| Abbreviation | Definition |
|---|---|
| ARPRO | Aircraft Records Procedures |
| ARS | Addressing and Reporting System |
| ARS | Aircraft Routing Stystem |
| ARS | ARINC 664 Network Remote Switch |
| ARSR | Air Route Surveillance Radar |
| ARTCC | Air Route Traffic Control Centre |
| ARWA | Advanced Rotary Wing Aircraft |
| ASA | Aviation Safety Assistant |
| ASAC | Aviation Security Advisory Committee |
| ASAG | Aviation Safety Advisory Group |
| ASAM | Aviation Safety Action Message |
| ASAP | Aircraft Sales And Parts |
| ASAP | Aviation Safety Action Program |
| ASARS | Airborne Search And Rescue System |
| ASBU | Aviation System Block Upgrades |
| ASCPC | Air Supply and Cabin Pressure Controllers |
| ASDE | Airport Surface Detection Equipment |
| ASDI | Aircraft Situation Display to Industry |
| ASE | Aerospace Systems Engineering |
| ASEC | Aviation Systems Engineering Company |