| Abkürzung | Beschreibung |
| | |
| A-G | Air to Ground |
| A/C | Aircraft |
| A/l | Anti-ice |
| A/P | Autopilot |
| A/T | Autothrottle |
| AA/A-A | Air to Air |
| AAA | Anti Aircraft Artillery |
| AAATS | Australian Advanced Air Traffic Services |
| AAC | Aeronautical Administration Communication |
| AAC | Army Air Corps |
| AAM | Air to Air Missile |
| AAR | Air to Air Refueling |
| AAS | Advanced Automation System |
| AATT | Advanced Aviation Transportation Technology |
| AB | Afterburner |
| AB | Air Base |
| ACA | Agile Combat Aircraft |
| ACARS | Aircraft Communications Addressing and Reporting System |
| ACARS | ARINC communications and address reporting system |
| ACAS | Airborne Collision and Avoidance System |
| ACC | Air Combat Command |
| ACF | Area Control Facility |
| ACFS | Advanced Concepts Flight Simulator |
| ACK | Acknowledge |
| ACMS | Aircraft Condition Monitoring System |
| ACT | Active |
| AD | Air Defence |
| AD | Airworthiness Directive |
| ADATS | Air Defence Anti Tank System |
| ADC | Air Data Computer |
| ADF | Automatic Direction Finder |
| ADGB | Air Defence of Great Britain |
| ADI | Attitude Director lndicator |
| ADLP | Aircraft Data Link Processor |
| ADMA | Aviation Distributors and Manufactureres Association |
| ADO | Approved Design Organisation |
| ADS | Automatic Dependent Surveillance |
| AECB | Atomic Energy Control Board |
| AERA | Automated Enroute ATC |
| AEW | Airborne Early Warning |
| AFB | Air Force Base |
| AFCENT | Air Forces Central (Europe) |
| AFCS | Automatic Flight Control System |
| AFDS | Autopilot Flight Director System |
| AFNORTH | Air Forces North (Europe) |
| AFS | Automatic Flight System |
| AFSOUTH | Air Forces South (Europe) |
| AGATE | Advanced General Aviation Transport Experiments |
| AGL | Above Ground Level |
| AGM | Air to Ground Missile |
| AGNA | Advisory Group of National Authorities |
| AHRS | Attitude Heading Reference System |
| AI | Artificial Intelligence |
| AIM | Air Intercept Missile |
| AIRS | Advanced Infrared Sounder |
| AL | Allegheny |
| ALARM | Air Launched Anti-Radiation Missile |
| ALBM | Air Launched Ballistic Missile |
| ALCM | Air Launched Cruise Missile |
| ALPA | Air Line Pilots Association |
| ALT | Alternate |
| ALT | Altitude |
| ALT HOLD | Altitude Hold Mode |
| ALTN | Alternate |
| AM | Amplitude Modulation |
| AMC | Acceptable Means of Compliance |
| AMO | Approved Maintenance Organisation |
| AMOSS | Airline Maintenance and Operation Support System |
| AMRAAM | Advanced Medium Range Air to Air Missile |
| AMSS | Aeronautical Mobile Satellite Service |
| ANG | Air National Guard |
| AOA | Airport Operations Area |
| AOA | Angle-of-Attack |
| AOC | Aeronautical Operation Control |
| AOC | Air Operator Certificate |
| AOCS | Attitude and Orbit Control System |
| AOG | Aircraft On Ground |
| AOM | Aircraft Operating Manual |
| AOPA | Aircraft Owners and Pilots Association |
| AP | Armor Piercing |
| APA | Allied Pilots Association |
| APC | Aeronautical Passenger Communication |
| APMS | Automated Performance Measurement System |
| APO | Approved Production Organisation |
| APPR | Approach/Approach Mode |
| APRT | Airport |
| APU | Auxiliary Power Unit |
| AQP | Advanced Qualification Program |
| ARAC | Aviation Rulemaking Advisory Committee |
| ARC | Airworthiness Review Certificate |
| ARINC | Aeronautical Radio Incorporated |
| ARM | Anti Radiation Missile |
| ARPA | Advanced Research Projects Agency |
| ARR | Arrival |
| ARTCC | Air Route Traffic Control Center |
| ARTS | Automated Radar Terminal System |
| ASCII | American Standard Code for Interface and Interchange |
| ASI | Air Speed Indicator |
| ASM | Air to Surface Missile |
| ASM | Anti Submarine Missile |
| ASR | Airport Surveillance Radar |
| ASRAAM | Advanced Short Range Air to Air Missile |
| ASRS | Aviation Safety Reporting System |
| ASW | Anti Submarine Warfare |
| ATA | Actual Time of Arrival |
| ATA | Air Transport Association |
| ATC | Air Traffic Control |
| ATCS | Advanced Train Control Systems |
| ATCSCC | Air Traffic Control System Command Center |
| ATHR | Autothrust System |
| ATIS | Automatic Terminal Information Service |
| ATM | Air Transportation Management |
| ATN | Aeronautical Telecommunications Network |
| ATPL | Airline Transport Pilot Licence |
| ATS | Automatic Throttle System |
| ATSC | Air Traffic Service Communications |
| AVAIL | Available |
| AVHRR | Advanced Very High-Resolution Radiometer |
| AWACS | Airborne Warning And Control System |
| AWAS | Automated Weather Advisory Station |
| AWIPS | Advanced Weather Interactive Processing System |
| AWO | All Weather Operations |