| ABAS | Aircraft Based Augmentation System |
| ACARS | Aircraft Communications Addressing and Reporting System |
| ACAS | Airborne Collision Avoidance System |
| ADS | Automatic Dependent Surveillance |
| ADS-B | Automatic Dependent Surveillance - Broadcast |
| AEA | Association of European Airlines |
| AECMA | European Association of Aerospace Industries |
| A-ELT | Automatic - Emergency Locator Transmitter |
| AGL | Above Ground Level |
| AMSS | Aeronautical Mobile Satellite Service |
| ANS | Air Navigation Services |
| AOS | Aircraft Operational Control |
| AOR-E/W | Atlantic Ocean Region East/West |
| APATSI | Airport / Air Traffic Services Interface |
| APC | Aeronautical Passenger Communications |
| ARINC | Aeronautical Radio, Inc. |
| ASAS | Airborne Separation Assurance System |
| ASM | Air Space Management |
| A-SMGCS | Advanced Surface Movement Guidance and Control System |
| ATC | Air Traffic Control |
| ATFM | Air Traffic Flow Management |
| ATIS | Automatic Terminal Information Service |
| ATM | Air Traffic Management |
| ATN | Aeronautical Telecommunication Network |
| ATS | Air Traffic Services |
| B-RNAV | Basic Area Navigation |
| C/A | Coarse/Acquisition |
| CDTI | Cockpit Display of Traffic Information |
| CDU | Control Display Unit |
| CEAC | Committee for European Airspace Co-ordination |
| CFIT | Controlled Flight Into Terrain |
| CFMU | Central Flow Management Unit |
| CIP | Convergence and Implementation Programme |
| CNS | Communication Navigation Surveillance |
| COSPAS | Cosmicheskaya Sistyema Poiska Avariynich Sudov |
| CPDLC | Controller-Pilot Data Link Communications |
| CRCO | Central Route Charges Office |
| CW | Continuous Wave |
| DA | Danger Area |
| DAP | Downlink Aircraft Parameter |
| DFIS | Digital Flight Information Services |
| DGNSS | Differential Global Satellite Navigation System |
| DME | Distance Measuring Equipment |
| DOT | Department of Transportation |
| EADI | Electronic Attitude Director Indicator |
| EANPG | European Air Navigation Planning Group |
| EATCHIP | European ATC Harmonisation and Integration Programme |
| EATMS | European Air Traffic Management System |
| ECAC | European Civil Aviation Conference |
| EFIS | Electronic Flight Instrument System |
| EGNOS | European Geostationary Navigation Overlay Service |
| EGPWS | Enhanced Ground Proximity Warning System |
| EHSI | Electronic Horizontal Situation Indicator |
| ELINT | Electronic Intelligence |
| ELT | Emergency Locator Transmitter |
| EM | ElectroMagnetic |
| ESA | European Space Agency |
| ESM | Electronic Support Measures |
| EU | European Union |
| EUROCONTROL | European Organization for the Safety of Air Navigation |
| EW | Electronic Warfare |
| FAA | Federal Aviation Administration |
| FANS | Special Committee on Future Air Navigation System |
| FDPS | Flight Data Processing System |
| FEATS | Future European Air Traffic Services |
| FFAS | Free Flight Airspace |
| FIR | Flight Information Region |
| FL | Flight Level |
| FM | Frequency Modulation |
| FMC | Flight Management Computer |
| FMS | Flight Management System |
| FPGA | Field Programmable Gate Array |
| FREER | Free Route Experimental Encounter Resolution |
| GA | General Aviation |
| GAT | General Air Traffic |
| GBAS | Ground Based Augmentation System |
| GEO | Geostationary Earth Orbit |
| GLONASS | Globalnaja navigacionnaja sputnikovaja sistema |
| GMT | Greenwich Mean Time |
| GMU | GPS Monitoring Unit |
| GNSS | Global Satellite Navigation System |
