AAM Authorware shockedļ
AAS Authorware shocked
ABF AdobeĻ
ABK CorelDRAWԶļ
ABS ļʱָʾһժҪһƪйؿѧµһժҪҪȡabstract 
ACE Aceѹʽ 
ACL CorelDRAW 6̿ݼļ 
ACM WindowsϵͳĿ¼ļ 
ACP Microsoft officeԤļ 
CR ҽѧѧļʽ 
CT Microsoft officeļ 
ACV OS/2ѹѹƵ 
AD After DarkĻ 
ADA AdaԴļ-GNAT 
ADB AdaԴļ壨GNATHP100LX֯ߵԼݿ 
ADD OS/2̵ 
ADF Amigaļ 
ADI AutoCAD豸޹ضƻͼǸʽ 
ADM After DarkģĻWindows NTģ 
ADP FaxWorkڴƽĽװļAstound Dynamiteļ 
ADR After DarkĻSmart Addressĵַ 
ADS AdaԴļ˵飨GNAT 
AFM Adobe߶ 
AF2AF3 ABCFlowChatļ 
AI Adobe Illustratorʽͼ 
AIFAIFF ƵļSilicon Graphic and MacintoshӦóʽ 
AIFC ѹAIF 
AIM AOLʱϢ 
AIS ACDSeeͼļVelvet Studio豸ļ 
AKW RoboHELPİA-ؼ 
ALAW ŷ޵绰Ƶʽ 
ALB JASC Image Commander 
ALL ſ 
AMS Velvet Studioģ飨MODļExtremeTrackerģļ 
ANC Canon Computerĵɫļһϵпѡɫ 
ANI WindowsϵͳеĶ 
ANS ANSIıļ 
ANT SimAnt For WindowsбϷļ 
API Adobe AcrobatʹõӦóƽӿļ 
APR Lotus Approach 97ļ 
APS Microsoft Visual C++ļ 
ARC LH ARCѹļ 
ARI Aristotleļ 
ARJ Robert Jung ARJѹļ 
ART Xara Studio滭ļCanon CrayolaļClip Artļʽһֹ߸ٸʽAOLʹõJohnsonGraceѹ㷨ѹıļ 
ASA Microsoft Visual InterDevļ 
ASC ASCıļPGP㷨ļ 
ASD Microsoft WordԶļMicrosoft߼ýʽmicrosoft advanced streaming FORMatASFļNSREX Velvet Studioļ 
ASE Velvet Studioļ 
ASF Microsoft߼ýʽļ 
ASM ԴļPro/Eװļ 
ASO Astound Dynamiteļ 
ASP ̬ҳļProComm PlusװӽűļAstoundļ 
AST AstoundýļClarisWorks֡ļ 
ASV DataCADԶļ 
ASX CheyenneݽűļMicrosoft߼ýضļƵļ 
ATT AT< Group 4λͼļ 
ATW ԸAny Time Deluxe For WindowsϢԱļ 
AU Sun/NeXT/DEC/UNIXļƵU-Lawmu-lawļʽ 
AVB Computer Associates InoculanĲȾļ 
AVI Microsoft Audio Video InterleaveӰʽ 
AVR Audio Visual Researchļʽ 
AVS Ӧóӻʽ 
AWD FaxVienĵ 
AWR TelsisִƵļչʽ 
Axx ARJѹļķְļڽһļѹСѹУxxȡ01-99֣ 
A3L Authorware 3.xļ 
A4L Authorware 4.xļ 
A5L Authorware 5.xļ 
A3MA4M Authorware Macintoshδļ 
A4P AuthorwareʱĴļ
A3WA4WA5W δAuthorware Windowsļ
[༭]B ļ
BAK ļ 
BAS BASICģļ 
BAT ļ 
BDF West Point Bridger Designerļ 
BFC Windows 95 Briefcaseĵ 
BG Backgammon For WindowsµϷļ 
BGL Microsoft Flight Simulator΢ģӾļ 
BI ļ 
BIF Group Wiseĳʼļ 
BIFF XLIFE 3Dʽļ 
BIN ļ 
BK ʱڴݰ汾 
BKS IBM BookManager Readļ 
BMK ǩļ 
BMP WindowsOS/2λͼļ 
BMI Apogee BioMenaceļ 
BOOK Adobe FrameMaker Bookļ 
BOX Lotus Notesļ 
BPL Borlard Delph 4 
BQY BrioQueryļ 
BRX ڲ鿴ýĿ¼ļ 
BSC MS Developer StudioϢļ 
BSP Quakeͼļ 
BS1 Apogee Blake Stoneļ 
BS_ Microsoft Bookshelf Find˵չ 
BTM Norton Ӧóʹõļ 
BUD Quickenıݴ 
BUN CakeWalk ļ(һMIDI) 
BW SGIڰͼļ 
BWV ҵļ 
BYU BYUĵӰļʽ 
B4 Helix Nuts and Boltsļ
[༭]C ļ
C Cļ 
C0l ̨粨ļ 
CAB Microsoftѹļ 
CAD SoftdekDrafix CADļ 
CAL CALSѹλͼƻ 
CAM Casioʽ 
CAP ѹļʽ 
CAS ŷֿASCļ 
CAT Quickenʹ IntellChargeļ 
CB Microsoftɾļ 
CBI ƾʽļ(IBMͻϵͳ) 
CC Visual dBASEûԶļ 
CCA ccʼļ 
CCB Visual Basic̬ťļ 
CCF ý鿴ļOS/2 
CCH Corelͼļ 
CCM Lotus cc䣨硰INBOX.CCM 
CCO CyberChatļ 
CCT Macromedia Director ShockwaveͶӰ 
CDA CDƵ 
CDF MicrosoftƵʽļ 
CDI Philipĸ̽ʽ 
CDM Visual dBASEԶģļ 
CDR CorelDRAWͼļԭʼƵCDļ 
CDT CorelDRAWģ 
CDX CorelDRAWѹͼļMicrosoft Visual FoxProļ 
CEL CIMFast¼ļ 
CER ֤ļMIME x-x509-ca-cert 
CFB ComptonĶýļ 
CFG ļ 
