| File extension Name |
extension description |
| .A | Image Alchemy File (Handmade Software, Inc.) |
| .A | Assembly Source Code (Macintosh) |
| .A | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .A | ADA Program |
| .A | Free Pascal Archive File for Linux or DOS Version (FPC Development Team) |
| .a | UNIX Static Object Code Library |
| .A00 | Archive Section |
| .A01 | Archive Section |
| .A01 | OzWin CompuServe E-mail/Forum Access SYSOP File |
| .A01 | ARJ Multi-volume Compressed Archive (can be 01 to 99) (also see .000) (can be 01 to 99) (also see .000) |
| .A02 | OzWin CompuServe E-mail/Forum Access SYSOP File |
| .A02 | Archive Section |
| .A03 | Archive Section |
| .A03 | OzWin CompuServe E-mail/Forum Access SYSOP File |
| .A03 | annotare ava 04 Project File (annotare.net) |
| .A04 | Archive Section |
| .A04 | OzWin CompuServe E-mail/Forum Access SYSOP File |
| .A05 | Archive Section |
| .A05 | OzWin CompuServe E-mail/Forum Access SYSOP File |
| .A06 | OzWin CompuServe E-mail/Forum Access SYSOP File |
| .A06 | Lotto Pro 2002 Smart Number Ticket |
| .A06 | Archive Section |
| .A07 | TaxCalc Tax File (Acorah Software Products Ltd.) |
| .A07 | OzWin CompuServe E-mail/Forum Access SYSOP File |
| .A07 | Archive Section |
| .A08 | Archive Section |
| .A08 | OzWin CompuServe E-mail/Forum Access SYSOP File |
| .A09 | OzWin CompuServe E-mail/Forum Access SYSOP File |
| .A09 | Archive Section |
| .A1 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .A1 | Free Pascal Archive File for GO321v1 Platform (FPC Development Team) |
| .A10 | OzWin CompuServe E-mail/Forum Access SYSOP File |
| .A11 | AOL Instant Messenger (AIM) Graphic (America Online, Inc.) |
| .A2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .A21 | Soundweb Firmware File (BSS Audio) |
| .A2A | Sharp APL Workspace Export File |
| .A2A | IBM Voice Type Language Vocabels File |
| .A2A | APLASCII EISPACK |
| .A2B | A2B Player Playlist (DigitalPhono.com) |
| .A2BPS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .A2C | Alice Scene File (Carnegie Mellon University) |
| .A2DOM | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .A2M | AudioToMidi Settings |
| .A2M | AdLib Tracker 2 |
| .A2PROBPS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .A2R | KittyXplorer Encrypted Archive (MyPlanet Software) |
| .A2W | Alice Program (World) File (Carnegie Mellon University) |
| .A3 | Unrelated Inventions Audiotools Show Log |
| .A3 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .A31 | Authorware Ver. 3.x Library (Adobe Systems Incorporated) |
| .A3D | Amapi 3D Modeling (Eovia) |
| .A3K | Yamaha A3000 Sampler File (Yamaha Corporation of America) |
| .A3L | Authorware Ver. 3.x Library (Adobe Systems Incorporated) |
| .A3M | Authorware Unpackaged Macintosh FIle (Adobe Systems Incorporated) |
| .A3W | Authorware Unpackaged Windows File (Adobe Systems Incorporated) |
| .A41 | Authorware Ver. 4.x Library (Adobe Systems Incorporated) |
| .A4L | Authorware Ver. 4.x Library (Adobe Systems Incorporated) |
| .A4M | Authorware Unpackaged Macintosh File (Adobe Systems Incorporated) |
| .A4P | Authorware File Without Runtime (Adobe Systems Incorporated) |
| .A4R | Authorware Packaged Course File (Adobe Systems Incorporated) |
| .A4W | Authorware Unpackaged Windows File (Adobe Systems Incorporated) |
| .A51 | Authorware Ver. 5.x Library (Adobe Systems Incorporated) |
| .A52 | Atari 5200 Game Image (Atari) |
| .A5L | Authorware Ver. 5.x Library (Adobe Systems Incorporated) |
| .A5W | Alpha Five Web Publishing Page (Alpha Software, Inc.) |
| .A5W | Authorware Unpackaged Windows File (Adobe Systems Incorporated) |
| .A60 | Roland Garros Tennis MVTS File |
| .A64 | Nintendo 64 Memory Pak Note Hex Export (Nintendo) |
| .A64 | Artist 64 |
| .A65 | Authorware v6.5 File (Adobe Systems Incorporated) |
| .A68 | PDP-10 Algol-68 Compiler Source |
| .A6P | Authorware Application (Adobe Systems Incorporated) |
| .A78 | Atari 7800 ROM Image (Atari) |
| .A8 | Image Alchemy File (Handmade Software, Inc.) |
| .A8 | Cubicomp PictureMaker 24bit 3D Animation |
| .A86 | A86 Assembler Source Code |
| .AA | Audio Book |
| .AA | PROGNOSIS Automated Analyst Document File |
| .AAA | Xtal Backup |
| .AAA | Sybase SQLAnywhere Temp File |
| .AAA | Softphrase Automation File |
| .AAA | App Cam Automation |
| .AAB | Authorware Binary (Adobe Systems Incorporated) |
| .AAC | MPEG-2 Advanced Audio Coding File |
| .AAF | Advanced Authoring Format File |
| .AAM | Authorware Shocked File (Map) (Adobe Systems Incorporated) |
| .AAO | Agenda at Once Database File (Dataland Software) |
| .AAO | America's Army Map |
| .AAP | LexNavigator Information Update (UltraTech Group) |
| .AAP | Apollo Advanced Playlist |
| .AAPKG | ArchestrA IDE Package (Invensys) |
| .AAR | Axis Archive (Apache Software Foundation) |
| .AAS | Audible Words File (Audible, Inc.) |
| .AAS | Authorware Shocked Packet (Segment) (Adobe Systems Incorporated) |
| .AAS | Bong Script File |
| .AAS | Star Trek Elite Force Bot Support File (Raven Software) |
| .AAS | Movie Clip; Autodesk Animation Setup; used by Compton's Reference Collection |
| .AAS | Archos Signed/Encrypted Data (ARCHOS) |
| .AAT | Arcinfo Line Data Attribute Data |
| .AATREND | ActiveFactory Trend File (Invensys Systems, Inc.) |
| .AAX | Audible Enhanced Audio File (Audible, Inc.) |
| .AB | Applix Builder |
| .AB$ | AutoCAD Spooled Plot (Autodesk, Inc.) |
| .AB1 | ABIF Applied Biosystems Inc. Format (Applied Biosystems) |
| .AB1 | Chromas Lite Nucleotide Sequence Analysis Results (Technelysium Pty Ltd) |
| .AB2 | Parson's Address Book |
| .AB3 | PhotoImpact Album File |
| .AB4 | ENIAC Computing AB4 Accounting & Business File |
| .AB6 | AB Stat Data |
| .AB8 | AB Stat Data |
| .ABA | Palm Address Book File (Palm, Inc.) |
| .ABA | Avant Browser Add-on (Avant Force) |
| .ABAP | ABAP Source Code (SAP AG) |
| .ABC | ABC Programming Language |
| .ABC | Musical Notation Language File |
| .ABC | ACT! E-mail Address Book File (Best Software CRM Division) |
| .ABC | LithTech Game 3D Model (Touchdown Entertainment, Inc.) |
| .ABC | Athena 16 Address Book |
| .ABC | FlowCharter Data File (iGrafx (a division of Corel Inc.)) |
| .ABC | Pro-Act |
| .ABD | The Bat! Address Book (RITLABS) |
| .ABD | AmBiz Bonus Calculator Data File |
| .ABD | Adventure Builder Database |
| .ABF | Altair Binary Format |
| .ABF | Binary Screen Font (Adobe Systems Incorporated) |
| .ABFS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ABG | Fifa World Cup Game Data File |
| .ABI | AOL 6 Organizer (America Online, Inc.) |
| .ABI | Chromas Nucleotide Sequence Analysis Results (Technelysium Pty Ltd) |
| .ABI | ABI- CODER (ABI- Software Development) |
| .ABI | dnaLIMS ABI Trace File (dnaTools) |
| .ABK | AMOS Music Bank |
| .ABK | Need for Speed: Underground Audio File (Electronic Arts, Inc.) |
| .ABK | AMOS Basic Data (SPSS Inc.) |
| .ABK | Corel Draw AutoBackup |
| .ABK | HP-95LX Appointment Book File |
| .ABK | Ability Office Write Document Backup (Ability Software) |
| .ABK | Any Automatic Backup |
| .ABL | ADONIS Application Library Export (BOC Group) |
| .ABL | Maxagrid Avails Data File |
| .ABL | Xilinx Integrated Software Environment ABEL Hardware Description Language (Xilinx, Inc.) |
| .ABM | Album |
| .ABM | HitPlayer Audio Album File |
| .ABM | Photo Impressions Album (ArcSoft, Inc.) |
| .ABM | Audition On-line Dance Battle Music (T3 Entertainment Co., LTD.) |
| .ABO | Applix Builder Turbo |
| .ABOUT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ABOUTIT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ABP | AVS Barcode Source Barcode Profile (Alver Valley Software) |
| .ABR | Photoshop Brush (Adobe Systems Incorporated) |
| .ABS | Absolute Database Database (ComponentAce) |
| .ABS | Absolute Packager Configuration File (Xceed Software Inc.) |
| .ABS | MPEG Audio Sound File |
| .ABS | Optocat |
| .ABS | Abscissa Data File |
| .ABS | PC GNU Compiler Output |
| .ABS | AB SuDoKu Sudoku Save Game (Andrei Baronov) |
| .ABS | Avant Browser Skin (Avant Force) |
| .ABS | Abstracts |
| .ABT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ABT | The Arbiter Sports Official Schedule |
| .ABU | ACT! E-mail Address Book File (Best Software CRM Division) |
| .ABW | AbiWord Document File (The AbiSource Community) |
| .ABX | WordPerfect Address Book File (Corel Corporation) |
| .ABY | AOL Address Book (America Online, Inc.) |
| .ABZ | AbszOrb |
| .AC | ACwin Project Data (Procedimientos-Uno, S.L.) |
| .AC | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AC | AC3D Geometry File (Inivis) |
| .AC | CaseWare Working Papers Client File |
| .AC$ | AutoCAD Undo Info (Autodesk, Inc.) |
| .AC1 | Weaver Spider Software (Weaver Spider Software) |
| .AC2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AC3 | AC3 Audio File Format |
| .ACA | Project Manager Workbench File |
| .ACA | Agent Character (Microsoft Corporation) |
| .ACAD | AutoCAD Database (Autodesk, Inc.) |
| .ACB | Photoshop Color Book (Adobe Systems Incorporated) |
| .ACB | AOL Cab Launcher (America Online, Inc.) |
| .ACB | ACMB Graphic Image |
| .ACC | Graphic Accounts Accounts Data (FKJ Software) |
| .ACC | DR-DOS Viewmax File |
| .ACC | Composer File (Microsoft Corporation) |
| .ACC | Atari ST Executable |
| .ACCDB | Access 2007 Database File (Microsoft Corporation) |
| .ACCESS | Java Access Control File (Sun) |