| GPS | Global Positioning System |
| GPU | Ground Power Unit |
| GPWS | Ground Proximity Warning System |
| HAI | Helicopter Association International |
| HF | High Frequency |
| HME | High Measuring Element |
| HMU | High Monitoring Unit |
| IAS | Indicated Airspeed |
| ICAO | International Civil Aviation Organization |
| IF | Intermediate Frequency |
| IFF | Interrogation Friend or Foe |
| IFPS | Initial Flight plan Processing System |
| IFR | Instrument Flight Rules |
| ILS | Instrument Landing System |
| INMARSAT | International Maritime Satellite Organization |
| IOR | Indian Ocean Region |
| IRS | Inertial Reference System |
| JAA | Joint Aviation Authorities |
| JAR | Joint Aviation Requirements |
| KV | Krátké vlny |
| LAAS | Local Area Augmentation System |
| LADGPS | Local Augmented Differential GPS |
| LEO | Low Earth Orbit |
| LORAN | Long Range Air Navigation System |
| LRNS | Long Range Navigation Specification |
| MAS | Managed Airspace |
| MASPS | Minimum Altimetry System Performance Specification |
| MATSE | Meeting on the Air Traffic System in Europe |
| MEO | Medium Earth Orbit |
| METAR | Meteorological Report |
| MLS | Microwave Landing System |
| MMI | Man-Machine Interface |
| MMR | Multi-Mode Receiver |
| MSAS | MTSAT Satellite Augmentation System |
| MTBF | Mean Time Between Failure |
| NATO | North Atlantic Treaty Organization |
| NAVSTAR | Navigation System using Time And Range |
| NDB | Non-Directional Radio Beacon |
| NM | Nautical Mile |
| NOTAM | Notice to Airmen |
| OAT | Operational Air Traffic |
| PAR | Precision Approach Radar |
| PPS | Precision Positioning Service |
| P-RNAV | Precision Area Navigation |
| PSS | Passive Surveillance System |
| RA | Resolution Advisory |
| RA | Restricted Area |
| RAIM | Receiver Autonomous Integrity Monitoring |
| RNAV | Area Navigation |
| RNP | Required Navigation Performance |
| RTA | Required Time of Arrival |
| RTCA | Radio Technical Commission for Aeronautics |
| RVSM | Reduced Vertical Separation Minima |
| SA | Selective Availability |
| SAR | Search And Rescue |
| SARSAT | Search And Rescue Satellite-Aided Tracking |
| SAS | Scandinavian Airlines |
| SBAS | Satellite Based Augmentation System |
| S-ELT | Survival - Emergency Locator Transmitter |
| SID | Standard Instrument Departure |
| SIF | Selective Identification Facility |
| SLS | Satellite Landing System |
| SMGCS | Surface Movement Guidance and Control System |
| SMR | Surface Movement Radar |
| SPS | Standard Positioning Service |
| SRE | Surveillance Radar Element |
| SSR | Secondary Surveillance Radar |
| STAR | Standard Instrument Arrival |
| TA | Traffic Advisory |
| TACAN | Tactical Air Navigation System |
| TAS | True Airspeed |
| TCAS | Traffic Alert and Collision Avoidance System |
| TDOA | Time Differenec Of Arrival |
| TMA | Terminal Control Area |
| TOA | Time Of Arrival |
| TSA | Temporary Segregated Area |
| TSD | Traffic Situation Display |
| UAR | Upper Air Route |
| UMAS | Unmanaged Airspace |
| UTC | Co-ordinated Universal Time |
| VDL | VHF Data Link |
| VFS | Visual Flight Rules |
| VHF | Very High Frequency |
| VOLMET | Meteorological Information for Aircraft in Flight |
| VOR | VHF Omni-directional Radio Range |
| VORTAC | VOR and TACAN combination |
| WAAS | Wide Area Augmentation System |
| WADGPS | Wide Area Differential GPS |
| WGS-84 | World Geodetic System (1984) |
| WMS | Wide Area Master Station |
| WRS | Wide Area Reference Station |
| WSWS | Wind Shear Warning System |