CFM CotdFusionģļVisual dBASE WindowsûƱ 
CGI ؽӿڽűļ 
CGM ͼԪļ 
CH OS/2ļ 
CHK WindowsƬɨ豣ļƬ 
CHM HTMLļ 
CHR ַļ 
CHP Ventura Publisher½ļ 
CHT ChartViemļHarvard Graphicsʸļ 
CIF Adaptec CD  CDӳļ 
CIL Clip Galleryذ 
CIM SimCity 2000ļ 
CIN OS/2ıļڸINIļеı仯 
CK1 iD/Apogee Commander Keen 1ļ 
CK2 iD/Apogee Commander Keen 2ļ 
CK3 iD/Apogee Commander Keen 3ļ 
CK4 iD /Apogee Commander Keen 4ļ 
CK5 iD /Apogee Commander Keen 5ļ 
CK6 iD /Apogee Commander Keen 6ļ 
CLASS Javaļ 
CLL Crick Software Clickerļ 
CLP Windows ļ 
CLS Visual Basicļ 
CMD Windows NTOS/2ļDOS CD/MļdBASEļ 
CMF CorelԪļ 
CMG ChessmasterϷļ 
CMP JPEGλͼļַĵ 
CMV Corel Moveļ 
CMX Corel Presentation Exchangeͼ 
CNF TelnetWindowsڸʽᷢıӦóʹõļ 
CNM WindowsӦó˵ѡͰװļ 
CNQ Compuworks Design Shopļ 
CNT WindowsϵͳڰĿļ 
COB TrueSpace 2ļ 
COD Microsoft CĿʾ/ļиԴCΪע 
COM ļ 
CPD Corel Print OfficeļͼΣ 
CPDCPE 渲ĵ 
CPI Microsoft MS-DOSҳϢļ 
CPL չCorelɫ 
CPO Corelӡ洢ļ 
CPP C++ļ 
CPR Corelṩ˵ļ 
CPT Corel Ƭ-滭ͼ 
CPX Corel Presentation Exchangeѹͼļ 
CRD Windows Cardfileļ 
CRP Corel ṩʱļVisual dBASEԶ屨ļ 
CRT ֤ļ 
CSC Corelűļ 
CSP PC Emcee On_Screenͼ 
CSS ٲʽļ 
CST Macromedia Director Castļ 
CSV ŷֵָļ 
CT Scitex CTλͼļPaint Shop Pro Grapic༭ļ 
CTL ͨڱʾһؼϢļFaxWorkйÿյ򷢳Ϣ 
CUE Microsoftʾļ 
CUR Windowsļ 
CUT Dr Haloλͼļ 
CV Corel汾ĵļMicrosoft CodeViewϢĻļ 
CWK ClarisWorksļ. 
CWS ClarisWorksģ 
CXT Macromedia Directorܱģɱ༭ģͶӰļ 
CXX C++Դļ
[༭]D ļ
DAT ļWrodPerfectϲļһЩMPEGʽļ 
DB BorlandParadox 7 
DBC Microsoft Visual FoxProݿļ 
DBF dBASEļһAshton-TateĸʽԱACTLipperFoxProAragoWordtechXbaseݿݿйزƷʶ𣻿ļܱExcel 97򿪣Oracle 8.1.xռļ 
DBX DataBearnͼMicrosoft Visual FoxProļ 
DCM DCMģʽļ 
DCR ļ 
DCS ɫָļ 
DCT Microsoft Visual FoxProݿ 
DCU Delphi뵥Ԫļ 
DCX Microsoft Visual FoxProݿPCXĴͼ񣻺 
DC5 DataCADͼļ 
DDF BtrieveXtrieveݶļBtrieveXtrieveļԪ 
DDIF Digital Equipment Compaqʽڱͼִĵ 
DEF SmartWareļC++ģ鶨ļ 
DEFI Oracle 7 жؽűļ 
DEM ڱʾָ߶ģ͵USGS׼ļ 
DER ֤ļ 
DEWF Macintosh Sound Cap/Sound Edit¼豸ʽ 
DGN Macintosh 95 CADͼļ 
DIB 豸޹λͼ 
DIC Ŀ¼ 
DIF ɽݻĵӱ 
DIG DigiLinkʽSound DesignerƵļ 
DIR MacromediaDirectorļ 
DIZ ļ 
DLG C++Իűļ 
DLL ̬ӿ 
DLS ļ 
DMD Visual dBASEģļ 
DMF X-Trakkerģ飨MODļ 
DOC FrameMakerFrameBuilderĵWord StarĵWord PerfectĵMicrosoft WordĵDisplayWriteĵ 
DOCX office 2007ĵ
DOT Microsoft Wordĵģ 
DPL Borland Delph3ѹ 
DPR Borland Delphiͷļ 
DRAW AcornĻڶʸͼļ 
DRV  
DRW Micrografx Designer/DrawPro/E滭ļ 
DSF Micrografx Designer VFXļ 
DSG DOOMļ 
DSM Dynamic Studioģ飨MODļ 
DSP Microsoft Developer Studioļ 
DSQ Corel QUERYѯļ 
DST ͼļ 
DSW Microsoft Developer Studioļ 
DTA Word BankУSTARSļ 
DTD SGMLĵͶ壨DTDļ 
DTED ߶ݣͼεݸʽļ 
DTF Symantec Q&Aصݿļ 
DTM DigiTrakkerģļ 
DUN Microsoftκ絼ļ 
DV ƵļMIME 
DWD DiamondWareֻļ 
DWG AutoCADͼļAutoCADGeneric CADDϰ汾Ļͼʽ 
DXF ɽлĻͼļʽƵDWGʽıʾݽļ 
DXR Macromedia Directorܱɱ༭Ӱļ 
D64 Commodore64λģͼļ
[༭]Eļ
EDA Ensoniq ASRӳ 
EDD ԪضĵFrameMaker+SGMLĵ 
EDE Ensoniq EPSӳ 
EDK Ensoniq KTӳ 
EDQ Ensoniq SQ1/SQ2/Ks32ӳ 
EDS Ensoniq SQ80ӳ 
EDV Ensoniq VFX-SDӳ 
EFA Ensoniq ASRļ 
EFE Ensoniq EPSļ 
EFK Ensoniq KTļ 