| .ACCESS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ACCESSPRIV | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ACCOLADE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ACCORD | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ACCT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ACD | Nascar Racing 2002 Arcade Car Setup (Sierra) |
| .ACD | Sonic Foundry Acid Music File (Sony Corporation of America) |
| .ACD | Agent Character Definition (Microsoft Corporation) |
| .ACD | Chromeleon Channel Raw Data |
| .ACD | RSLogix 5000 Project File (Rockwell Automation) |
| .ACD | allCLEAR Flowcharting File |
| .ACD | Alan Game |
| .ACE | Aces200 |
| .ACE | Jupiter Ace Snapshot |
| .ACE | WinAce Compressed File (e-merge GmbH) |
| .ACE | BioPerl DNA Data Exchange Format (BioPerl Project) |
| .ACE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ACE | Casting Electronic Enterprise CV Archive (Casting Electronic) |
| .ACE | Train Simulator Texture File (Microsoft Corporation) |
| .ACF | DB/TextWorks Database Access Control File (Inmagic, Inc.) |
| .ACF | X-Plane Plane Description File (Laminar Research) |
| .ACF | Photoshop Custom Filter (Adobe Systems Incorporated) |
| .ACF | Agent Character (Microsoft Corporation) |
| .ACF | Spectramap Application Colors File (Coloritto BV) |
| .ACF | AdviceCalculator (JRK Software) |
| .ACG | Agent Preview (Microsoft Corporation) |
| .ACG | Age of Wonders Saved Game (Triumph Studios) |
| .ACGD | ACG Case-Mix System ACG Predictive Model (Johns Hopkins University) |
| .ACGI | AppleSearch CGI Interface |
| .ACGL | ACG Case-Mix System License File (Johns Hopkins University) |
| .ACH | Medlin Accounting Automated Clearing House File (Medlin Accounting) |
| .ACH | Rockwell Software Logix 5 File |
| .ACH | Payroll Mate 2008 Automated Clearing House File (RealTaxTools.com) |
| .ACH | Speccy Snapshot |
| .ACI | ACI Development Appraisal |
| .ACIDBAT2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ACL | Corel Draw 6 Keyboard Accelerator |
| .ACL | RaidenFTPD Rights File |
| .ACL | Access Control List (Microsoft Corporation) |
| .ACL | ArchiCrypt Live Secured Data Volume (Exklamate Software) |
| .ACL | ACL Desktop for Windows Data File (ACL Services Ltd.) |
| .ACL | Office AutoCorrect List (Microsoft Corporation) |
| .ACLOCK | Amazing clock (Amazing-Clock.com) |
| .ACM | ACBM Image File |
| .ACM | Photoshop Command Button (Adobe Systems Incorporated) |
| .ACM | Windows System File |
| .ACM | Interplay Compressed Sound File |
| .ACM | Movie File in some games |
| .ACM | Audio Compression Manager Driver (Microsoft Corporation) |
| .ACM | American Civil War File (Interactive Magic) |
| .ACM | Infinity Game Engine Sound (BioWare Corp.) |
| .ACMB | Graphics File |
| .ACMD | Apache Commander Project (Zecos Software) |
| .ACO | Fast-Talk Acoustic Model File (Fast-Talk Communications, Inc.) |
| .ACO | Photoshop Color Swatch File (Adobe Systems Incorporated) |
| .ACO | ArCon Project (TRIXL GmbH) |
| .ACORN | Acorn Image (Apple Inc.) |
| .ACP | ArCon Project (ArCon-Shop.com) |
| .ACP | TCPDUMP Style Capture |
| .ACP | ACB Compressed File Archive |
| .ACP | Action! Document (Macromedia) |
| .ACP | EditPlus Auto Completion File (ES-Computing) |
| .ACP | Acrobat Paper Capture Temporary File (Adobe Systems Incorporated) |
| .ACP | Office Assistant Preview File (Microsoft Corporation) |
| .ACQ | AcqURL |
| .ACQ | AcquTach+ (Acquisition Systems) |
| .ACR | American College of Radiology (American College of Radiology) |
| .ACR | Dicom |
| .ACR | Medlin Accounting Accrual Method Adjustments (Unpaid Invoices) (Medlin Accounting) |
| .ACS | Agent Character (Microsoft Corporation) |
| .ACSM | Adobe Digital Editions Adobe Content Server Message (Adobe) |
| .ACT | ADPCM Compressed File Recorded by Some MP3 Players/Voice Recorders |
| .ACT | Photoshop Color Table (Adobe Systems Incorporated) |
| .ACT | Office Actor Program File (Microsoft Corporation) |
| .ACT | Action! Presentation (Macromedia) |
| .ACT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ACT | Animation:Master Action (Hash) |
| .ACT | FoxPro Documenting Wizard Action Diagram (Microsoft Corporation) |
| .ACT | Train Simulator Activity File (Microsoft Corporation) |
| .ACT | DataWave Physiological Data File |
| .ACTH | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ACTH2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ACTH3 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ACTION | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ACTIONNDA | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ACTIONS | Photoline4 Defaults File |
| .ACTIONSCRIPT | Flash ActionScript Source Code (Adobe Systems Incorporated) |
| .ACTPROJ | Visual Studio .NET ACT Project (Microsoft Corporation) |
| .ACU | AppleLink-PE Compression Format |
| .ACU | ACUCOBOL-GT Intermediate Object File (Acucorp, Inc.) |
| .ACU | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ACV | Photoshop Saved Curve (Adobe Systems Incorporated) |
| .ACV | OS/2 Audio Drivers |
| .ACW | American Civil War Game Save File (Interactive Magic) |
| .ACW | AutoCaption Worksheet File (Image Logic Corporation) |
| .ACW | Accessibility Wizard Settings (Microsoft Corporation) |
| .ACX | Atari ST Executable |
| .ACX | Rational XDE (IBM) |
| .ACX | FOCUS/WebFOCUS File Description |
| .AC_ | CaseWare Working Papers Compressed Client File (CaseWare International Inc.) |
| .AC_ | Creativ compressed Sb16 sbide file |
| .AD | AxSys Script File (Genomic Solutions) |
| .AD | Ascend Password Protocol |
| .AD | After Dark Screen Saver |
| .AD | AppleDouble Encoded File (Apple Inc.) |
| .AD | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ad | UNIX Application Default Resource File |
| .AD! | OzWin CompuServe E-mail/Forum Access QS-Special - Get Marked Online |
| .AD2 | ad2 Web Page Script File (ad2, Inc.) |
| .AD2 | Compressed Voice File |
| .AD3 | Compressed Voice File |
| .ada | ADA Program |
| .ADA | Advanced Digital Audio Compressed Audio |
| .ADA | ActiveDocs Answer Set |
| .ADB | ExpressEnterprise Server Stamping File (Adlib Software) |
| .ADB | Alphacam Diecut VB Macro (Planit) |
| .ADB | Alpha Five Database Information File (Alpha Software, Inc.) |
| .ADB | Advanced Integrated Maintenance Support System (AIMSS) Runtime Project Configuration File (Raytheon Company) |
| .ADB | Ability Office Database (Ability Software) |
| .ADB | ACT! Activity Data File (Best Software CRM Division) |
| .ADB | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ADB | ALLDATA |
| .ADB | CorelCENTRAL Address Book (Corel Corporation) |
| .ADB | HP 100LX Organizer Appointment Database |
| .adb | ADA Package Body |
| .ADB1 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ADB2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ADBA | Advanced Integrated Maintenance Support System (AIMSS) Author Project Configuration File (Raytheon Company) |
| .ADBLOCK | Alpha Five Temporary Locking File (Alpha Software, Inc.) |
| .ADC | TI/MIT ADC Format Sound |
| .ADC | Scanstudio 16-color Bitmap Graphic File |
| .ADC | Lingvo Dictionary Text File |
| .ADC | Chromeleon Demo Data File |
| .ADC | ClearSight Analyzer Trace File (ClearSight Networks, Inc.) |
| .ADC | ADC Data Acquistion |
| .ADC | ActiveDocs Clipping Catalog |
| .ADC | Systems Management Server (SMS) Collection Evaluator Addition (Microsoft Corporation) |
| .ADC | XMap ImageReg Output File (Delorme) |
| .ADD | OS/2 Adapter Device Driver |
| .ADD | Alphacam Diecut Drawing (Planit) |
| .ADD | Advantage Database Server Data Dictionary (Sybase, Inc.) |
| .ADD | PageMaker (Adobe Systems Incorporated) |
| .ADDEND | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ADDENDUM | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ADDRESS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ADDRESSES | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ADE | Access Project Extension (Microsoft Corporation) |
| .ADE | ADC Audio File |
| .ADEX | ADEX Corporation ChromaGraph Graphics Card Bitmap Graphic |
| .ADF | Antenna Data File |
| .ADF | I-DEAS Associated Data File (EDS) |
| .ADF | Grand Theft Auto Vice City Radio Station (Rockstar Games) |
| .ADF | Dog Creek QC Mask File |
| .ADF | MicroSim PCBoard Photoplot Aperture Definition File |
| .ADF | Actual Drawing File |
| .ADF | Adapter Description File |
| .ADF | Admin Config File |
| .ADF | Amiga Disk File (Amiga) |
| .ADF | Game File |
| .ADF | ArcView ARC/INFO Coverage Data File (ESRI) |
| .ADF | ReliaSoft ALTA 1 |
| .ADF | A.R.S.E.N.A.L. Extended Power Main Game File (Tactical Soft) |
| .ADF | Wyatt Technology ASTRA(r)Chromatography |
| .ADI | AutoCAD Plotter File (Autodesk, Inc.) |
| .ADI | Advantage Database Server Database Index File (Sybase, Inc.) |
| .ADI | Amateur Data Interchange Format (ADIF) File |
| .ADINEKIRN | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ADIUMEMOTICON | Adium Dock Icons (The Adium Team) |
| .ADIUMEMOTICONSET | Adium Emoticon Set (The Adium Team) |
| .ADIUMMENUBARICONS | Adium Menu Bar Icons (The Adium Team) |
| .ADIUMMESSAGESTYLE | Adium Message Style (The Adium Team) |
| .ADIUMPLUGIN | Adium Plug-in (The Adium Team) |
| .ADIUMSCRIPTS | Adium AppleScripts (The Adium Team) |
| .ADIUMSERVICEICONS | Adium Service Icons (The Adium Team) |
| .ADIUMSOUNDSET | Adium Sound Set (The Adium Team) |
| .ADIUMSTATUSICONS | Adium Status Icons (The Adium Team) |
| .ADJ | LISCAD Plus Adjustment File |
| .ADJUST | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ADK | OS/2 Saved SKF Format File (IBM) |
| .ADL | OzWin CompuServe E-mail/Forum Access QS-Special Get Marked |
