| AAGR | Average Annual Growth Rate |
| ACARS | Aircraft Communications, Addressing and Reporting System |
| ACC | Area Control Centre |
| A-CDM | Airport CDM |
| ACE | ATM cost-effectiveness |
| ACI | Airports Council International |
| ACMG | Airline Cost Management Group |
| ADS-B | Automatic Dependent Surveillance-Broadcast |
| ADS-C | Automatic dependent surveillance-contract |
| AEM | Advanced Emission Model |
| AFIS | Airport/Aerodrome Flight Information Service |
| AIBT | Actual In-Block Time |
| AIRAC | Aeronautical Information Regulation and Control |
| AIRIAL | Air Navigation Inter-Site Acronym List |
| AIS | Aeronautical Information Services |
| Albcontrol | Albanian ANSP |
| ALDT | Actual Landing Time |
| ANS | Air Navigation Services |
| ANS CR | Cech ANSP |
| ANSP | Air Navigation Service Provider |
| AOBT | Actual Off-Block Time |
| AOC | Air Operator Certificate |
| APCH | Approach |
| APM | Aircraft Performance Model |
| APP | Approach Units |
| APV | Approach Procedures with Vertical Guidance |
| ARMATS | Armenian Air Traffic Services (Armenian ANSP) |
| ATC | Air Traffic Control |
| ATCO | Air Traffic Control Officer |
| ATFM | Air Traffic Flow Management |
| ATM | Air Traffic Management |
| ATN | Aeronautical Telecommunications Network |
| ATOT | Actual Take-Off Time |
| Austro Control | Austrian ANSP |
| AVINOR | Norwegian ANSP |
| BADA | Base of Aircraft Data |
| bbl | Barrel |
| BHANSA | Bosnia and Herzegovina Air Navigation Services Agency |
| BULATSA | Bulgarian ANSP |
| CAA | Civil Aviation Authority |
| CBA | Cost-Benefit Analysis |
| CDM | Collaborative Decision-Making |
| CIS | Commonwealth of Independent States |
| CNS | Communication, Navigation and Surveillance |
| CO | Carbon monoxide |
| CO2 | Carbon dioxide |
| CODA | Central Office of Delay Analysis |
| CP1 | Common Project 1 |
| CPDLC | Controller Pilot Data Link Communication |
| CRCO | Central Route Charges Office |
| Croatia Control | Croatian ANSP |
| CRS | Central Reservation System |
| DAIO | Departures, Arrivals, Internal, Overflight |
| db(A) | Equivalent continuous level |
| DCAC Cyprus | Cypriot ANSP |
| D-FIS | Data Link Flight Information Service |
| DFS | Deutsche Flugsicherung (German ANSP) |
| DGAC | Direction Générale de l'Aviation Civile (FR) |
| DHMI | Devlet Hava Meydanları İsletmesi (Turkish ANSP) |
| DME | Distance Measuring Equipment |
| DOT | Department of Transport |
| DSNA | Direction des services de la navigation aérienne (FR) |
| EAD | European AIS Database |
| EANS | Estonian Air Navigation Services (Estonian ANSP) |
| EAO | EUROCONTROL Aviation Outlook |
| EASA | European Aviation Safety Agency |
| ECAC | European Civil Aviation Conference |
| EEA | European Environment Agency |
| EFTA | European Free Trade Association |
| EMEP | European Monitoring and Evaluation Programme |
| ENAIRE | Spanish ANSP |
| ENAV | Ente Nazionale di Assistenza al Volo S.p.A. (Italian ANSP) |
| ESSIP | European Single Sky Implementation |
| ETS | Emissions Trading Scheme (of the European Union) |
| EU | European Union |
| Eurostat | Statistical Office of the European Union |
| EVAIR | EUROCONTROL voluntary ATM incident reporting |
| FANS | Future air navigation systems |
| Fintraffic ANS | Finnish ANSP |
| FIR | Flight Information Region |
| FMC | Flight Management Computer |
| FOCA | Swiss Federal Office of Civil Aviation |
| FPL | Flight Plan |
| FTE | Full Time Equivalent |
| GA | General Aviation |
| GAT | General Air Traffic |
| GBAS | Ground Based Augmentation System |
| GDP | Gross Domestic Product |
| GDS | Global Distribution System |
| GLS | GNSS Landing System |
| GNSS | Global Navigation Satellite System |
| H2O | Water (chemical compound) |
| HASP | Hellenic Aviation Service Provider (Greek ANSP) |
| HC | Unburnt hydrocarbons |
| HEATCO | Developing Harmonised European Approaches for Transport Costing and Project Assessment |
| HF | High Frequency |
| HF RTF | High Frequency Radiotelephony |
| HFDL | High Frequency Data Link |
| HICP | Harmonised Index of Consumer Prices |
| HungaroControl | Hungarian ANSP |
| IAA | Irish Aviation Authority (Irish ANSP) |
| IATA | International Air Transport Association |