EFQ Ensoniq SQ1/SQ2/Ks32ļ 
EFS Ensoniq SQ80ļ 
EFV Ensoniq VFX-SDļ 
EMD ABTչģ 
EMF WindowsǿԪļ 
EML Microsoft Outlook ExpressʼϢMIME RTC822ļ 
ENC ļ 
ENFF ļʽչ 
EPHTML PerlǿHTMLļ 
EPS ѹPostScriptͼ 
EPSF ѹPostScriptļ 
ERI ERWinļ 
ERR RobooHELPͼһϵͳԴļʱ洢Ϣļ 
EPX ERWinļ 
ESPS ESPSƵļ 
EUI Ensoniq ESPѹӳ 
EVY ʹĵ 
EWL Microsoft Encartaĵ 
EXC Microsoft Wordֵֹ 
EXE ִļ
[༭]F ļ
F FORTRANļ 
F2R Farandoyleģʽ 
F3R Farandoyleֿģʽ 
F77 FORTRANļ 
F90 FORTRANļ 
FAR Fradole Composerģ飨MODļ 
FAV Microsoft Outlook 
FAX ͼ 
FBK Navison ڱ 
FCD CD-ROM 
FDB Navison ݿ 
FDF Adobe Acrobatĵļ 
FEM CADREԪļ 
FFAFFLFFOFFK Microsoftٲļ 
FFF GUS PnPļʽ 
FFT ոʽıIBMDCAһ֣ 
FH3 Aldus Freehand 3ͼļ 
FIF Fractalͼļ 
FIG REND386/AVRILʹõļʽ 
FITS CCDͼͼϵͳ 
FLA Macromedia FlashӰ 
FLC Autodesk FLICļ 
FLF Corel ParadoxĸʽNavison FinancialsļOS/2ļ 
PLI Autodesk FLIC 
FLT StarTrekkerģ(MOD)ļMultiGen IncOpen FlightʹõļʽCorelļ 
FM Adobe FrameMakerĵ 
FMB Oracle4.0Ժ汾ĶԴļ 
FML ļбGetRight 
FMT Oracle 4.0Ժ汾ıʽMicrosoft Schedule+ ӡļ 
FMX Oracle 4.0Ժ汾ִб 
FND Microsoft ExplorerļFind applet 
FNG ļ嵼Font Navigator 
FNK Funk Trackerģʽ 
FOG Fontographerģ 
FON ϵͳ 
FOR FORTRANļ 
FOT ļ 
FP FileMaker Proļ 
FP1 Flying Pigs for Windowsļ 
FP3 FileMaker Proļ 
FPT FileMaker ProļMicrosoft Fox Proעļ 
FPX FlashPixλͼ 
FRM Frame MakerFrame BuilderĵOracleִб(3.0ڰ汾)Visual BasicWordPerfect MergeDataCAD־ļ 
FRT Microsoft FoxProļ 
FRX Visual BasicıMicrosoft FoxProļ 
FSF fPrint Audit Toolļʽ 
FSL BorlandParadox 7Corel Paradoxı 
FSM Parandoyleʾʽ 
FT Lotus Notesȫı 
FTG ȫıļWindowsϵͳʱɾҪʱؽ 
FTS ȫıļWindowsϵͳʱ 
FW2 Framework ļ 
FW3 Framework ļ 
FW4 Framework ļ 
FXP Microsoft FoxProԴļ 
FZB Casio FZ-1ת 
FZF Casio FZ-1ȫת 
FZV Casio FZ-1ת
[༭]G ļ
G721 Raw CCITT G.721 $bit ADPCMʽ 
G723 Raw CCITT G.723 35bit ADPCMʽ 
GAL Corelý༯ 
GBA GBAļ
GB GBļ
GBC GBCļ
GCD Generic CADD滭ļ汾 
GCP Ground Control PointƵ㣩ļԶγͼ̣ͼ̡CHIPScopenhagen image processing systemʹЩļ 
GDB InterBaseݿļ 
GDM ģʽ 
GED GEDCOM ϵļڼ¼ͽϵݵиʽͼλĵ滭 
GEM GEMԪļ 
GEN Venturaıļ 
GetRight GetRightδɵļ 
GFC Patton&Patton FlowCharting 4 flowchartļ 
GFIGFX Genigraphicsͼӱʾļ 
GHO Norton ¡ӳ 
GID Windows 95ȫļ״̬ 
GIF CompuServeλͼļ 
GIMGIX Genigraphicsͼӽļ 
GKH Ensoniq EPSҴشӳļ 
GKS Gravis Grip Keyĵ 
GL ʽ 
GNA Genigraphicsͼӽļ 
GNT ɴ룬Micro FocusԸʽĿִд 
GNX Genigraphicsͼӽļ 
GRA Microsoft Graphļ 
GRD ԶӾݲͼ̵ĸʽļͨӦγɵͼ̡CHIPScopenhagen image processing systemʹЩļ 
GRF GrapherGolden Software˾ͼļ 
GRP  
GSM Raw GSM 6.10ƵRawbyte alignedضģ GSM 6.10ƵUS Roboticsƽ 
GTK Graoumftrackerϣģ飨MODļ 
GT2 Graoumftracker£ģ飨MODļ 
GWXGWZ Cenigraphisͼӽļ 
GZ UNIX gzipѹļ
[༭]H ļ
H Cͷļ 
HCM IBM HCMļ 
HCOM HCOMʽ 
HCR IBM HCD/HCMƷļ 
HDF ߼Ӧó򱾵ģNCSA geospatial Hierarchialݸʽļ 
HED HighEditĵ 
HEL Microsoft HellbenderʽϷļ 
HEX Macintosh BinHex2.0ļ 
HGL HPͼԻͼļ 
HH ӳļһЩIDڰļϵͳлӳ֡Ӧó͸ûʵİ HLP ļDate CAD Windowsļ 
HOG Lucas ArtsDark Forces WADļ 
HPJ Visual Basic 
HPP C++ͷļ 
HQX Macintosh BinHex 4.0ļ 
HST ʷļ 
HT HyperTerminalնˣ 
HTMHTML ıĵ 
HTT Microsoftıģ 
HTX չHTMLģ