| .ADL | QEMM MCA Adapter Description Library |
| .ADL | openEHR Archetype Definition Language File (openEHR Foundation) |
| .ADL | ADONIS Models and Model Groups Export From Database (BOC Group) |
| .ADL | DESQview (Symantec Corporation) |
| .ADM | Adobe CS4 Application Bar (Adobe Systems Incorporated) |
| .ADM | Windows Policy Template (Microsoft Corporation) |
| .ADM | SCSI Driver |
| .ADM | Portfolio Admin-level Acces Flag (Extensis, Inc.) |
| .ADM | After Dark Screen Saver Module |
| .ADM | Addict Compiled Dictionary (Addictive Software) |
| .ADM | Advantage Database Server Database Memo File (Sybase, Inc.) |
| .ADM | Alphacam Diecut Parameter Macro (Planit) |
| .ADML | Windows/Office Language Specific Group Policy Settings (Microsoft Corporation) |
| .ADMX | Windows/Office Group Policy Settings (Microsoft Corporation) |
| .ADN | 1-2-3 Add-in Utility (IBM) |
| .ADN | Access Blank Project Template (Microsoft Corporation) |
| .ADO | Photoshop Duotone Options (Adobe Systems Incorporated) |
| .ADO | Stata Program |
| .ADOBENET | Studio Snapshot Tool Application (Adobe Systems Incorporated) |
| .ADOC | Authentica Secure Office Protected Word Document (Authentica) |
| .ADOS | ADOS Compound Document (ADOS Corporation) |
| .ADP | FaxWorks Modem Setup File |
| .ADP | Alphacam Diecut Post (Planit) |
| .ADP | Astound Dynamite |
| .ADP | Access Project (Microsoft Corporation) |
| .ADP | AOL Server Dynamic Page (America Online, Inc.) |
| .ADPCM | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ADPCM | Intel/DVI Adaptive Differential Pulse Code Modulation Format Sound |
| .ADR | XAIRON-Addy Address Manager Data File |
| .ADR | Opera Web Browser Bookmark File (Hotlist) (Opera Software ASA) |
| .ADR | After Dark Random Screen Saver Module |
| .ADR | Address Plus Database |
| .ADR | Address Book |
| .ADR | Opera Default Bookmark File (Opera Software ASA) |
| .ADR | Smart Address Address Book |
| .ADRESSES | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ads | ADA Package Specification |
| .ADS | ADS Applications File (Autodesk, Inc.) |
| .ADSM | Advanced Split Machine Split File |
| .ADT | Casio Travel Phrase Database (Casio Computer Co., Ltd.) |
| .ADT | Alphacam Diecut Tools (Planit) |
| .ADT | HP NewWave Card Application Data File |
| .ADT | MediSoft Database Dictionary File |
| .ADT | AutoCAD Audit Report (Autodesk, Inc.) |
| .ADT | Advantage Database Server Database File (Sybase, Inc.) |
| .ADT | AdTech Fax |
| .ADT | ACT! Document Template (Best Software CRM Division) |
| .ADT | Troj/Agent-GCO |
| .ADT | Lingvo Dictionary File |
| .ADU | Addict User Dictionary (Addictive Software) |
| .ADV | TAPCIS Advanced Commands (User Entered) |
| .ADV | GUS Virtual Device Driver |
| .ADVENTURE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ADW | ADHAWIN Multilingual Transliteration Scheme |
| .ADX | Dreamcast Audio File (Sega) |
| .ADX | Approach Index File (IBM) |
| .ADX | Dynazip Active Delivery Script |
| .ADX | Archetype Designer Document |
| .ADZ | Amiga GZ-Packed Disk Image (Amiga) |
| .AE | SoftQuad Author/Editor File |
| .AEB | Alphacam Wire EDM VB Macro (Planit) |
| .AEC | DataCAD Double Precision Drawing (DATACAD LLC) |
| .AED | Alphacam Wire EDM Drawing (Planit) |
| .AEF | ELECTRICAL Designer |
| .AEF | Visual Objects Application Export File (CA) |
| .AEG | Netmino File |
| .AEH | iPer Advanced Embedded Hypertext (Visual Vision) |
| .AEM | Alphacam Wire EDM Parameter Macro (Planit) |
| .AEP | Homeworld (Sierra Entertainment, Inc.) |
| .AEP | After Effects Project File (Adobe Systems Incorporated) |
| .AEP | Alphacam Wire EDM Post (Planit) |
| .AEP | ArcExplorer Project (Environmental Systems Research Institute, Inc. (ESRI)) |
| .AER | Atmosphere File (Adobe Systems Incorporated) |
| .AES | AES Crypt Encrypted File (Packetizer, Inc.) |
| .AES | After Effects Stablilzer Settings (Adobe Systems Incorporated) |
| .AET | After Effects Tracker Settings (Adobe Systems Incorporated) |
| .AEU | AutoRoute Express Europe Route (Microsoft Corporation) |
| .AEX | Art Explosion Greeting Card Factory Deluxe Graphic (Nova Development Corporation) |
| .AEX | Alpha Five Compiled Add-in Library Script (Alpha Software, Inc.) |
| .AEX | Pretty Good Privacy (PGP) Armored Extracted Public Encryption Key (PGP Corporation) |
| .AEXPK | Pretty Good Privacy (PGP) Armored Extracted Public Key (PGP Corporation) |
| .AF | 3DPlus2 Model (Serif) |
| .AF2 | ABC Flowchart |
| .AF3 | FlowCharter Ver. 3 & 4 (iGrafx (a division of Corel Inc.)) |
| .AFB | Alphacam Flame VB Macro (Planit) |
| .AFC | Apple Sound (Apple Inc.) |
| .AFC | ArisFlow Commander |
| .AFD | Prismo Graphics ActiveFile Data (Apple Inc.) |
| .AFD | Alphacam Flame Drawing (Planit) |
| .AFD | ArisFlow Diagram |
| .AFF | Advanced Forensics Format Disk Image (Simson L. Garfinkel and Basis Technology Corp) |
| .AFF | AGEMA File |
| .AFF | Affix File |
| .AFF | AnyForm Form |
| .AFFAIR | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AFG | Guitar Musik Trainer File |
| .AFI | Truevision Bitmap Graphic |
| .AFL | XMap (Delorme) |
| .AFL | X-Plane Airfoil (Laminar Research) |
| .AFL | Lotus Font (IBM) |
| .AFL | AnimaFlex RubberFlex Animation |
| .AFM | DESQview (Symantec Corporation) |
| .AFM | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AFM | FormMaster Editor Form Template (AT SYSTEMS S.R.L.) |
| .AFM | Abassis Finance Manager Data File (SmartMedia Informatica) |
| .AFM | HP NewWave Cardfile Application |
| .AFM | Outline Font Metric (Adobe Systems Incorporated) |
| .AFM | LOUT File |
| .AFM | Alphacam Flame Parameter Macro (Planit) |
| .AFO-XVID | RAR-compressed Video |
| .AFP | Androsa FileProtector Encrypted File (AndrosaSoft) |
| .AFP | XMap Flight Plan or Flight Plan Statistic File (Delorme) |
| .AFP | Flowchart Symbol Palette |
| .AFP | Alphacam Flame Post (Planit) |
| .AFP | Prismo Graphics ActiveFile Proxy (Apple Inc.) |
| .AFP | Papyrus Document Storage Format |
| .AFP | IBM Transactional Data Format (Advanced Function Print) |
| .AFP | Gangsters Game File |
| .AFS | Sega Dreamcast Compressed Audio (Sega of America, Inc.) |
| .AFS | Type Manager Font Set (Adobe Systems Incorporated) |
| .AFS | Filter Factory Photoshop Filter |
| .AFS3 | Advanced File Security Encrypted File (Osborne Software - Eric P??rsel) |
| .AFT | AnyForm Template |
| .AFT | Ancestry Family Tree Data File (MyFamily.com Inc.) |
| .AFT | Flowchart Template |
| .AFTER | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AFW | Industrial Aspect Integrator Platform (ABB Ltd) |
| .AFW | Flowchart Work Area |
| .AFX | Auto FX Photographic Edges (Auto FX Software) |
| .AFZ | Ancestry Family Tree Backup Data File (MyFamily.com Inc.) |
| .AG | Agenda Application (IBM) |
| .AG | Argus Spreadsheet |
| .AG | Applix Graphic (Applix) |
| .AG4 | Access G4 File (Microsoft Corporation) |
| .AGC | AfterGRASP Compiled Script (John Bridges) |
| .AGE3SCN | Age of Empires 3 Scenario (Microsoft Corporation) |
| .AGF | Atlas GeoFile |
| .AGG | Graphic |
| .AGG | AggFlow Plant Flow Diagram (BedRock Software Inc.) |
| .AGI | Asterisk Gateway Interface File (Digium, Inc.) |
| .AGL | ChangeCAST AGL File (Domain Systems, Inc.) |
| .AGL | PC Fold Angle Correction Data |
| .AGL | AGLData Industrial Water Treatment File |
| .AGL | ArgusLab Molecular Design (Planaria Software LLC) |
| .AGL | Compaq Array Visualizer Native Data Format (Hewlett-Packard Development Company, L.P.) |
| .AGLDEI | GoLive Template (Adobe Systems Incorporated) |
| .AGLS | GoLive Snippet (Adobe Systems Incorporated) |
| .AGLSL | GoLive Site (Adobe Systems Incorporated) |
| .AGM | DOTAGM.JAR Packed Audio File (agm digital arts GmbH) |
| .AGN | Psion Series 3 Agenda (Psion PLC) |
| .AGO | Autolog Script (Soft Machines) |
| .AGP | Aspen Graphics Pages |
| .AGP | AppGini MySQL Code Generator Project (BigProf Software) |
| .AGR | Grace Project File |
| .AGR | Aepryus Graph Image or Screen Saver File (Aepryus Software) |
| .AGR | APM Graph Vector Graphic (APM) |
| .AGREEMNT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AGS | AppGini Saved Style Sheet (BigProf Software) |
| .AGS | AfterGRASP Script (John Bridges) |
| .AGT | PeerAgent Typed Executable E-mail |
| .AGW | Aspen Graphics Windows |
| .AGX | Rational XDE (IBM) |
| .AGZ | AggFlow Aggregate Plant Flow Diagram (BedRock Software Inc.) |
| .AH | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AHB | AIM High Briefcase Report File (Cosby Clifton Computer Consultants Ltd) |
| .AHD | Asus Probe |
| .AHF | ASP Header |
| .AHK | AutoHotkey Script (AutoHotkey) |
| .AHOD | Homeworld (Sierra Entertainment, Inc.) |
| .AHP | AutoCAD Help (Autodesk, Inc.) |
| .AHQ | AudioHQ Plug-in Module |
| .AHS | Photoshop Halftone Screens (Adobe Systems Incorporated) |
| .AHTM | HTML File |
| .AHTML | HTML File |
| .AHUFF | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AHX | WinAHX THX Tracker Music (Abyss) |
| .AI | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AI | Progress Database After Image File (Progress Software Corporation) |
| .AI | Rise of Nations AI File (Microsoft Corporation) |
| .AI | Illustrator Vector Graphic (Adobe Systems Incorporated) |
| .AI | EARS Component File |
| .AI | Corel Trace Drawing |
| .AI | Advantage Database Server (Sybase, Inc.) |
| .AI | AIwin Project Data (Procedimientos-Uno, S.L.) |
| .AI | Ai Archiver Archive |
| .AI3 | Generic Encapsulated PostScript Graphic Format |
| .AI4 | Generic Encapsulated PostScript Graphic Format |
