| 1. | .ap | Applix Presents file ◊ Compressed Amiga file archive (Whap) ◊ Datafile (Datalex EntryPoint 90) |
| 2. | .apb | Apollo OLE Section file |
| 3. | .apc | Compiled application file (Centura Team Developer) ◊ Printer driver characters (Lotus 1-2-3) |
| 4. | .apd | Aldus Printer Description (Aldus PageMaker) ◊ Dynamic application library file (Centura Team Developer) ◊ Printer driver (Lotus 1-2-3) |
| 5. | .apf | Allaire Project File (WWW page development) ◊ Printer driver fonts (Lotus 1-2-3) |
| 6. | .api | Adobe Printer Ink file (Adobe PhotoShop) ◊ Application Program Interface file (Adobe Acrobat) ◊ Passed parameter file (1st Reader) ◊ Printer driver (Lotus 1-2-3) |
| 7. | .apk | Sound file (Quake2) |
| 8. | .apl | APL work space ◊ Application library file (Centura Team Developer) ◊ Support module (Manugraphics APL products) |
| 9. | .app | Add-in application file (Symphony) ◊ Application object file (dBASE Application Generator) ◊ Executable application file (DR-DOS - NeXTstep - Atari - EPOC) ◊ Generated application (F… 0.3 KB |
| 10. | .apr | ArcView Project File (ODB format) (ArcView) ◊ ArcView project file ◊ Data (Lotus Approach 97) ◊ Employee performance review (Employee Appraiser) |
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