HXM Descent2 HAMļչ
[༭]I ļ
ICA Citrixļ 
ICB Targaλͼļ 
ICC Kodakӡʽļ 
ICL ͼļ 
ICM ͼɫƥļ 
ICO Windowsͼ 
IDB MSDevмļ 
IDD MIDI豸 
IDF MIDI豸壨Windows 95Ҫļ 
IDQ Internetݲѯļ 
IDX Microsoft FoxProݿļSymantec Q&AݿļMicrosoft Outlook Expressļ 
IFF ʽļAmiga ILBM 
IGES ʼͼν˵ļ 
IGF ϵͳԪļ 
IIF QuickBooks for Windowsļ 
ILBM λͼͼļ 
IMA WinImageӳļ 
IMG GEMӳ 
IMZ WinImageѹӳļ 
INC Ի̬ļ 
INF Ϣļ 
INI ʼļMWave DSP Synthġnwsynth.ini GMSװCravis Ultrasound bankװ 
INP Oracle 3.0ڰ汾ıԴ 
INRS INRSԶͨƵ 
INS InstallShieldװűX-InternetǩļEnsoniq EPSִ豸Cell/MAC/PC豸 
INT м룬һԴ򾭹﷨һִд 
IOF Finditĵ 
IQY Microsoft Internetѯļ 
ISO ISD 9660йCD-ROMļϵͳ׼гCD-ROMϵļ 
ISP X-Internetǩļ 
IST ָ豸ļ 
ISU InstallShieldжװű 
IT ϵͳģ(MOD)ļ 
ITI ϵͳ豸 
ITS ϵͳInternetĵλ 
IV Open Inventorʹõļʽ 
IVD 20/20΢άȼļ 
IVP 20/20ûӼļ 
IVT 20/20򼯺ļ 
IVX 20/20΢Ŀ¼ļ 
IW IdlewildĻ
IWC Install Watchĵ
[༭]J ļ
J62 Ricohʽ
JAR Javaļһappletļѹļ 
JAVA JavaԴļ 
JBF Paint Shop Proͼļ 
JFFJFIFJIF JPEGļ 
JMP SASJMPDiscoveryͳļ 
JN1 Epic MegaGamesJill of the Jungleļ 
JPEJPEGJPG JPEGͼļ 
JS javascriptԴļ 
JSP HTMLҳажһJava servletĲο 
JTF JPEGλͼļ
[༭]K ļ
K25 Kurzweil 2500ļ 
KAR OK MIDIļı+MIDI 
KDC Kodakǿ 
KEY DataCADͼ깤ļ 
KFX KoFak Group 4ͼļ 
KIZ KodakƬļ 
KKW RoboHELP޹صKͷйؼ 
KMP Korg Trinity KeyMapļ 
KQP Konicaļ 
KR1 Kurzweil 2000ļ 
KRZ Kurzweil 2000ļ 
KSF Korg Trinityļ 
KYE KyeϷ
[༭]L ļ
LAB Visual dBASEǩļ 
LBM Deluxe Paintλͼļ 
LBTLBX Microsoft FoxProǩļ 
LDB Microsoft Accessļ 
LDF Microsoft SQL Server־ļ
LDL Corel Paradoxַ 
LEG Legacyĵ 
LES LogitechϵͳϷļRECļһ 
LFT 3D StudioDOSļ 
LGO PaintbrushMicrosoftͼӦó򣩵Ļձļ 
LHA LZHļ׺ 
LIA ֽͼļ
LIB ļ 
LIN DataCADļ 
LIS ṹѯ棨SQRļ 
LLX Laplink 
LNK Windowsݷʽļ 
LOG ־ļ 
LPD Helix NutBoltļ 
LRC Intelӵ绰ļ 
LSL Corel ParadoxĿļ 
LSP AutoLISPCommonLISPLISPļ 
LST бļ 
LU ThoughtWingⵥԪļ 
LVL Parallax Software Miner Descent/D2 Levelչ 
LWLO Lightwaveֲļ 
LWOB Lightwaveļ 
LWP Lotus WordPro 96/97ļ 
LWSC LightwaveӾļ 
LYR DataCADļ 
LZH LH ARCѹ
LZS Skyroadsļ
[༭]M ļ
M1V MPEGļ(MIMEmpeg) 
M3D Corel Motion 3Dļ 
MDF Microsoft SQL Server ݿļ
[༭]N ļ
N Nuke Randomic Life Generator 
N1 Nuke Randomic Life Generator 
N1E OM2 OMALI NENA Encrypted Document Version 1 
N2E OM2 OMALI NENA Encrypted Document Version 2 
N2P Net2Phone File 
N3 Notation 3 Document 
N3D2 The Nebula Device 2 Mesh Resource File in ASCII Format (RadonLabs GmbH) 
N3E OM2 OMALI NENA Encrypted Document Version 3 
N4E OM2 OMALI NENA Encrypted Document Version 4 
N64 MiMiX Emulator 
N64 Nintento 64 Emulation ROM Image 
NA NoAdware Data File (NoAdware.net) 
NA2 Netscape Communicator Address Book 
NAB Netscape Communicator Address Book 
NAB Novell Groupwise Address Book 
NAD Noder File 
NAF Compressed Archive 
NAI WinINSTALL File 
NAK Audio 
NAL ArrayScribe (NimbleGen Systems Inc.) 
NAM Office Name File 
NAMEONCLIPBOARD NAMEONCLIPBOARD Powertoy File 
NAN Nanoscope File 
NAP Electrical Network Analysis and Planification 
NAP EnerGraphics VideoShow File 
NAP NAP Metafile Vector Image 