| .AI5 | Generic Encapsulated PostScript Graphic Format |
| .AI6 | Generic Encapsulated PostScript Graphic Format |
| .AI7 | Generic Encapsulated PostScript Graphic Format |
| .AIC | Advanced Image Coding Bitmap |
| .AIF | Audio Interchange File |
| .AIF | OS/2 Program Information File (IBM) |
| .AIF | Knowledgeware Setup Information |
| .AIF | SymbianOS Application Information File |
| .AIFC | Audio Interchange File |
| .AIFF | Audio Interchange File |
| .AIG | Abracadata Drawing |
| .AIG | Design Your Own Home Architecture Drawing File (theliquidateher Software, An MCS Investments, Inc. Company) |
| .AIH | ArcView Optional Index File (ESRI) |
| .AII | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AIJ | Oracle After-Image Journal |
| .AIL | AutoImager |
| .AIM | Asm Text Mode Image File (The Ultimate Draw) |
| .AIM | AOL Instant Messenger (AIM) (America Online, Inc.) |
| .AIML | Artificial Intelligence Markup Language |
| .AIN | AIN Compressed Archive |
| .AIN | ArcView Optional Index File (ESRI) |
| .AINSO | VAX CRYSTALS Chemical Crystallogaphy File |
| .AIO | APL File Transfer Format |
| .AIP | Star Trek Armada Arficicial Intelligence Parameters |
| .AIP | Advanced Installer Project File (Caphyon Ltd.) |
| .AIP | Illustrator Plug-in (Adobe Systems Incorporated) |
| .AIP | Audiosoft Parameter File |
| .AIQ | AzureIQ Client |
| .AIR | Flight Simulator Aircraft Performance Info File (Microsoft Corporation) |
| .AIR | Automatic Image Registration |
| .AIR | Align It! Resource |
| .AIR | SeeYou Airspace (Naviter) |
| .AIR | AIR Rich Internet Application (Adobe Systems Incorporated) |
| .AIRPORT | RealFlight Radio Control Flying Site (Knife Edge Software) |
| .AIRPORTS | RealFlight Radio Control Flying Site (Knife Edge Software) |
| .AIS | Velvet Studio Instruments |
| .AIS | ACDSee Image Sequence File (ACD Systems Ltd.) |
| .AIS | Array of Intensity Samples |
| .AIT | Illustrator Template (Adobe Systems Incorporated) |
| .AIV | Stronghold Crusader Computer Player AI (Firefly Studios Ltd.) |
| .AIW | Formula 1 car race 2001 Season01 School France file |
| .AIX | HP NewWave Cardfile Application Data |
| .AJA | AJC Active Backup Backup Revision Control Archive (AJC Software) |
| .AJB | Alphacam Water Jet VB Macro (Planit) |
| .AJD | Alphacam Water Jet Drawing (Planit) |
| .AJG | AJC Grep Project File (AJC Software) |
| .AJL | ARCserve Backup Journal File (Computer Associates International, Inc.) |
| .AJM | Alphacam Water Jet Parameter Macro (Planit) |
| .AJP | Anfy Applet Generator Saved File (Anfy Team) |
| .AJP | Alphacam Water Jet Post (Planit) |
| .AJP | JPEG2000 Digital Surveillance Recorder Video |
| .AJZ | Jukebox MP3 Player Firmware Update (Archos) |
| .AK | Audio Utility Tuningwrench Compressed File |
| .AKF | Acrobat Key File (Adobe Systems Incorporated) |
| .AKM | Aksharamala Binary Keymap File (Deshweb.com Pvt. Ltd.) |
| .AKM | Microsoft Operation Manager (MOM) Management Pack (Binary) (Microsoft Corporation) |
| .AKS | Aksharamala Ver 2.0 Binary Keymap File (Deshweb.com Pvt. Ltd.) |
| .AKT | Aksharamala Source Keymap File (Deshweb.com Pvt. Ltd.) |
| .AKT | AKT Compressed Archive |
| .AKW | RoboHELP Help Project Index File |
| .AL | ALAW Format Sound |
| .AL | Oracle File |
| .AL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .al | Perl Autoload File |
| .AL$ | Cubase Compressed File (Steinberg) |
| .ALA | Alan Adventure Language File |
| .ALA | Sharp Fax File |
| .ALANIS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ALAW | ALAW Format Sound |
| .ALB | Photo Soap2 File |
| .ALB | Image Commander Album (Corel Corporation) |
| .ALB | Chief Architect Library File (Chief Architect) |
| .ALB | Web Easy Album (VCOM/Avanquest Publishing USA, Inc.) |
| .ALB | Pro/DESKTOP Album (PTC) |
| .ALB | AVSnap Symbol Library (ALTINEX, Inc.) |
| .ALB | Alpha Five Data Dictionary (Alpha Software, Inc.) |
| .ALB | Raduga Playlist (WoLoSoft) |
| .ALB | Cubase or VST Backup Song File (Steinberg) |
| .ALB | Alphacam Laser VB Macro (Planit) |
| .ALBINON | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ALBM | webAlbum Photo Album (Goopers - Logan Mueller) |
| .ALBM | Photosmart Photo Printing Album (Hewlett-Packard Development Company, L.P.) |
| .ALC | ACUCOBOL-GT License File (Acucorp, Inc.) |
| .ALC | Norton Internet Security Ad Server File |
| .ALC | Alchemy Chemical Format (CambridgeSoft Corporation) |
| .ALC | MP3 Embedded Dynamic Lyrics |
| .ALD | Aladdin Interactive DSP Document (Hitech Development AB) |
| .ALD | Alphacam Laser Drawing (Planit) |
| .ALDOC | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ALDRIN | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ALE | Avid Log Exchange |
| .ALERT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ALF | LANDesk Client Manager Configuration File |
| .ALF | Cadence Ambit BuildGates |
| .ALF | Aventail Connect License |
| .ALF | Airpro 2000 Landfile |
| .ALF | ALF Logic |
| .ALF | AdventNet Look and Feel Standards |
| .ALF | ACT! User Logon Tracking (Best Software CRM Division) |
| .ALF | Abacus Law (Abacus Data Systems, Inc.) |
| .ALF | Altium Designer License File (Altium Limited) |
| .ALF | Color Quick Label |
| .ALF | VPCom Remote User Configuration File |
| .ALG | ARCSOLO Activity Log |
| .ALG | PDP-10 ALGOL Compiler Source |
| .ALG | InRoads Survey Alignment File (Bentley Systems, Incorporated) |
| .ALG | Netmino File |
| .ALH | Aladdin Interactive DSP Model Header File (Hitech Development AB) |
| .ALI | DESQview (Symantec Corporation) |
| .ALI | SAP Proprietary Format Document File |
| .ALI | OM2 OMALI Native OMALI Document |
| .ALI | Inspect3D Aligned Image Stack (FEI Company) |
| .ALIAS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ALIAS | Alias Image |
| .ALIASES | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ALIEN | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ALIEN1 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ALIGN | Insight II Sequence Alignment File (Accelrys Software Inc.) |
| .ALL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ALL | OS/2 Program List (IBM) |
| .ALL | 1-2-3 Always Working Page Format File (IBM) |
| .ALL | WordPerfect Printer Info (Corel Corporation) |
| .ALL | Cubase or VST Song File (Steinberg) |
| .ALL | FRQView File List of All Files |
| .ALL | Arts & Letters Symbols and Characters |
| .ALLIANCE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ALLOCM | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ALM | Alpha Five Database Information File (Alpha Software, Inc.) |
| .ALM | Alphacam Laser Parameter Macro (Planit) |
| .ALM | AL-Mail Mailbox File (AL-Mail) |
| .ALM | Aley's Module v1.0, 1.1, 1.2 |
| .ALN | LexNavigator Database Update (UltraTech Group) |
| .ALN | Grlib Saoimage File |
| .ALO | Almanac Support File |
| .ALONE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ALP | Alphacam Laser Post (Planit) |
| .ALPHA | Raw Alpha Bytes Bitmap |
| .ALPHA | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ALPHAB | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ALR | ADRIFT Language Resource (ADRIFT) |
| .ALR | VirusScan Alert File (Network Associates) |
| .ALS | Alias Image |
| .ALS | PSpice Alias File (Cadence Design Systems, Inc.) |
| .ALS | Ableton Live Studio Recording File (Ableton AG) |
| .ALS | Calmira Shortcut File |
| .ALS | Live Project (Ableton AG) |
| .ALS | Arcade Lines Graphic Resource File (Lobstersoft) |
| .ALS | Pro/ENGINEER Temporary File (PTC) |
| .ALT | ReliaSoft ALTA 6 |
| .ALT | WordPerfect Menu File (Corel Corporation) |
| .ALT | Aladdin Interactive DSP Message Text (Hitech Development AB) |
| .ALTO | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ALV | Vbox Available Languages File (Aladdin Knowledge Systems) |
| .ALV | Photoshop Levels (Adobe Systems Incorporated) |
| .ALW | PDP-10 Algol-W Compiler Source |
| .ALX | Alpha Five Library Index (Alpha Software, Inc.) |
| .ALX | OM2 OMALI Plug-in Extension |
| .ALX | BlackBerry Application Loader File (Research in Motion Limited) |
| .ALX | ActiveX Layout File (Microsoft Corporation) |
| .ALYSIS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ALZ | ALZip Compressed File (ESTsoft, Corp.) |
| .ALZ | Game File |
| .AL_ | Audio Utility Juker Compressed File |
| .AM | Music File |
| .AM | Applix SHELF Macro |
| .AM | Anark Studio Media File (Anark) |
| .AM | Advantage Database Server (Sybase, Inc.) |
| .am | Automake Autoload File |
| .AM1 | Adventure Maker Project File (Giovanni Albani) |
| .AM2 | AutoPlay Menu Studio Ver. 2 Data File (Indigo Rose Software) |
| .AM3 | AutoPlay Menu Studio Ver. 3 Data File (Indigo Rose Software) |
| .AM4 | AutoPlay Menu Studio Ver. 4 Data File (Indigo Rose Software) |
| .AM5 | AutoPlay Menu Studio Ver. 5 Data File (Indigo Rose Software) |
| .AM6 | AutoPlay Menu Studio Ver. 6 Data File (Indigo Rose Software) |
| .AMA | Fifa2000 Feart File |
| .AMAT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AMAYA | Amaya |
| .AMB | Radiance Ambient File Format |
| .AMB | All My Books Book Database (Bolide Software) |
| .AMB | Alphacam 3D Mill, 2D Mill VB Macro (Planit) |
| .AMC | Ant Movie Catalog |
| .AMC | Wireless Analyzer Captured Data (AirMagnet) |
| .AMD | AMUSIC AdLib Tracker |
| .AMD | ABBYY Finereader 5.0 Pro File (ABBYY Software House) |
| .AMD | Alphacam 3D Mill, 2D Mill Drawing (Planit) |
| .AMD | ASCET XML Model Description (ETAS GmbH) |
| .AME | ACT! E-mail System Library (Best Software CRM Division) |
