| adls | ADL Source File |
| adpp | Adobe Device Central Profile Package |
| ads | Ada Specification File |
| adt | Eclipse IDE Cobol Project |
| IBM AIX Application Development Toolkit Data |
| advixeexp | Intel Advisor Results Data |
| advs | Adobe Device Central Device Set |
| aef | CA Visual Objects Application Export Data |
| ael | Asterisk Extension Language Source Code |
| aet | FileMaker Pro Runtime Database |
| aex | Alpha Five Compiled Library Script |
| afl | Psion OPL Add-file List |
| agc | AfterGRASP Compiled Script |
| agi | Asterisk Gateway Interface |
| agls | Adobe GoLive Snippet |
| ago | Autolog Script |
| agp | ASPMaker Project |
| agq | Altair GraphQL Client Data |
| ags | AfterGRASP Script |
| agwl | Abstract Grid Workflow Language Data |
| ahf | AnadigmDesigner ASCII Code |
| ahr | Omnis Studio Ad hoc Report |
| ahtml | Amulet Module Main OS File |
| ai | OpenEdge ABL After Image |
| aidl | Android Interface Definition Language Data |
| aif | Object COBOL Animator Session Data |
| ain | Valve Source Compiled AI Nodegraph |
| aio | APL Transfer Format File |
| aj | AspectJ Source Code |
| al11 | SAP ABAP AL11 Transaction Code |
| alan | Alan v3 Source Code |
| alb | Alpha Five Library |
| alc | ACUCOBOL-GT License |
| alg | PDP-10 Algol Compiler Source Code |
| all | Java RMI Policy File |
| alm | Alpha Five Data |
| alx | ActiveX Layout Control Data |
| Alpha Five Script Data |
| am | Applix Builder Shelf Macro |
| GNU Automake Input File |
| amd | ASCET XML Model Description |
| amf | Autolog Macro |
| aml | Abstract Markup Language File |
| amn | Aero Studio 2008 Menu Data |
| amos | AMOS Source Code |
| ane | Adobe AIR Native Extension |
| ani | Valve Source Model Animation Data |
| animevents | Amazon Lumberyard Animation Events Database |
| animgraph | Amazon Lumberyard Animation Graph Data |
| animset | FaceFX Animation Set Data |
| animset_ingame | FaceFX In-Game Animation Set Data |
| anl | Project Analyzer Saved Data |
| ansym | Adobe Edge Animate Symbol Data |
| anv | Anastasia Style |
| aop | JBoss AOP File |
| ap | WebSuite Active Page |
| ap3 | VS10XX VSOS Application |
| apc | Gupta Team Developer Compiled Application |
| apd | Eclipse IDE Plugin Descriptor |
| apg | APGen Script |
| api | WebObjects API File |
| apinotes | Swift Objective-C API Note |
| apl | Gupta Team Developer Application Library |
| aplt | AppleScript Applet |
| apm | Adobe Authorware for Mac Packaged Data |
| app | dBase Application Generator Object |
| Gupta Team Developer Application |
| OrbWorks PocketC Application |
| Psion OVAL Application Data |
| Visual FoxPro Application |
| appc | Oracle WebLogic APPC Data |
| applescript | AppleScript Script |
| AppleScript Script Bundle |
| applet | Eclipse IDE Java Applet Policy Data |
| appletviewer | Java appletviewer Data |
| appodeal | Appodeal SDK Data |
| appup | Erlang Application Upgrade File |
| appx | Microsoft Windows 8 App Package |
| appxbundle | Microsoft Windows 8.1 App Bundle Package |
| appxbundlemanifest | Microsoft Windows 8.1 App Bundle Manifest File |
| appxmanifest | Windows 8 App Package Manifest Data |
| appxsym | Windows 8 App Package Symbols |
| appxupload | Visual Studio Windows Application Upload Data |
| aps | Uniface Startup Shell Data |
| VS Binary Resource Script Data |
| apw | Adobe Authorware Packaged Data |
| apx | Borland C++ AppExpert Database |
| WebSuite Compiled Active Page |
| aqf | Aquifer CMS Page |
| ar | Java JRE 1.3 Library |
| Unix Static Library |
| arbfp1 | ARB Fragment Shader Program |
| arbvp1 | ARB Vertex Shader Program |
| arc | BASIS ASCII Resource Data |
| arcv | Crestron SIMPL Archive Manifest Data |
| armi | Carbide ARMI Project |
| armx | ASP.NET Source Code |
| arnoldc | ArnoldC Source Code |
| aro | SteelArrow Web Application |
| arq | Remedy ARS Macro |