NAP Napster Music Security Definition File 
NAP VideoShow/EnerGraphics NAPLPS Vector Image Metafile 
NAP ePolicy Orchestrator Network Associates Package (Policy File) (Network Associates Technology, Inc.) 
NAPLPS North American Presentation Layer Protocol Syntax = Vector image 
NAR Nikon Capture Advanced RAW File (Nikon Inc.) 
NAS NASTRAN File 
NASB TheWord & Bible Companion New American Standard Bible 
NAV Application Extension (Microsoft) 
NAV Microsoft Network Component (Microsoft) 
NAV MSN Application Extension 
NAV Counter-Strike: Source CSBot Navigation Mesh (Valve Corporation) 
NB Mathematica Notebook (Wolfram Research, Inc.) 
NB Nota Bene Document File (Nota Bene Associates, Inc.) 
NB WordPerfect Notebook (Corel Corporation) 
NB7 NovaBACKUP System Configuration File (NovaStor Corporation) 
NBA NBA Game Data 
NBA Nota Bene Configuration Information File (Nota Bene Associates, Inc.) 
NBATTRS NetBeans Project Attributes File (Collab.Net, Inc.) 
NBE Nessus File 
NBF Backup NOW! Backup Archive (NewTech Infosystems) 
NBG NBG Clean Registry File 
NBI BackItUp Document (Ahead Software) 
NBK i-Brarian 
NBK NovaBACKUP Script (NovaStor Corporation) 
NBK Nick-O-Matic Design Factory Project (Riverdeep Interactive Learning Limited) 
NBM NetBeans Module (Sun) 
NC Graphics File 
NC Mastercam NC Programs (CNC Software, Inc.) 
NC neatComponents 
NC Numerical Control Machine Instructions 
NC Preprosessed GOC Source 
NC Unidata netCDF Graphics 
NC Geopath Machine Part File (SolutionWare Corporation) 
NC X-editor Program for CNC Machines (X-net ApS)
[༭]O ļ
O Object File 
O UNIX/GCC Object File 
O Origin C Compiled Program File (OriginLab) 
O Free Pascal Object FIle for Linux or DOS Version (FPC Development Team) 
O$$ Output File 
O$$ Sprint Outfile 
O01 Typhoon Voice File 
O1 Free Pascal Object File for GO321v1 Platform (FPC Development Team) 
O2C Objects to See 3D File Format (mb Software AG) 
O3 Ozone Messenger Program Support Files (htmlland.net) 
O8O Mediator5 Repositorytabs Vorlagen.006 File 
OAB Outlook Address Book (Microsoft) 
OAF ETH Oberon Applet File 
OAF Outrage Animation Rows 
OAF Flight Simulator Texture File (Microsoft) 
OAZ NetFax Manager OAZ Fax File 
OB IMB LinkWay Object File 
OB ABF Outlook Backup Backup File (ABF software, Inc.) 
OB$ Compressed OBJ (Microsoft) 
OB1 OzWin CompuServe E-mail/Forum Access Saved Outbox File 
OBA Timespace X100 Digital Video Recorder Video File (Electronics Services Agency) 
OCA OLE Custom Control Library Information 
OCA Visual Basic Control Typelib Cache 
OCB Origin Precompiled Origin C File (OriginLab Corporation) 
OCC DB/TextWorks Database Terms and Words 
OCC OptControlCentre Model File 
OCD OCAD Digitized Map (Steinegger Software) 
OCE Brio Query (Hyperion Solutions Corporation) 
OCF Object Craft File 
OCF OM2Cipher File 
OCM AOL Advertising Control File (America Online, Inc.) 