| .AMERICA | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AMF | Anquet Map (Anquet Technology Ltd.) |
| .AMF | Amiga Metafile (Amiga) |
| .AMF | Advanced Module Format Music |
| .AMF | Autolog Macro (Soft Machines) |
| .AMF | ADRIFT Module File (ADRIFT) |
| .AMF | DSMIA/Asylum Module Music |
| .AMFF | Amiga Metafile (Amiga) |
| .AMG | AMG ACTOR System Image |
| .AMG | Netmino File |
| .AMG | AMGC Compressed Archive |
| .AMI | Amiga Paint File (Amiga) |
| .AMI | Cocreate SolidDesigner Annotation File |
| .AMI | AMI BIOS Firmware Update File (American Megatrends Inc.) |
| .AMIGA | Amiga (Amiga) |
| .AMIGA | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AML | Morpheus Photo Morpher Layout Project (Morpheus Software, LLC.) |
| .AML | AutoMage |
| .AML | Mio Technology Application Markup Language (Mioplanet Technologies, Inc.) |
| .AML | SAS Activity-Based Management Model File (SAS Institute Inc.) |
| .AMM | All My Movies Movie Database (Bolide Software) |
| .AMM | Microphone Modeler Model File (Antares Audio Technologies) |
| .AMM | AMM |
| .AMM | Alphacam 3D Mill, 2D Mill Parameter Macro (Planit) |
| .AMM | Orchida Knitting System (Orchida Soft) |
| .AMODEL | ActiveModeler Professional Project File (KAISHA-Tec Co. Ltd.) |
| .AMOS | AMOS Basic Code |
| .AMP | Alphacam 3D Mill, 2D Mill Post (Planit) |
| .AMP | Connectivity Memory Model AMPA and NMDA Parameters Input File |
| .AMP | PlayMedia AMP MP3 Audio File |
| .AMP | Photoshop Arbitrary Map Settings (Adobe Systems Incorporated) |
| .AMPER | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AMR | Adaptive Multi-Rate ACELP Codec |
| .AMS | Extreme's Tracker Module Format |
| .AMS | Photoshop Monitor Setup (Adobe Systems Incorporated) |
| .AMS | Velvet Studio Module |
| .AMT | Alphacam 3D Mill, 2D Mill Tool (Planit) |
| .AMT | AVSnap Project (ALTINEX, Inc.) |
| .AMT | ABBYY Finereader 5.0 Pro (ABBYY Software House) |
| .AMT | ArtMoney Table (ArtMoney Team) |
| .AMV | MTV Movie File |
| .AMW | WinScript Show Data (Alcorn McBride Inc.) |
| .AMW | AMOS Data |
| .AMX | After Effects Motion Exchange File (Adobe Systems Incorporated) |
| .AMX | MetaMOD Half-Life Plug-in |
| .AMXX | AMX Mod X Plug-in (AMX Mod X Dev Team) |
| .AMY | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AMZ | Amazon MP3 Downloader Download/Control File (Amazon.com, Inc.) |
| .AMZ | The Amazon Trail Saved Game |
| .AN | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AN | Groundworks Text File |
| .AN1 | Street Atlas Draw File (Delorme) |
| .AN1 | WWG DA-30 Capture File |
| .AN1 | XMap Draw File (Delorme) |
| .AN8 | Anim8or 3D Animation |
| .ANA | Analysis for Windows Structure (Cuylaerts Engineering) |
| .ANAL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANALASIS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANAT | XNBC V8 Biological Neural Network Simulation Workstation Network Anatomy |
| .ANB | Analyst's Notebook Analytical Chart (i2 Ltd.) |
| .ANC | Alphacam NC Program (Planit) |
| .ANC | Canon Computer Pattern Maker File |
| .ANCESTRY | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AND | Collins Electronic Dictionary Data (Windows) / Concise Oxford Dictionary (DOS) |
| .ANF | AcuteNotes |
| .ANG | AIMSUN NG Network (TSS-Transport Simulation Systems) |
| .ANGELES | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANI | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANI | NEOchrome Animation |
| .ANI | Windows Animated Cursor (Microsoft Corporation) |
| .ANI | NeroMix File (Nero AG) |
| .ANIM | Homeworld (Sierra Entertainment, Inc.) |
| .ANIM | Amiga IFF Animation (Amiga) |
| .ANIM | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANIM3 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANIM5 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANIM50 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANIMAL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANIMALS1 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANIMALS2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANIMALS3 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANIMASIA | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANIMATION | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANIMDEMO | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANIMTOOL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANKI | Anki Deck File (Damien Elmes) |
| .ANL | Eisenbahn.exe Professionell Railroad Track Layout (Software Untergrund) |
| .ANL | Annotis Mail Language File (Emeris Technologies) |
| .ANL | Alphacam Nest List (Planit) |
| .ANL | Project Analyzer Saved Analysis |
| .ANM | Animatic Animation File |
| .ANM | Jazz Jackrabbit 2 Title Sets Images (Epic Games, Inc.) |
| .ANM | DeluxPaint Animation |
| .ANM | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANM | Infinity Equation Script (MathRevolt) |
| .ANN | Help Annotation |
| .ANN | King-FIX |
| .ANNOT | Amaya Annotation |
| .ANO | Annotation |
| .ANP | Annotis Mail (Emeris Technologies) |
| .ANR | Street Atlas Route File (Delorme) |
| .ANR | XMap Route File (Delorme) |
| .ANS | ANSI Graphic/Text |
| .ANS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANS | Word Text and Layout (Microsoft Corporation) |
| .ANS | HotDocs Answer File (Matthew Bender & Company, a member of the LexisNexis Group) |
| .ANS | ANSYS Model Data (ANSYS, Inc.) |
| .ANS2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ANSR | AnswerTool Question/Answer Document (DTLink LLC) |
| .ANT | SimAnt for Windows Saved Game File |
| .ANT | calcAnt Saved Calculation (SFR GmbH) |
| .ANTIFRAG | DC++ Incomplete Download |
| .ANV | AirNav |
| .ANX | HotDocs Answer File (Matthew Bender & Company, a member of the LexisNexis Group) |
| .ANX | Ogg Multiplex Profile |
| .ANYDVD | AnyDVD Registration File (SlySoft) |
| .AO | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AO | Free Pascal Archive File for OS/2 Version (FPC Development Team) |
| .AO | ActionOutline Data File (Green Parrots Software) |
| .AO | AOL Install Archive (America Online, Inc.) |
| .AOB | DVD Audio File |
| .AOF | Acorn Object Format |
| .AOI | Art of Illusion Scene File (Peter Eastman) |
| .AOL | AOL (America Online, Inc.) |
| .AOM | After Effects Output Settings (Adobe Systems Incorporated) |
| .AOM | Download Manager Online Manager Shortcut (Adobe Systems Incorporated) |
| .AOMVER | Adobe Download Manager Version File (Adobe Systems Incorporated) |
| .AOR | Searchlight AR3000/AR3000A Radio Scanner Frequency Listing (AOR UK LTD) |
| .AOS | Gmini Firmware Update (ARCHOS) |
| .AOS | Archos Signed/Encrypted Data (ARCHOS) |
| .AOS | Nokia Phone Add-on Software (Nokia) |
| .AOT | Novell snAppShot Application Binary Object Template File |
| .AP | Datalex EntryPoint 90 Data File |
| .AP | Applix Presents |
| .AP | ArmPack Archive File |
| .AP | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AP | WHAP-Compressed Amiga Archive |
| .AP0 | Windows APW_data File |
| .AP? | LoseThos C+ Source File (Terry A. Davis) |
| .APA | ArcPad Ver. 6 Applet |
| .APA | AlfaPad Notes Organizer Document (AlfaAlfa Software) |
| .APB | Avram's PC Backup File List (QuadraSoft) |
| .APB | Apollo Suite Planogram (Information Resources, Inc.) |
| .APB | Alphacam Punch VB Macro (Planit) |
| .APC | Lotus Printer Driver Characters (IBM) |
| .APC | Gupta Team Developer Compiled Application File |
| .APC | AiroPeek Wireless Trace Capture File (WildPackets, Inc.) |
| .APC | APAC Compressed Audio |
| .APC | Cryo Interactive APC Audio |
| .APD | Gupta Team Developer Dynamic Application Library File |
| .APD | Alphacam Punch Drawing (Planit) |
| .APD | Lotus Printer Driver (IBM) |
| .APD | PageMaker Printer Description (Adobe Systems Incorporated) |
| .APE | Winamp Plug-ins AVS File |
| .APE | Monkey's Audio Lossless Audio Compression Format (Matthew T. Ashland) |
| .APF | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .APF | ATO Profile Editor File (E2S n.v.) |
| .APF | Acrobat Profile File (Adobe Systems Incorporated) |
| .APF | Homesite Project File |
| .APF | Speedy Printed Circuit Board Design Software (Mania Technologie) |
| .APF | ArcPad Ver. 5 Profile |
| .APF | Fax2000 File |
| .APF | MightyFax File |
| .APF | Lotus Printer Driver Fonts (IBM) |
| .APF2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .APG | Graphic |
| .APG | EasyBase Database File (Pg SoftWorkS') |
| .APG | PowerAda Aprobe File (OC Systmes) |
| .APG | Active Page Generator APG Script (Webgecko Software) |
| .APH | Ability Office Photo Album (Ability Software) |
| .API | Photoshop Ink Colors Setup (Adobe Systems Incorporated) |
| .API | Acrobat Plug-in (Adobe Systems Incorporated) |
| .API | Application Program Interface |
| .API | Lotus Printer Driver Info (IBM) |
| .API | WebObjects Interface (Apple Inc.) |
| .API | 1st Reader Passed Parameter File |
| .APIN | InDesign Import/Export Filter (Adobe Systems Incorporated) |
| .APJ | Angel Debug Monitor Project |
| .APJ | ARM Project Manager |
| .APJ | Music Screen Saver File |
| .APK | Android Package (Open Handset Alliance) |
| .APK | Active Tutor Project (4C Media, Inc.) |
| .APK | Train Simulator Packaged Activity (Microsoft Corporation) |
| .APK | GameSpy Arcade Service (IGN Entertainment, Inc.) |
| .APL | ACDSee Plug-in (ACD Systems) |
| .APL | Monkey's Audio Image Link File (Matthew T. Ashland) |
| .APL | Gupta Team Developer Application Library File |
| .APL | ArcPad Ver. 6 Layer |
| .APL | APL Workspace/Source |
| .APLN | InDesign 3rd Party Plug-in (Adobe Systems Incorporated) |