| IC | Interrogator Code |
| ICAO | International Civil Aviation Organization |
| IFR | Instrument Flight Rules |
| ILS | Instrument Landing System |
| INMARSAT | International Maritime Satellite |
| IPCC | Intergovernmental Panel on Climate Change |
| IRR | Internal Rate of Return |
| ITF | International Transport Forum |
| kg | Kilogramme |
| LBS | Pound (weight) |
| Lden | Perceived noise level weighted over day/evening/night |
| LFV | Luftfartsverket (Swedish ANSP) |
| LGS | Latvijas Gaisa Satiksme (Latvian ANSP) |
| LNAV | Lateral Navigation |
| LPS | Letové Prevádzkové Služby Slovenskej Republiky (Slovak ANSP) |
| LPV | Localizer Performance with Vertical Guidance |
| LSA | Light Sport Aeroplanes |
| LSSIP | Local Single Sky ImPlementation |
| LTO | Landing and Take-Off Cycle |
| LVNL | Luchtverkeersleiding Nederland (Dutch ANSP) |
| MAIS | Maximum Abbreviated Injury Scale |
| MATS | Malta Air Traffic Services Ltd. (Malta ANSP) |
| MLAT | Multilateration |
| MLS | Microwave Landing System |
| M-NAV | Air Navigation Services Provider of the Republic of North Macedonia |
| MOLDATSA | Moldavian Air Traffic Services Authority |
| MPL3 | Master Plan Level 3 |
| MTSAT | Multifunction Transport Satellite |
| MUAC | Maastricht Upper Air Control Centre |
| N2O | Nitrogen dioxide (chemical compound) |
| NATS | National Air Traffic Services Ltd. (United Kingdom ANSP) |
| NAV Portugal | Portuguese ANSP |
| NAVIAIR | Air Navigation Services – Flyvesikringstjenesten (Danish ANSP) |
| NCC | Non-commercial operations with complex motor-powered aircraft |
| NM | Nautical Miles |
| NM | Network Manager |
| NMD | Network Management Directorate |
| NMVOC | Non-methane volatile organic compound (chemical compound) |
| NOP | Network Operations Plan |
| NOx | Nitrogen Oxides |
| NPV | Net Present Value |
| OAT | Operational Air Traffic |
| Oro Navigacija | Lithuanian ANSP |
| PANSA | Polish Air Navigation Services Agency |
| PAX | Passengers |
| PBN | Performance-Based Navigation |
| PCP | Pilot Common Project |
| PDC ACARS | Pre-Departure Clearance ACARS |
| PM volatile | Particulate Matter volatile |
| PM2.5 | (Atmospheric) Particulate matter |
| Ppm | Parts per million |
| PRB | Performance Review Body |
| PRISME | A EUROCONTROL database |
| PRR | Performance Review Report |
| PRU | Performance Review Unit |
| PSR | Primary Surveillance Radar |
| RNAV | Area Navigation |
| RNP | Required Navigation Performance |
| ROIC | Return On Invested Capital |
| ROMATSA | Romanian Air Traffic Services Administration |
| RPAS | Remotely Piloted Aircraft System |
| RPK | Revenue passenger kilometre |
| SAF | Sustainable Aviation Fuel |
| SAKAERONAVIGATSIA | Georgian ANSP |
| SATCOM | Satellite communications |
| SBAS | Space Based Augmentation System |
| SDP | SESAR Deployment Programme |
| SES | Single European Sky |
| SESAR | Single European Sky ATM Research |
| SID | STATFOR Interactive Dashboard |
| SJU | SESAR Joint Undertaking |
| skeyes | Belgian ANSP |
| Skyguide | Swiss ANSP |
| Slovenia Control | Slovenian ANSP |
| SMATSA | Serbia and Montenegro Air Traffic Services Agency |
| SMS | Safety Management System |
| SO2 | Sulphur dioxide (chemical compound) |
| SOx | Sulphur Oxides |
| SPO | Special Operations |
| SSR | Secondary Surveillance Radar |
| STATFOR | EUROCONTROL Statistics and Forecasts service |
| STD | Scheduled Time of Departure |
| TACAN | Tactical air navigation |
| TMA | Terminal Manoeuvring Area |
| TNSU | Terminal Navigation Service Units |
| TSU | Terminal Service Units |
| TVM | Time Value of Money |
| TWR | Tower |
| UAS | Unmanned Aircraft Systems |
| UHF | Ultra-high frequency |
| UkSATSE | Ukrainian State Air Traffic Service Enterprise |
| UoW | University of Westminster |
| US gal | US gallon |
| VDL | VHF digital datalink |
| VFR | Visual Flight Rules |
| VLA | Very Light Aeroplanes |
| VNAV | Vertical Navigation |
| VOR | VHF Omnidirectional Ranging |
| VOR/DME | VHF Omnidirectional Ranging/Distance Measuring Equipment |
| VORTAC | Combined VOR and TACAN |
| VSL | Value of Statistical Life |
| WACC | Weighted Average Cost of Capital |
| WAM | Wide-Area Multilateration |
| WPR | Waypoint Position Report |