Extension Description Opens with
323 H.323 Internet Telephony "rundll32.exe" msconf.dll
386 Virtual Device Drivers
ACC ACC file imgcomp.exe
ACR ACR-NEMA medical image file
ADB Media Manager Annotation Database
AIF Sound Clip (AIFF) rundll32.exe amovie.ocx,RunDll
AIFC Sound Clip (AIFF) rundll32.exe amovie.ocx,RunDll
AIFF Sound Clip (AIFF) rundll32.exe amovie.ocx,RunDll
ALX HTML layout msdev.exe
AMS Media Manager Folder explorer.exe
ANI Animated Cursor
ARC DOS compression file
ART First Publisher Art image iexplore.exe
ASC Image viewer
ASP Front Page Active Server Pages fpeditor.exe
AU Sound Clip (Basic) rundll32.exe amovie.ocx,RunDll
AVI Video Clip rundll32.exe amovie.ocx,RunDll

AWX Custom AppWizard
AVR Sound Files
BAS Visual Basic Module vb5.exe
BAT MS-DOS Batch File NOTEPAD.EXE
BFC Briefcase File explorer.exe
BMP Bitmap graphic file, Microsoft picture format MSPAINT.EXE
BSC Browser Information

CDA CD Audio Track cdplayer.exe -play
CGM Computer Graphics Metafile
CLP Clipboard clip clipbrd.exe
CLS Visual Basic Class Module vb5.exe
CMD Windows NT Command Script [executable]
CMM Corel MULTIMEDIA MANAGER Album MEDIAMGR.EXE
CNF SpeedDial rundll32.exe msconf.dll,OpenConfLink
CNT Help Contents File HCW.EXE
COM MS-DOS Application [executables]
CPL Control Panel rundll32.exe shell32.dll
CPT Corel PhotoPaint photopnt.exe
CRT Internet Security Certificate (x-x509-ca-cert) rundll32.exe
CSB Corel Script Binary SCEDIT.EXE
CSC Corel Script SCEDIT.EXE
CSI Corel Script Include SCEDIT.EXE
CSV Excel Comma Seperated Values File excel.exe
CTL Visual Basic User Control vb5.exe
CTX Visual Basic User Control Binary File
CUR Cursor

DAT Word Perfect Merge Data
DCX DCX image document WangImg.Exe
DER Internet Security Certificate (x-x509-ca-cert) rundll32.exe
DIC Text Document NOTEPAD.EXE
DIB DIB image imgcomp.exe
DIF Excel Data Interchange Format excel.exe
DIZ Created by programs from disks
DOB Visual Basic User Document vb5.exe
DOX Visual Basic User Document Binary File
DRV Device Driver
DSM Developer Studio Macro msdev.exe
DSN MS OLE DB Provider for ODBC Drivers
DSP Project File msdev.exe
DSR Visual Basic Designer Module vb5.exe
DSW Project Workspace msdev.exe
DSX Visual Basic Designer Binary File
DTQ Query.files msdev.exe

ENC MPEG Movie Clip rundll32.exe amovie.ocx,RunDll
EVY Envoy Document ENVOY7.EXE
EXC Text Document NOTEPAD.EXE
EXE Executable files

FAV Outlook Bar Shortcuts outlook.exe
FND Saved Search Explorer.exe
FON Font File fontview.exe
FRM Visual Basic Form files vb5.exe
FRM Word Perfect Form Merge file
FTS Created by doing a search in a help file

GAL Corel MULTIMEDIA MANAGER 6 Album CMMCONV.EXE
GED Micrografx Simply 3D project S3D2.exe
GID Created by opening a help file
GRA Microsoft Graph 97 Chart GRAPH5.EXE
GRP Microsoft Program Group (used by windows 3.1) grpconv.exe

HLP Help File winhlp32.exe
HPJ Help Project File HCW.EXE
HT Hyper Terminal File HYPERTRM.EXE
HTM Hypertext document Netscape.exe / iexplore.exe
HTML Hypertext document Netscape.exe / iexplore.exe
HTX IDC results file fpeditor.exe