OCM Internet Odyssey 2 Update 
OCM Netscape Communicator Aim File 
OCP Advanced Art Studio 
OCP Offline Commander Project File 
OCR FAXGrapper FAX Text File 
OCS eDoc DigiSign Digitally Signed Document (Fujitsu Denmark) 
OCT Octalizer Musical File 
OCT Radiance Octree Format 
OCX Object Linking and Embedding (OLE) Control Extension (Microsoft) 
OC_ Doko Compressed Install File 
OD1 Omnis5 Database File 
OD2 Omnis5 Database File 
OD3 Omnis5 Database File 
OD4 Omnis5 Database File 
OD5 Omnis5 Database File 
OD6 Omnis5 Database File 
OD7 Omnis5 Database File 
OD8 Omnis5 Database File 
OD9 Omnis5 Database File 
ODA CALS Group IV Type 2 Raster Image 
ODA ODA Document 
ODA Used with OCX 
ODA AIBO Audio Voice (Sony) 
ODB ArcView Object Database ASCII File (ESRI) 
ODB Psion Organiser Datafile and LZ Diary File (Psion PLC) 
ODB OpenOffice/StarOffice OpenDocument (Ver 2) Database (Sun Microsystems, Inc.) 
ODB ABAQUS File (ABAQUS, Inc.) 
ODB Organizers Database (ODB) Database (Organizers' Collaborative) 
ODC Office Data Connection 
ODC OpenOffice/StarOffice OpenDocument (Ver 2) Chart (Sun Microsystems, Inc.) 
ODCCUBEFILE Office Data Connection 
ODCDATABASEFILE Office Data Connection 
ODCNEWFILE Office Data Connection 
ODCTABLEFILE Office Data Connection 
ODE Office Object Data Embedding File (Microsoft) 
ODF BattleZone Cartographers Guild File 
ODF OnkoS Data (OnkoS) 
ODF Open Document Interchange (ODIF) 
ODF Star Trek Armada Ship/Structure Infomation 
ODF OpenOffice/StarOffice OpenDocument (Ver 2) Formula (Sun Microsystems, Inc.) 
ODG OpenOffice/StarOffice OpenDocument (Ver 2) Graphics Document (Sun Microsystems, Inc.) 
ODH Odigo History File (Comverse, Inc. a part of Comverse Technology) 
ODI OpenOffice/StarOffice OpenDocument (Ver 2) Image (Sun Microsystems, Inc.) 
ODIF Open Document Interchange Format 
ODL Object Definition Language 
ODL Visual C++ Type Library Source (Interface Definition Language File) (Microsoft) 
ODM Opendisc Software (Opendisc) 
ODM OpenOffice/StarOffice OpenDocument (Ver 2) Global Text Document (Sun Microsystems, Inc.) 
ODP Oedipus 
ODP OpenOffice/StarOffice OpenDocument (Ver 2) Presentation (Sun Microsystems, Inc.) 
ODS NCompass Labs Internet Script 
ODS Outlook Express Mailbox (Microsoft) 
OFM Font (Adobe) 
OFM OmniForm Form File 
OFM PostScript Font Description File 
OFM OfficeForms Blank Form File (Toplevel Computing) 
OFN Office FileNew File (Microsoft) 
OFR OptimFROG Encoded Audio (Florin Ghido) 
OFT Outlook Item Template (Microsoft) 
OFX Olicom Fax 
OFX Open Financial Exchange File 
OGF OnkoS Graphic File (OnkoS) 
OGF Outrage Graphic Rows 
OGG Ogg Vorbis Codec Compressed WAV File 
OGG Origin Graphic File (OriginLab) 
OGG Salt Lake City Game File 
OGL Overlay Source Code 
OGM Ogg Vorbis Compressed Video File 
OGM Origin Matrix File (OriginLab) 
OGO OriginPro Graphic Object File (OriginLab) 
OGS Origin Script File (OriginLab) 
OGW Origin Worksheet File (OriginLab) 
OGX C++ Component Gallery Exported Classes and Resources (Borland Software Corporation) 
OH Overhoor ( DrillAssistant) List (Efkasoft) 
OH4 Overhoor ( DrillAssistant) List (Efkasoft) 
OHC OpenHelp Table of Contents File (Borland Software Corporation) 
OHI OpenHelp Index (Borland Software Corporation) 
OHL OpenHelp Link (Borland Software Corporation) 
OHP DOS 7 File 
OHP OpenHelp Project File (Borland Software Corporation) 
OHS Bink Outbound History 
OHW Overhoor ( DrillAssistant) List (Efkasoft) 
OID Prosa/OM Object Interaction Diagram 
OIF QuickBase Web-sharable Database Interchange File 
OIK Lenn3D Plant Distribution File (Lenn3D GmbH i.G.) 
OIL Open Image Library Format 
OIX Lenn3D Plant Distribution File (Lenn3D GmbH i.G.) 