| .APLWRKS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .APLWRKSGS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .APM | Alphacam Punch Parameter Macro (Planit) |
| .APM | Aldus Placeable Metafiles (Adobe Systems Incorporated) |
| .APM | AutoPlay Menu Studio Configuration (Indigo Rose Software) |
| .APM | ArcPad Ver. 6 |
| .APN | APN Wallpaper (Alpine Electronics, Inc.) |
| .APO | Apollo Scripts |
| .APO | Paperless Office (Abacre) |
| .APP | OrbWorks PocketC CE Application |
| .APP | Psion Oval Application (Psion PLC) |
| .APP | Ca Visual Objects Platform for Developer (CAVO) Project File (CA) |
| .APP | VTech Helio Application (VTech Holdings Ltd.) |
| .APP | Until Application |
| .APP | Cybiko Computer Application File (Cybiko, Inc.) |
| .APP | Video CD on CD-i Application |
| .APP | Clarion for Windows Application (SoftVelocity) |
| .APP | Gupta Team Developer Normal Mode Application File |
| .APP | ArcPad Ver. 5 Project |
| .APP | R:Base, Symphony, DR-DOS, FoxPro (or other) Application |
| .APP | dBASE Application Object File |
| .APP | Lotus Symphony Add-in Application |
| .APP | Executable Application |
| .APP | SymbianOS Application (Symbian Ltd.) |
| .APP | Alphacam Punch Post (Planit) |
| .APP | Timex Data Link Watch Application (Timex Corporation.) |
| .APPL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .APPLE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .APPLE2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .APPLESCRIPT | AppleScript Script (Apple Inc.) |
| .APPLESHARE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .APPLESOF | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .APPLEWKS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .APPLICATION | ClickOnce Deployment Manifest (Microsoft Corporation) |
| .APPM | APPM Gereedschapskist Document (TPM-webapplicaties) |
| .APPREF-MS | Application Reference File (Microsoft Corporation) |
| .APPS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .APPT | Authentica Secure Office Protected PowerPoint Document (Authentica) |
| .APR | ArcView Project File (ESRI) |
| .APR | Various Appraisal Software Appraisal File (PRIMEDIA Business Magazines & Media Inc.) |
| .APR | MicroSim PCBoard Aperture Information Report |
| .APR | Employee Appraiser Performance Review File |
| .APR | Approach 97 File (IBM) |
| .APRJ | ApacheConf Project (Zecos Software) |
| .APS | Visual C++ File (Microsoft Corporation) |
| .APS | ArcPad Ver. 5 Symbology |
| .APS | Flash |
| .APS | Advanced Patching Systems with Error Checking |
| .APT | appTranslator Project (appTranslator) |
| .APT | AutoPlay Menu Studio Project File (Indigo Rose Software) |
| .APT | Alphacam Punch Tool (Planit) |
| .APT | Nimbus 7 SAMS Data File |
| .APT | Gupta Team Developer Text Mode Application File |
| .APT | Approach Data View File (IBM) |
| .APT | Adaptive Prediction Tree APT Encoded Bitmap (John Robinson) |
| .APV | EdiAPV.exe (VP PRECISION S.A.) |
| .APV | ApiViewer API Database (ActiveVB) |
| .APV | Acerose Password Vault Password File (Dexadine, Inc.) |
| .APV | Speedy Printed Circuit Board Design Software (Mania Technologie) |
| .APW | Authorware Packaged FIle (Adobe Systems Incorporated) |
| .APW | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .APW | Any Password Password File (RomanLab Software) |
| .APWKS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .APX | Ability Office Photopaint Image (Ability Software) |
| .APX | ArcPad Ver/ 6 XML File |
| .APX | Approach Paradox-specific Information File (IBM) |
| .APX | TheTomb Browser APX Webfile (Apoltix) |
| .APX | C++ Appexpert Database (Borland Software Corporation) |
| .APZ | AutoPlay Menu Studio Shared Project File (Indigo Rose Software) |
| .AP_ | C Poet Compressed Disk1 File |
| .AQ | Ancestral Quest Genealogy File (Incline Software, LC) |
| .AQ | Applix Data |
| .AQ1 | AptiQuiz Test File (RJ Software) |
| .AQA | AptiQuiz Test Result (RJ Software) |
| .AQF | Aquifer Content Management System Aquifer-Generated Web Page (Liquid Development, LLP) |
| .AQL | AOL Windows DLL (America Online, Inc.) |
| .AQM | CP/M Information File |
| .AQQ | AQQ Plug-in (AQQ Team) |
| .AR | AIX Small Indexed Archive |
| .AR | Midtown Madness City Add-on (Microsoft Corporation) |
| .AR | UNIX Library |
| .AR | Javasoft JRE 1.3 Library File |
| .ARA | ATI Radeon Video Driver |
| .ARB | Alphacam Router VB Macro (Planit) |
| .ARB | ARB Sequence Database (Department of Microbiology, TUM, Munich, Germany) |
| .ARC | Archive |
| .ARC | Schedule+ 1.0 File (Microsoft Corporation) |
| .ARC | FreeArc Compressed File |
| .ARC | Insight II Cartesian Coordinate Archive File (Accelrys Software Inc.) |
| .ARCADE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ARCANE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ARCH | Illum Source Dotfiles File |
| .ARCH00 | F.E.A.R. Game Archive (Monolith Productions, Inc.) |
| .ARCHIE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ARCHIMEDES | Speccy Snapshot |
| .ARCHITECT | London Architect Design File (BSS Audio) |
| .ARCHITECT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ARD | Alphacam Router Drawing (Planit) |
| .ARE | Infinity Game Engine Area Description (BioWare Corp.) |
| .ARE | BioWare Aurora Engine Area (BioWare Corp.) |
| .ARF | Automatic Response File |
| .ARF | Active Tutor Data (4C Media, Inc.) |
| .ARF | AOL Instant Messenger (AIM) Resource File (America Online, Inc.) |
| .ARF | Flexible Image Transport System Bitmap |
| .ARG | HDF Fort_ps File |
| .ARG | AutoCAD Profile Export (Autodesk, Inc.) |
| .ARGO | ArgoUML Project |
| .ARH | ArHymo Hydrologic Simulation |
| .ARH | Archivers Definitions File (DN) |
| .ARI | Aristotle Audio |
| .ARI | Compressed Archive |
| .ARJ | Compressed Archive |
| .ARJ | Robert Jung ARJ Compressed Archive |
| .ARK | CP/M Information File |
| .ARK | QuArk Compressed File Archive |
| .ARK | Managing Your Money Achive |
| .ARK3 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ARKCHEAT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ARL | AOL Organizer (America Online, Inc.) |
| .ARLOLD | AOL 6 Organizer (America Online, Inc.) |
| .ARM | Alphacam Router Parmeter Macro (Planit) |
| .ARM | Armadillo Software Protection System |
| .ARM | Acorn ROM/Disk Image File |
| .ARM | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ARMADA | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ARMOURFONT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ARMX | ASP.NET Source File (Microsoft Corporation) |
| .ARMY | Impossible Creatures Collection of Created Creatures (Microsoft Corporation) |
| .ARN | Astronomical Research Network |
| .ARN | XMap Flight Plan or Flight Plan Statistic File (Delorme) |
| .ARN | CD Autorun Creator Package (DSW Software Team) |
| .ARO | SteelArrow Web Application Server Script (Tomahawk Technologies) |
| .ARP | Alphacam Router Post (Planit) |
| .ARP | Audition Play Data (Adobe Systems Incorporated) |
| .ARP | Ahsomme Accounting Package Report Layout Template (Simple Solutions) |
| .ARPX8 | Techno Toys Arp-X8 MIDI Arpeggiator File |
| .ARQ | Compressed Archive |
| .ARQ | Remedy Action Request System Client Macro |
| .ARR | Atari Cubase Arrangement (Steinberg) |
| .ARR | Remedy Action Request System Client Report |
| .ARR | Amber ARR Bitmap Image |
| .ARR | MicroImages Value Array (MicroImages, Inc.) |
| .ARS | After Effects Render Settings (Adobe Systems Incorporated) |
| .ARS | Artifax Report Editor |
| .ART | Clip Art File |
| .ART | Compressed Archive |
| .ART | Duke Nukem 3D Archive |
| .ART | Alphacam Router Tool (Planit) |
| .ART | pfs:Art Publisher |
| .ART | Vort image |
| .ART | Xara Studio Drawing (Xara) |
| .ART | ArtCAM Pro and ArtCAM Insignia Model Data (Delcam plc) |
| .ART | Central Point Scrapbook |
| .ART | Canon Crayola Art File |
| .ART | Art Director Image |
| .ART | AOL Johnson-Grace Compressed File (America Online, Inc.) |
| .ART | Bernina Artista Design |
| .ART | Another Ray Tracer Format |
| .ART | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ART | First Publisher Raster Graphic |
| .ART | Blood Archive |
| .ART | Canon Crayola Art File |
| .ART | ARTiSAN Real-time Studio |
| .ARTGALLERY | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ARTICLE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ARTICLE1 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ARV | Eschalon Setup Archive (Eschelon Development (24-2979 Panorama Dr., Coquitlam BC V3E 2W8, Canada)) |
| .ARV | AutoRoute User Information (Microsoft Corporation) |
| .ARV | Arsiv |
| .ARW | Sony RAW Image File (Sony Corporation of America) |
| .ARX | ARX Compressed Archive |
| .ARX | AutoCAD Runtime Extension (Autodesk, Inc.) |
| .ARY | Compaq SmartStart Scripting Toolkit File |
| .AS | Macromedia Flash Action Script |
| .AS | Applix Spreadsheet (Applix) |
| .AS | Dispatch Alaska/Horizon Timetable File (Scott Andrew Borton) |
| .AS | AppleSingle Encoded File (Apple Inc.) |
| .AS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AS | Flash ActionScript Source Code (Adobe Systems Incorporated) |
| .AS3 | Alternate Sources Data |
| .AS3 | APL*PLUS II/386 and III/Windows Source Code |
| .AS4 | AS/400 Client Access |
| .AS? | LoseThos Assembly Source File (Terry A. Davis) |
| .ASA | Active Server Document |
| .ASA | Visual InterDev File (Microsoft Corporation) |
| .ASAX | ASP.NET Source File (Microsoft Corporation) |
| .ASB | Alphacam Stone VB Macro (Planit) |