ICO Icon
IDB MS Dev File msdev.exe
IDC Internet Database Connector fpidcwiz.exe
III Intel Iphone Compatible "rundll32.exe" msconf.dll
ILK MS Dev File msdev.exe
INF Setup Information NOTEPAD.EXE

INI Configuration Settings NOTEPAD.EXE
IQY Microsoft Excel Web Query File notepad.exe
IVT InfoViewer Title

JAVA Java Source file msdev.exe, ...
JPE JPEG image
JPEG JPEG image
JFIF JPEG image
JOB Scheduler Job Object
JPG JPEG Picture format
JS JavaScript Source File

LAM Netscape LiveAudio Metafile mplay32.exe
LDB Microsoft Access Record Locking
LLC Laplink Saved Connection File LapLink.exe
LLX Laplink Xchange Agent LapLink.exe
LOG Text Document NOTEPAD.EXE

M1V MPEG Movie Clip rundll32.exe amovie.ocx,RunDll
MAD Microsoft Access Module Shortcut MSACCESS.EXE
MAF Microsoft Access Form Shortcut MSACCESS.EXE
MAK Visual Basic File
MAM Microsoft Access Macro Shortcut MSACCESS.EXE
MAQ Microsoft Access Query Shortcut MSACCESS.EXE
MAR Microsoft Access Report shortcut MSACCESS.EXE
MAT Microsoft Access Table Shortcut MSACCESS.EXE
MDA Microsoft Access Add-in MSACCESS.EXE
MDB Microsoft Access Database MSACCESS.EXE
MDE Microsoft Access MDE Database MSACCESS.EXE
MDN Microsoft Access Blank Database MSACCESS.EXE
MDP Project Workspace msdev.exe
MDT Microsoft Access Add-in Data MSACCESS.EXE
MDZ Microsoft Access Wizard MSACCESS.EXE
MDW Microsoft Access Workgroup Information MSACCESS.EXE
MFQ Media Manager Query cmsfndu.exe
MIC Image Composer Document imgcomp.exe
MID MIDI Sequence (audio/x-mid) mplay32.exe
MMM Media Clip mplay32.exe
MOV QuickTime Movie player.exe
MP2 MPEG Movie Clip rundll32.exe amovie.ocx,RunDll
MPA MPEG Movie Clip rundll32.exe amovie.ocx,RunDll
MPE MPEG Movie Clip rundll32.exe amovie.ocx,RunDll
MSG Outlook Item outlook.exe
MVB MVIEWER2.EXE

NSC Netscape Conference Call File NSConf32.ex
NFO Folio Views, Microsoft Info Document

OBD Microsoft Office Binder binder.exe
OBJ Object File, Compilers
OBT MS Office Binder Template binder.exe
OBZ MS Office Binder Wizard binder.exe
ODL Object Definition Language File msdev.exe
OFN Other Office Documents... OSA.EXE
OFT Outlook Item Template outlook.exe
OPW MS Organization Chart 1.0 ORGCHART.EXE
OPX MS Organization Chart 2.0 ORGCHART.EXE
OSS Office Search finder.exe

PAG Visual Basic Property Page vb5.exe
PBK Dial-up phonebook rasphone.exe
PCH MS Dev File msdev.exe
PCX Picture format
PDB MS Dev File msdev.exe
PDL Hijaak Draw hjdraw.exe
PDW Hijaak Draw hjdraw.exe
PFM Type 1 Font file fontview.exe
PGX Visual Basic Property Page Binary File
PIC JPEG image
PKG Microsoft Developer Extension
PMA Performance Monitor File (application/x-perfmon) perfmon.exe
PMC see PMA
PML see PMA
PMR see PMA
PMW see PMA
PNG many graphics programs
POT MS PowerPoint Template (vnd.ms-powerpoint) powerpnt.exe
PPA MS PowerPoint Addin (vnd.ms-powerpoint) powerpnt.exe
PPS MS PowerPoint SlideShow (vnd.ms-powerpoint) powerpnt.exe
PPT MS PowerPoint Presentation (x-mspowerpoint) PowerPnt.exe
PT Kodak Precision Transform
PWZ MS PowerPoint Wizard (vnd.ms-powerpoint) powerpnt.exe