OJP 3WayPack (The Three-Mode Company) 
OKS OKScript File (Mike Mardesich) 
OKT Oktalyzer Tracker Module 
OKX OKScript File (Mike Mardesich) 
OLB AUTOGEN 
OLB Automation Object Library (Microsoft Corporation) 
OLB PSpice Capture Symbols Models (OrCAD) 
OLB VAX Object Library 
OLB Medical Terminology Challenge Data File (Delmar Learning) 
OLD Old Version 
OLE Object Linking and Embedding (OLE) Object 
OLF OyezForms Legal Documents (UK) (Oyez) 
OLI Olivetti Text File 
OLK MS Mail Mailbag Lock 
OLK Outlook Address Book (Microsoft) 
OLL TrialDirector Object Load List 
OLN Visual C++ Outline Examples (Microsoft) 
OLT Visual C++ Outline Examples (Microsoft) 
OLV OnLive! Traveler Sound File (The Digital Space Commons) 
OLV OyezForms Legal Documents (UK) (Oyez) 
OM Omicron Compiler File 
OMA Sony Music Format File (Sony) 
OMD Prosa/OM Class Model 
OMF Open Media Format File 
OMG OpenMG Jukebox (Sony) 
OMN Omnipotent, Inc. Collection File 
OMO Oracle Media Objects File 
OMS Briggs Softworks Order Maven 
OMS Macintosh MP3 Music Format 
OMS Omega Downloader Configuration File 
OMX OMAX Make Tool Path File (OMAX Corporation) 
OMX Ots Media Library (Ots Labs Pty Ltd) 
ON Audio Utility Tuningwrench Compressed File 
OND Notes Database (IBM) 
ONE docPointer Visual ReadMe File (docPointer) 
ONE OneNote Note File (Microsoft) 
ONE EdgeCAM Licensing Data Ffile (Pathtrace Engineering Systems) 
ONF Open Navigation Format File 
ONX Onyx Graphics Postershop File 
OO Free Pascal Object File for OS/2 Version (FPC Development Team) 
OOM Shroom Swap File 
OOP OOP Packer Archive (TonyTown Software Ltd.) 
OP Rescue Disk File 
OP Origin Preprocessed Origin C File (OriginLab Corporation) 
OP2 Musplay 1.72 File 
OP2 Outpost 2 Saved Game 
OPA Psion OPL Object File (Psion PLC) 
OPC Beta 44 Job File 
OPC Office Upgrade Control File (Microsoft) 
OPC Omron OPC Client File 
OPD OmniPage Document (ScanSoft, Inc.) 
OPD Durango Interferometry Software Document (Diffraction International) 
OPF Flip Album File 
OPF KEPServerEX Project Configuration File (Kepware Technologies Inc.) 
OPF Gemstar eBook Publisher Package (Gemstar eBook) 
OPF Obsidium Project File (Obsidium Software) 
OPI OmniPass Exported User (Softex, Inc.) 
OPJ OrCad Project File 
OPJ Origin Project File (OriginLab) 
OPJ OmniPage Schedule (ScanSoft, Inc.) 
OPK Origin Origin Pack File (OriginLab) 
OPL Psion Organiser Programming Language Source File (Psion PLC) 
OPM Quadrox Digital CCTV System Components 
OPN Exact Active Options 
OPN Court Opinion File (Tennessee Administrative Office of the Courts) 
OPN Rebel Strip Poker Opponent File (Rebel Software) 
OPN Strip Poker Deluxe Opponent File (Eagle Rock Enterprises, Inc.) 
OPO Psion OPL Output Executable File (Psion PLC) 
OPO Psion Organiser OPL Code (Psion PLC) 
OPP IPhoto File (Keronsoft) 
OPS Office Profile Settings File (Microsoft) 
OPS Dynamite VSP Object Placement Style (3am Solutions (UK) Limited) 
OPT Delphi Project Options (Borland Software Corporation) 
OPT Developer Studio File Workspace Options (Microsoft) 
OPT Options/Configuration 
OPT ProWORX Nxt List Module Option File (Schneider Electric) 
OPT QEMM Optimize 
OPT Segue SilkTest Option Set File 
OPT Psion Organiser OPL Source (Psion PLC) 
OPT pcAnywhere Option Set File 
OPT Business Integrator Option File (Pervasive Software Inc.) 
OPW OrgPlus Organization Chart (HumanConcepts, LLC) 
OPX OrgPlus Organization Chart (HumanConcepts, LLC) 
OPX Exact Inactive Options 
OPX Flip Album File 
OPX OPL Extension DLL 
OPX OrgChart Organization Diagram (Microsoft) 
OPX Psion Organiser Programming Language (Psion PLC) 
OQY Excel OLAP Query File (Microsoft) 
OR2 Organizer Ver 2 File (IBM) 
OR3 Organizer 97 File (IBM) 
OR4 Organizer (IBM) 
OR5 Organizer (IBM) 
OR6 Organizer Data File (IBM) 
OR8 Rational Rose Oracle8 Database Model Report (IBM) 
ORA Oracle 7 Configuration 
ORC cSound Synthesis Instruments (Csounders) 
ORC Oracle 7 Script 
ORC Digital Orchestrator Plus Sound File (Voyetra Turtle Beach, Inc.) 
ORD BC45 Owl File 
ORD OMAX Make Tool Path File (OMAX Corporation) 
ORE 3WayPack (The Three-Mode Company) 
ORF Descent 3 Outrage Room Format 
ORF Olympus Digital Camera Raw Image File 
ORG Organiser (IBM) 
ORG Microcal Origin Plot 
ORG Netmino File 
ORG Origin File 
ORG Hollywood FX Effects Organizer File (Pinnacle Systems, Inc.) 
ORI Need for Speed-Hot Pursuit 2 File 
ORI Original 
ORIG Gen Original File 
ORIGINAL Netobjects Fusion Components BBScomp Message File 
ORO 3WayPack (The Three-Mode Company) 
OS3 OS/2 Warp 3 File 
OSC Formula One 2001 Options File 
OSC Fruitypro Samples SS_effects File 
OSC Remote Installation Services Client Installation Wizard File (Microsoft) 
OSD Open Software Description File (Microsoft) 
OSD SoftGrid Program Description (Softricity, Inc.) 