| .ASC | Flash Server-Side ActionScript (Adobe Systems Incorporated) |
| .ASC | ASCII Text |
| .ASC | 3D Studio 3D Scene (Autodesk, Inc.) |
| .ASC | 3D Point File |
| .ASC | Atlantis Word Processor Spellchecker (Rising Sun Solutions, Inc.) |
| .ASC | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ASC | ADONIS AdoScript File (BOC Group) |
| .ASC | Pretty Good Privacy (PGP) Armored Encrypted File (PGP Corporation) |
| .ASC | Apohysis Script (The Apohysis Project) |
| .ASCII | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ASCX | Web User Control (Microsoft Corporation) |
| .ASD | Origins Embroidery Design (Origins Software Technologies, Inc.) |
| .ASD | Lotus Screen Driver (IBM) |
| .ASD | Advanced Streaming Format Description (Microsoft Corporation) |
| .ASD | Alphacam Stone Drawing (Planit) |
| .ASD | Word Automatic Backup (Microsoft Corporation) |
| .ASD | ASD Archiver Compressed Archive |
| .ASD | Astound Presentation |
| .ASD | Live Audio Analysis File (Ableton AG) |
| .ASE | 3ds Max ASCII Export File (Autodesk, Inc.) |
| .ASE | Adobe Swatch Exchange (Adobe Systems Incorporated) |
| .ASE | Alice Scene Export File (Carnegie Mellon University) |
| .ASE | Velvet Studio Sample |
| .ASF | STATGRAPHICS Data File (Manugistics, Inc.) |
| .ASF | FIFA Football 2004 Audio File (Electronic Arts, Inc.) |
| .ASF | Lotus Screen Font (IBM) |
| .ASF | APL*Plus /PC APL Shared File |
| .ASF | Advanced Streaming Format (Microsoft Corporation) |
| .ASF | Electronic Arts Music File (Electronic Arts, Inc.) |
| .ASG | Airport Tycoon Saved Game (Global Star Software) |
| .ASH | TASM Assembler Header |
| .ASH | Sony DSC-F828 Firmware Upgrade File (Sony) |
| .ASHDISC | Burning Studio Disc Image File (Ashampoo GMBH & Co.) |
| .ASHDISK | Ashampoo Burning Studio Disk Image (ashampoo GmbH & Co. KG) |
| .ASHPRJ | Burning Studio Project (Ashampoo GMBH & Co.) |
| .ASHX | ASP.NET Web Handler File (Microsoft Corporation) |
| .ASI | Assembler Include (Borland Software Corporation) |
| .ASIC | ASIC Language Source Code |
| .ASJ | Aldfaer |
| .ASK | Ad-Aware Skin File (Lavasoft) |
| .ASK | Daqarta Extended Audio Data (Interstellar Research) |
| .ASK | askSam Database (askSam Systems) |
| .ASK | Astrotite Skin (Fantiusen Software) |
| .ASK | ALShow Media Player Skin (ESTsoft) |
| .ASL | Quest Adventure Game (Axe Software) |
| .ASL | Photoshop Layer Style (Adobe Systems Incorporated) |
| .ASL | AppSight Console Log (Identify Software Ltd.) |
| .ASL | Asmodo 9s |
| .ASLQUERY | OS X Console Query (Apple Inc.) |
| .ASM | Solid Edge Document (UGS PLM Solutions) |
| .ASM | Alphacam Stone Parameter Macro (Planit) |
| .ASM | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ASM | Pro/ENGINEER Assembly File (PTC) |
| .ASM | Assembler Source Language |
| .ASM1 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ASM2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ASM3 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ASMVERS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ASMX | ASP.NET Webservices Source |
| .ASN | GameSpy Arcade Skin (IGN Entertainment, Inc.) |
| .ASN | Atlantis Word Processor Sound Scheme (Rising Sun Solutions, Inc.) |
| .ASN | Chemical Interchange Format (Old Form) |
| .ASN1 | Asn Specs |
| .ASND | Soundbooth Sound Document (Adobe Systems Incorporated) |
| .ASO | Flash Cache File (Adobe Systems Incorporated) |
| .ASO | Assembler Object |
| .ASO | Astound Dynamite Objects |
| .ASP | Aspen/2 Data Manager (Tekton Software, Inc.) |
| .ASP | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ASP | Text Data |
| .ASP | Terminal Program |
| .ASP | Software Publishing Corp. |
| .ASP | Procomm Plus ASPECT Program |
| .ASP | Photoshop Photo File Index (Adobe Systems Incorporated) |
| .ASP | Alphacam Stone Post (Planit) |
| .ASP | Active Server Page |
| .ASP | EROSION 3D Aspect File |
| .ASP | ASAP WordPower WebShow Presentation |
| .ASP | Photoshop Separation Setup (Adobe Systems Incorporated) |
| .ASP | Astound Presentation |
| .ASPHTML | ASP HTML (Microsoft Corporation) |
| .ASPI | Audio Catalyst |
| .ASPR | ASProtect (ASPACK SOFTWARE) |
| .ASPX | ASP.NET Source File (Microsoft Corporation) |
| .ASR | Photoshop Scratch Area (Adobe Systems Incorporated) |
| .ASR | Streets & Trips Route (Microsoft Corporation) |
| .ASS | Flash |
| .ASS | Assistance for the Blind |
| .ASS | Assembler/Disassembler 68HC11 |
| .ASS | Aegisub Advanced SubStation Alpha Subtitle File (Rodrigo Braz Monteiro) |
| .ASS | ASS I/O |
| .ASS | Media Player Classic Subtitle |
| .ASSIGNED | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ASSOC | Associate This File Association Database (Spearit) |
| .AST | Ability Office Spreadsheet (Ability Software) |
| .AST | Astound Multimedia |
| .AST | Claris Works Assistant File |
| .AST | AstroGrav Simulation Data File (AstroGrav Astronomy Software) |
| .AST | AST Audio Stream (Nintendo) |
| .AST | Need for Speed: Underground Audio File (Electronic Arts, Inc.) |
| .AST | Technics Sx KN 6000 Keyboard All Custom Memory File |
| .AST | Photoshop Separation Tables (Adobe Systems Incorporated) |
| .AST2 | Astrotite (Fantiusen Software) |
| .ASTROGS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ASV | MATLAB Autosave File (The MathWorks, Inc.) |
| .ASV | DataCAD Autosave File (DATACAD LLC) |
| .ASV | Photoshop Selective Color (Adobe Systems Incorporated) |
| .ASV | Pegasus Mail Auto Saved Message (David Harris) |
| .ASV | NotePad 2004 (Finale) |
| .ASV | Train Simulator Computed Activity File (Microsoft Corporation) |
| .ASV | QuarkXpress Auto Save File (Quark, Inc.) |
| .ASWCS | avast! Antivirus Skin (ALWIL Software) |
| .ASWS | avast! Antivirus Skin (ALWIL Software) |
| .ASX | Alpha Five Temporary Index (Alpha Software, Inc.) |
| .ASX | Cheyenne Backup Script |
| .ASX | ActiveSite Extension (Jonathon Rossi) |
| .ASX | Advanced Stream Redirector File (Microsoft Corporation) |
| .ASXML | AudioPlayer XML Music Playlist (Adrian Wright) |
| .ASY | LTspice/SwitcherCAD III Circuit Diagram (Linear Technology) |
| .ASZ | LoseThos Assembly Source File (Terry A. Davis) |
| .AS_ | Winhelp Compressed File |
| .AT | Rescue Disk file |
| .AT2 | Persuasion Ver. 2.0 Auto Template (Adobe Systems Incorporated) |
| .AT2 | WinControl DCX-AT3000 Motion Control Command Language File (Precision MicroControl Corp.) |
| .AT3 | Airport Tycoon Version 3 Saved Game (Global Star Software) |
| .AT3 | Playstation Audio File (Sony Corporation of America) |
| .AT3 | WinControl DCX-AT3000 Motion Control Command Language File (Precision MicroControl Corp.) |
| .AT5 | NauticPath Marine Electronic Chart (Lowrance) |
| .AT5 | Lowrance Airport AirMap File (Lowrance) |
| .ATA | Antenna Project (Julian Spencer) |
| .ATB | Alphacam Lathe VB Macro (Planit) |
| .ATB | TechMed Annotation ToolBar (TechMed) |
| .ATC | AutoCAD Catalog (Autodesk, Inc.) |
| .ATC | AceText Collection (JGsoft - Just Great Software) |
| .ATC | Sniffer Capture File (Network Associates Technology, Inc.) |
| .ATD | MS Systems Management Server SMSADDIN.EXE tool registration |
| .ATD | Alphacam Lathe Drawing (Planit) |
| .ATF | Sharp APL Workspace Export File |
| .ATF | Photoshop Transfer Function (Adobe Systems Incorporated) |
| .ATF | GenePix Axon Text File (Molecular Devices Corporation) |
| .ATF | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ATG | Netmino File |
| .ATH | Alphacam Lathe Thread (Planit) |
| .ATH | Athena Document (Bertil Rolf and Charlotte Magnusson) |
| .ATHEME | Amazing clock Theme (Amazing-Clock.com) |
| .ATK | Andrew Toolkit Raster Object Bitmap |
| .ATL | Hal/Supernova/Lunar/LunarPlus Screen Readers/Magnifiers |
| .ATL | ATP Assembler Source (Brancepeth Computer Publications) |
| .ATL | PROGNOSIS Atlas Document File |
| .ATL | AutoTap Log File (B&B Electronics Mfg) |
| .ATLT2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ATM | Alphacam Lathe Parameter Macro (Planit) |
| .ATM | Terragen Light and Atmosphere (Planetside Software) |
| .ATM | .nugthat Player (Nuggets Unlimited, Inc.) |
| .ATM | Vue Atmospheres (e-on software, inc.) |
| .ATM | Type Manager Data File (Adobe Systems Incorporated) |
| .ATM | The Universal 3D Model/Texture File (The Universal Development Team) |
| .ATM | Trojan ProAgent-A |
| .ATMN | Automation Anywhere Automation Macro (Tethys Solutions, LLC.) |
| .ATMSPHR | TerragGen Atmosphere (Planetside Software) |
| .ATN | Photoshop Action File (Adobe Systems Incorporated) |
| .ATN | Daqarta Extended Audio Data (Interstellar Research) |
| .ATO | Just Burn File (Sonic Solutions) |
| .ATO | ATO Modeler Project File (E2S n.v.) |
| .ATOM | Atom Feed |
| .ATOOL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ATP | Anti Tracks Plug-in (RIGHT Utilities, Inc.) |
| .ATP | ATRAC Coded File |
| .ATP | Alphacam Lathe Post (Planit) |
| .ATP | Visual Studio .NET ACT Project (Microsoft Corporation) |
| .ATP | Automise Project File (VSoft Technologies Pty Ltd.) |
| .ATPZ | Automise Compressed Project File (VSoft Technologies Pty Ltd.) |
| .ATR | Atari Disk Image File (Atari) |
| .ATR | Lightscape Material Library |
| .ATR | MicroSim PCBoard Attributes Report |
| .ATRAM | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ATROM | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ATS | Unrelated Inventions Audiotools Plug-in |
| .ATS | Attityd Swedish Survey Program |
| .ATT | Web Form Data (POSTDATA.ATT) |
| .ATT | SeeYou Waypoint (Naviter) |
| .ATT | ZipLip Secure E-mail |
| .ATT | Alphacam Lathe Tool (Planit) |