QRY QRY File msquery.exe
QUE Scheduler Queue Object

RA RealMedia File realplay.exe
RAM RealMedia File realplay.exe
RC Resource Template msdev.exe
RCT Resource Template msdev.exe
REG Registration Entries regedit.exe
RES MS Dev File msdev.exe
RM RealMedia File realplay.exe
RMI Media Clip mplay32.exe
RNK Dial-up Shortcut rasphone.exe
RPT Crystal Reports CRW32.EXE
RTF Rich Text Format Winword.exe
RTS RTSL Documents realplay.exe

S3D Micrografx Simply 3D project S3D2.exe
SCP Text Document NOTEPAD.EXE
SCR Screen Saver rundll32.exe
SHB Shortcut into a document shscrap.dll,OpenScrap_RunDLL
SHS Scrap object shscrap.dll,OpenScrap_RunDLL
SIT Aladdin Systems Stuffit
SLK Microsoft Excel SLK Data Import Format excel.exe
SMD SMP DaemonDocument VOD.EXE (oracle)
SND Sound Clip (Basic) rundll32.exe amovie.ocx,RunDll
SPL ShockwaveFlash Object
SWF ShockwaveFlash Object
SYS System File

TEX Corel Texture document TEXTURE.EXE
TGA TGA Image PhotoEd.exe
TIF TIF Image Document (image/tiff)
TLB Type Library
TTF TrueType Font file fontview.exe
TXT Text File

UIN ICQ user ICQ.exe
ULS Internet Location Service "rundll32.exe" msconf.dll,NewMediaPhone
URL Internet Shortcut rundll32.exe url.dll,OpenURL
UUE Uuencoded file encoded ascii
VBG Visual Basic Group Project vb5.exe
VBL Visual Basic Control License File
VBP Visual Basic Project vb5.exe
VBZ Visual Basic Wizard vb5.exe
VML Oracle Lock Manager Document VML.EXE
VMS Oracle TopSessions Document VMS.EXE
VOC Oracle Enterprise Manager Document VOC.EXE
VSD VISIO 4 Drawing Visio32.EXE
VSS VISIO 4 Drawing Visio32.EXE
VST VISIO 4 Drawing Visio32.EXE
VSW VISIO 4 Drawing Visio32.EXE

WAB outlook express address book
WAV Wave Sound (audio/x-wav) sndrec32.exe, mplay32.exe
WCM Word Perfect Macro
WD2 Info Select File Is.exe
WHT MS NetMeeting Whiteboard Document WB32.EXE
WKS Lotus Worksheet File also WK1 through WK9
WMF Windows Meta File
WPD Word Perfect Document
QPG Wordperfect Graphic File
WPT Word Perfect Template
WQ1 Quattro Pro Spreadsheet File
WRI Windows Write Document WORDPAD.EXE
WRL VRML 3D Geometry Netscape.exe, iexplore.exe
WRZ VRML 3D Geometry Netscape.exe, iexplore.exe
WT Text Document NOTEPAD.EXE

XAB Microsoft Mail address book
XBM Netscape Hypertext Document netscape.exe
XIF XIF Image Document [Image Viewers]
XLA MS Excel Add-in excel.exe
XLB Microsoft Excel Worksheet Backup excel.exe
XLC MS Excel Chart excel.exe
XLD MS Excel Dialog Sheet
XLK MS Excel Backup File excel.exe
XLL Microsoft Excel XLL Add-In excel.exe
XLM Microsoft Excel excel.exe
XLS Microsoft Excel Worksheet excel.exe
XLT Microsoft Excel Template excel.exe
XLV Microsoft Excel VBA Module
XLW Microsoft Excel Workspace excel.exe
XNK Exchange shortcut outlook.exe
XXE Xxencoded file (encoded ascii)
ZIP Pkzip Compressed File