite Text File
.XY4 XYWrite IV Document
.XYP XYWrite III Plus Document
.XYW XYWrite Windows 4.0 Document
.XYZ XMol XYZ (MIME type chemical/x-xyz)