| .ATT | AT&T Group 4 Bitmap (Fax) |
| .ATTR | iPhoto Image Attributes (Apple Inc.) |
| .ATW | AnyTime Deluxe PIM File |
| .ATW | Attityd Swedish Survey Program |
| .ATX | Alphasoft Trueterm 2001 Dictionaries |
| .ATX | A ZIP-formatted Compressed Archive |
| .ATY | Topicscape Association Type Exported (3D-Scape Limited) |
| .ATZ | Aston Compiled Theme (Gladiators Software) |
| .AT_ | Audio Utility Winatb Compressed File |
| .AU | uLaw/AU Audio File |
| .AU | Audacity Audio Block |
| .AU3 | AutoIt Ver. 3 Script (HiddenSoft) |
| .AU? | LoseThos AutoFile (Terry A. Davis) |
| .AUC | Advanced URL Catalog Database (Jordysoft.com) |
| .AUCTIONS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AUD | Winamp Media File (Nullsoft) |
| .AUD | DTS Audio Data Stream (Digital Theater Systems Inc.) |
| .AUD | Audio File Used by Westwood Studios for Various Games |
| .AUDIO | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AUF | Alphacam User Font (Planit) |
| .AUF | Audacity Block File |
| .AUF | ASAUpdaterV2 Update File (ASA Datec Datensystem GmbH) |
| .AUF | Hansen Information Technologies Login Information (Hansen Information Technologies) |
| .AUP | Windows Update File |
| .AUP | ABCgames Cheater Update Library (ABCgames.cz) |
| .AUP | Audacity Project File |
| .AUP | ePocrates File |
| .AUPD | Windows Update File |
| .AUR | AutoREALM Map |
| .AUR | Sheffield Thesaurus file |
| .AUS | Agnitum Outpost Firewall Configuration |
| .AUS | AutoREALM Symbols |
| .AUT | Signwave Auto-Illustrator File |
| .AUT | Interactive Pictures iPIX Format |
| .AUT | AUTHOR eLearning Module (Microcraft) |
| .AUT | PocketWear Car Lease Kit Vehicle Data File |
| .AUT | GPSMan-autoMapic File |
| .AUT | Xitami Webserver Admin Password File |
| .AUT | TLG Workplace CD Search File |
| .AUT | Descent Manager Mission File |
| .AUT | Autostart Adware Malware |
| .AUT | AutoIt (pre Ver. 3) Script (HiddenSoft) |
| .AUT | Authentication File |
| .AUTOCONF | UNIX File |
| .AUTOCOPY | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AUTOLAUNCH | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AUTOREG | Mozilla (Netscape) Auto Registration Clue (Mozilla.org) |
| .AUX | Geospatial Imaging ERDAS IMAGINE and LPS Data File (Leica Geosystems LLC) |
| .AUX | TeX/LaTeX Auxilliary Reference File |
| .AUX | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AUX | MegaHAL (Ai Research) |
| .AUX | ChiWriter Auxilliary Dictionary File |
| .AV | Final Draft AV Document File (Final Draft, Inc.) |
| .AVA | Photoshop Variations File (Adobe Systems Incorporated) |
| .AVA | Avagio Publication |
| .AVB | Accpac Macro Archive (Sage Software) |
| .AVB | Inoculan Anti-Virus Virus Infected File |
| .AVB | Chat Character File (Microsoft Corporation) |
| .AVB | Avid Bin File (Avid Technology, Inc.) |
| .AVC | Kaspersky Anti-virus Toolkit Database (Kaspersky Lab) |
| .AVD | DOS7 File |
| .AVD | Label Pro Data (Avery) |
| .AVE | ArcView Avenue Script (ESRI) |
| .AVF | AccountsVision Workbook (AccountsVision Ltd) |
| .AVF | Video Information |
| .AVG | AVG Virus Information Database (AVG Technologies) |
| .AVG | Grlib Urt Get Getami File |
| .AVI | AviSys Bird Watcher Database (Jerry Blinn) |
| .AVI | Audio Video Interleave File |
| .AVL | ArcView Theme Legend File (ESRI) |
| .AVL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AVL | Video Fun File |
| .AVM | AVG Incremental Persistent File (AVG Technologies) |
| .AVM | AVISO Geographic Information System Map File (Wojciech Pomianowski) |
| .AVN | altaVENTE Application User Notes (altaVENTE) |
| .AVP | AntiVir Scanner Parameters (Avira GmbH) |
| .AVP | Avid Project |
| .AVP | ArcView Pallet File (ESRI) |
| .AVR | Audio Visual Research Sound |
| .AVR | Video File |
| .AVS | Animation |
| .AVS | Winamp Advanced Visualization Studio (Nullsoft) |
| .AVS | Stardent AVS X Image |
| .AVS | Avisynth |
| .AVS | Avid Settings |
| .AVS | Application Visualization System Format |
| .AVT | A3E Avatar-coding File |
| .AVX | ArcView Extension File (ESRI) |
| .AVX | Avid Extensions |
| .AW | Free Pascal Archive File for Windows Version (FPC Development Team) |
| .AW | Answer Wizard (Microsoft Corporation) |
| .AW | HP AdvanceWrite Text File |
| .AW | Applix Word |
| .AW | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AW2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AW3 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AWA | ActiveWords Application (ActiveWord Systems, Inc.) |
| .AWA | Animation Works Accelerated Movie |
| .AWARE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AWB | Adaptive Multi-Rate Wideband ACELP CODEC |
| .AWB | ActiveWords WordBase (ActiveWord Systems, Inc.) |
| .AWB | Ad-Aware Backup File (Lavasoft) |
| .AWBS | Automated Weight and Balance System (AWBS) Data Storage File (Lockheed Martin Corporation) |
| .AWD | Award BIOS |
| .AWD | FaxView Document (Microsoft Corporation) |
| .AWD | AWK Source Code |
| .AWD | Artweaver Painting (Boris Eyrich) |
| .AWE | Acrobat Bookmark XML File (Adobe Systems Incorporated) |
| .AWF | Qui veut gagner des millions Archive |
| .AWF | Who Wants to be a Millionaire Archive |
| .AWGS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AWGS1 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AWGS2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AWH | ActiveWorlds Browser Help File (Activeworlds, Inc.) |
| .AWK | AWK Script |
| .AWK | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AWL | Ad-Aware Language File (Lavasoft) |
| .AWL | AWL Programming Language |
| .AWLIVE | Active WebCam Live Capture (PY Software) |
| .AWM | RenderWare Language Pack (Criterion Software) |
| .AWM | AllWebMenus |
| .AWM | Animation Works Movie |
| .AWP | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AWP | MS Fax Key Viewer |
| .AWP | ActiveWords Productivity Log (ActiveWord Systems, Inc.) |
| .AWP | Akimbot Waypoint File |
| .AWP | Ability Office Write Document Template (Ability Software) |
| .AWPSTRINGS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AWR | Ad-Aware Reference File (Lavasoft) |
| .AWR | Telsis Digital Audio File |
| .AWS | Ability Office Spreadsheet (Ability Software) |
| .AWS | ActiveWords System File (ActiveWord Systems, Inc.) |
| .AWS | AutoCAD Work Space (Autodesk, Inc.) |
| .AWSHORTCUT | ActiveWords Shortcut (ActiveWord Systems, Inc.) |
| .AWT | AlbumWeb |
| .AWT | AbiWord Document File (The AbiSource Community) |
| .AWW | Ability Office Write Document (Ability Software) |
| .AWW | AWW WML Website Administrator Configuration File |
| .AWX | Custom Application Wizard |
| .AWX | DirectX 8.1 (Microsoft Corporation) |
| .AWX | Fax |
| .AWZIP | ActiveWords Compressed Solution (ActiveWord Systems, Inc.) |
| .AW_ | Quartz Sets Compressed File |
| .AX | ATI DA Interface Handler (ATI Technologies Inc.) |
| .AX | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .AX | Modula-3 Linker Information for Libraries |
| .AX | DirectShow Filter (Microsoft Corporation) |
| .AX | MPEG-4 DVD Filter |
| .AX2 | Apex Ver. 2 Sketch File (Apex Software) |
| .AX3 | Apex Ver. 3 Sketch File (Apex Software) |
| .AXA | Annodex Profile |
| .AXB | Alpha Five Xbasic Script (Alpha Software, Inc.) |
| .AXD | Actrix Technical 2000 (Autodesk, Inc.) |
| .AXD | Label Pro Re-Index (Avery) |
| .AXD | ASP.NET Web Handler File (Microsoft Corporation) |
| .AXE | ChordMaster |
| .AXE | AutoRoute Export File (Microsoft Corporation) |
| .AXE | Paradigm C++ Integrated Debugger File |
| .AXE | Pchord Powpro Compressed File |
| .AXF | Apex Ver. 1 Sketch File (Apex Software) |
| .AXF | Mira File List (Mirametrics, Inc.) |
| .AXG | AutoRoute Trip File (Microsoft Corporation) |
| .AXI | MetaToolsFile Kai's Power Goo Picture Library |
| .AXI | Axiom Composite File Management System |
| .AXL | ArcIMS XML Project |
| .AXL | ASCET Archived XML (ETAS GmbH) |
| .AXLS | Authentica Secure Office Protected Excel Document (Authentica) |
| .AXM | AXMEDIS MPEG-21 File (AxMediaTech S.R.L.) |
| .AXP | CDBurnerXP Audio Compilation (Stefan and Fredrik Haglund, Florian Schmitz) |
| .AXP | AppGini MySQL Code Generator Project (BigProf Software) |
| .AXP | GraphStore eCADLite File |
| .AXP | AnvilCad CAD File (Manufacturing and Consulting Services (MCS), Inc.) |
| .AXQ | Ada ADA Editor File |
| .AXR | ElcomSoft Advanced Archive Password Recovery |
| .AXR | AXIS Diplomat Report File (Systems AXIS Ltd.) |
| .AXR | Telsis Digital Audio File |
| .AXS | HTML; ActiveX Script |
| .AXS | MindAvenue AXEL Stream File |
| .AXT | ZENworks Desktop Management snAPPshot ASCII Application Object Template (Novell, Inc.) |
| .AXT | Photoshop Replace Color/Color Range (Adobe Systems Incorporated) |
| .AXV | Annodex Video Profile |
| .AXX | AxCrypt Encrypted File (Axon Data) |
| .AY | Dispatch Finnair Timetable File (Scott Andrew Borton) |
| .AY | AY Chip Sound (Project AY) |
| .AYA | RPG-Maker2000 Project Launcher Saved Game File |
| .AYM | Z80 Music Code With AY Music |
| .AYS | AY-Paste Paste File |
| .AYU | AY-Paste Uninstall Information |
| .AZ | WinDVD File |
| .AZA | QazaR Compressed Archive |
| .AZD | Amazone Downloader Download Seed File (Amazon.com, Inc.) |
| .AZF | AirZip FileSECURE Secure Format File (AirZip, Inc.) |
| .AZM | CP/M Disk Fix File |
| .AZS | AirZip FileSECURE Secure Format File (AirZip, Inc.) |
| .AZW | Kindle eBook Format (Amazon.com, Inc.) |
| .AZW1 | Kindle eBook Format (Amazon.com, Inc.) |
| .AZX | ZX Audio Sound File |
| .AZZ | AZZ Cardfile Information Card (Antanas Zdramys) |
| .A_T | Atrain |