| 1. | .a | Fichero de código fuente del lenguaje Ada. ◊ Alpha channel image data (Spaceward Graphics) ◊ Código fuente de lenguaje ensamblador (Macintosh) ◊ Libreria de Objetos (unix) |
| 2. | .a01 | Compressed and splitted ARJ file archive (part 1) |
| 3. | .a02 | Compressed and splitted ARJ file archive (part 2) |
| 4. | .a03 | Compressed and splitted ARJ file archive (part 3) |
| 5. | .a11 | Graphics (AIIM) |
| 6. | .a31 | Fax archive (T31) |
| 7. | .a3l | Authorware 3.x library |
| 8. | .a3m | Unpackaged file (Authorware for Macintosh) |
| 9. | .a3w | Unpackaged file (Authorware for Windows) |
| 10. | .a4l | Authorware 4.x library |