OSF Distribution Bin File 
OSF ICZ OriSAFE 
OSF Descent 3 Sound File (Outrage Entertainment) 
OSF Opera Skin (Opera Software ASA) 
OSG OSG321 Software Application Data File 
OSI Osiris Database (The Shmoo Group) 
OSI SunNet OSI Description File (Sun) 
OSL OckamSoft Log File (Ockam Instruments, Inc.) 
OSS Office Saved Search (Microsoft) 
OST Exchange Offline File (Microsoft) 
OST Outlook Offline File (Microsoft) 
OST Tivoli Storage Manager File (IBM) 
OTB Nokia Phone Graphics Editor (Nokia)
[༭]Pļ
PZA MGI PhotoSuite II/III/4 Album File (Sonic Solutions) 
PZC GraphPad Prism Script 
PZD Pizazz Plus Defaults 
PZF GraphPad Prism Project (GraphPad Software, Inc.) 
PZF Piezoelectric Resonance Analysis Program (PRAP) Resonance Spectrum (TASI Technical Software Inc.) 
PZH Presto Job (Soft S.A.) 
PZI Pizazz Plus Graphics File 
PZL UNIX Puzzle Bitmap 
PZL Puzzle 
PZL Jigs@w Puzzle 
PZL Lode Runner Game Puzzle 
PZM GraphPad Prism 
PZO Pizazz Plus Overlay 
PZP Pizazz Plus Palette 
PZP MGI PhotoSuite II/III/4 Project File 
PZS Pizazz Plus Settings 
PZS MGI PhotoSuite II/III/4 Slide Show File 
PZT Pizazz Plus Transfer File 
PZT GraphPad Prism Template 
PZX Pizazz Plus Swap File 
PZZ Curious Labs Compressed Poser File
[༭]Qļ
Q Unknown Apple II File (found on Golden Orchard Apple II CD Rom) 
Q Win95 Fax Queue 
Q Quantum Compressed Archive (Cinematronics) 
Q0 Q0 Graphic 
Q00 Quicken 2000 File (Intuit Inc.) 
Q01 Quicken 2001 File (Intuit Inc.) 
Q03 QuickTax Year 2003 Return (Intuit Canada) 
Q04 QuickTax Year 2004 Return (Intuit Canada) 
Q1 Winamp Equalizer Settings (Nullsoft) 
Q1A QuickClean Restore Point (Network Associates Technology, Inc.) 
Q1Q LunarCell Plug-in File 
Q1Q LunarCell Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software) 
Q2 Unknown Apple II File (found on Golden Orchard Apple II CD Rom) 
Q2Q Flexify Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software) 
Q3D Quickdraw 3D File 
Q3D Quest3D Interactive 3D File (Act-3D B.V.) 
Q3O Quick3D Model 
Q3X QuickTime QuickDraw 3D Extension (Apple Computer, Inc.) 
Q4Q Solar Cell Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software) 
Q5Q SuperBladePro Preset 
Q5R Melancholytron Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software) 
Q7Q India Ink Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software) 
Q8R Flood Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software) 
Q98 Quicken 98 File (Intuit Inc.) 
Q99 Quicken 99 File (Intuit Inc.) 
Q9Q BladePro Graphic Plug-in File 
Q9R Glitterato Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software) 
Q9S Mr. Contrast Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software) 
QAA WinQSB Data Input File (John Wiley & Sons, Inc.)
[༭]Rļ
R Pegasus Mail Resource File (David Harris) 
R Unknown Apple II File (found on Golden Orchard Apple II CD Rom) 
R Macintosh Resource Similar to RC 
R REBOL Script or Data File (REBOL Technologies) 
R Paradox File 
R Xcode Core Rez Program (Apple Computer, Inc.) 
R Progress Database Compiled Program File (Progress Software Corporation) 
R Ratfor FORTRAN Preprocessor File 
R00 WinRAR Split Compressed Archive (RarLab) 
R01 WinRAR Split Compressed Archive (RarLab) 
R02 WinRAR Split Compressed Archive (RarLab) 
R03 WinRAR Split Compressed Archive (RarLab) 
R04 WinRAR Split Compressed Archive (RarLab) 
R05 WinRAR Split Compressed Archive (RarLab) 
R06 WinRAR Split Compressed Archive (RarLab) 
R07 WinRAR Split Compressed Archive (RarLab) 
R08 WinRAR Split Compressed Archive (RarLab) 
R09 WinRAR Split Compressed Archive (RarLab) 
R1A Yamaha RM1x Dance-Music Workstation (Yamaha Corporation of America) 
R1M RealOne Metadata Package (RealNetworks) 
R1W Reflection Setting File (WRQ) 
R2A Yamaha RS7000 Music Production Studio Sequencer (Yamaha Corporation of America) 
R2A RS7000 All Data (Yahama Corporation) 
R2D RISA-2D Simple Analysis & Design 
R2D Reflex Ver. 2 Data File (Borland Software Corporation) 
R2K Repertoire 2000 Music Database 
R2P Yamaha RS7000 Music Production Studio Sequencer (Yamaha Corporation of America) 
R2P RS7000 Pattern Data (Yahama Corporation) 
R2S RS7000 Song Data (Yahama Corporation) 
R2W Reflection Setting File (WRQ) 
R3A RS7000 Sample Data (Yahama Corporation) 
R3A Yamaha RS7000 Music Production Studio Sequencer (Yamaha Corporation of America) 
R3D Realsoft 3D Image (Realsoft Graphics Oy) 
R3D Raider3D Image File (OKYZ SA) 
Rļ
