X
AVS image (SDSC Image Tool)
X
Source code file (Lex)
XAR
Corel Xara drawing
XBM
A MIME 'X11" bitmap image
XDL
XML Schema file
XFN
Printer font file (Xerox)
XFN
Printer font file (Ventura Publisher)
XFT
Printer font file (24 Pin) (ChiWriter)
XFX
Fax Document (Various)
XHTML
eXtensible hypertext markup language
XI
Instrument sample file (ScreamTracker)
XI
Instrument file (FastTracker II)
XIF
Wang imaging file (Included with Windows 95)
XIF
Image file (Xerox) (same as TIF)
XLA
Add-in file (Microsoft Excel)
XLA
Archive (Xlib)
XLB
Toolbar file (Microsoft Excel)
XLB
Datafile (Microsoft Excel)
XLC
Chart file (Microsoft Excel)
XLD
Dialogue file (Microsoft Excel)
XLK
Backup file (Microsoft Excel)
XLL
Add-in file (Microsoft Excel)
XLL
Dynamic link library (Microsoft Excel)
XLM
Macro file (Microsoft Excel)
XLS
Worksheet file (Microsoft Excel)
XLT
Template file (Microsoft Excel)
XLT
Translation table (Lotus 1-2-3)
XLT
Translation table (Symphony)
XLT
Translation table (Procomm Plus)
XLV
VBA module (Microsoft Excel)
XLW
Workbook (Microsoft Excel)
XM
Music module (MOD) (Fast Tracker 2)
XMI
Compressed midi music (eXtended)
XML
eXtensible markup language
XNF
Network file (Standard)
XNK
Shortcut file (Microsoft Exchange)
XPM
X BitMap format
XQT
Executable file (Waffle)
XQT
Macro file (SuperCalc)
XXX
XXXX
XR1
Data file (Epic Megagames Xargon)
XRF
Cross-reference file (Generic)
XTB
External translation table (LocoScript)
XTP
Data file (Xtree)
XWD
X Window Dump format (SDSC Image Tool)
XWF
Works file (Yamaha XG) (MIDI sequencing)
XWK
Keyboard mapping file (Crosstalk)
XWP
Session file (Crosstalk)
XWP
Text file (Xerox Writer)
XX
Compressed ASCII archive (XXENCODE)
XXE
Compressed ASCII archive (XXENCODE)
XY
Text file (XYWrite)
XY3
Document file (XYWrite III)
XY4
Document file (XYWrite IV)
XYP
Document file (XYWrite III Plus)
XYW
Document file (XYWrite for Windows 4.x)
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)
X16
Macromedia Extra (program extension), 16 bit
X32
Macromedia Extra (program extension), 32 bit