| ali | Microsoft Dynamics AX Application Label Index |
| alic | Atoll License Data |
| align | CWB Aligner Data |
| all | SVAL All Signal Data |
| all | Cubase VST Arrangement Backup Data |
| alm | SiRFDemo GPS Almanac File |
| alm | Alphacam Laser Param Macro |
| almb | Mac OS X Location Manager Module |
| aln | LexNavigator Database Update Data |
| aln | ClustalW2 Alignment Data |
| alp | Alphacam Laser Post Data |
| alph | Alpheus Data |
| alpha | Gimp RAW Alpha Data |
| alr | ADRIFT Language Resource |
| als | PSpice Alias Data |
| alt3 | Adobe PageMaker for Mac Template |
| alt4 | Adobe PageMaker for Mac Template |
| alt5 | Adobe PageMaker for Mac Template |
| alt6 | Adobe PageMaker 6 for Mac Template |
| alth | QuickHelp for Mac Data |
| altp | QuickHelp for Windows Data |
| altv | QuickView Help Data |
| alv | Adobe Photoshop Levels Settings |
| alx | Application Loader XML |
| aly | Act! Company Layout |
| amaya | Amaya Data |
| amb | AIMMS Model Base |
| amb | Alphacam 2D/3D Mill VB Macro |
| amc | Race Studio 2 All Math Channels Data |
| amdt | AutoCAD Mechanical Desktop Data |