| ald3 | Adobe PageMaker 3 for Mac Document |
| ald4 | Adobe PageMaker 4 for Mac Document |
| ald6 | Adobe PageMaker 6 for Mac Document |
| aldf | Aldefaer v4 Data |
| alex | Alex Data |
| alf | Act! Database Log |
| alfa | Abbreviated Language For Authorization Data |
| alg | Bentley InRoads Survey Alignment File |
| ali | Adobe RoboHelp Alias Data |
| ali | Application Loader Information |
| ali | Microsoft Dynamics AX Application Label Index |
| alic | Atoll License Data |
| align | CWB Aligner Data |
| all | Cubase VST Arrangement Backup Data |
| all | SVAL All Signal Data |
| alm | Alphacam Laser Param Macro |
| alm | SiRFDemo GPS Almanac File |
| almb | Mac OS X Location Manager Module |
| aln | ClustalW2 Alignment Data |
| aln | LexNavigator Database Update 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 |
