| # | |
| 3D PAM | 3D Path Arrival Management |
| 4D | Four Dimensional |
| A | |
| ACARS | Aircraft Communications Addressing and Reporting System |
| ACTD | Advanced Concept Technology Development |
| ADS-B | Automatic Dependent Surveillance-Broadcast |
| ADS-C | Automatic Dependent Surveillance-Contract |
| ADS-R | Automatic Dependent Surveillance-Re-broadcast |
| AGL | Above Ground Level |
| AI | Aeronautical Information |
| AIM | Aeronautical Information Management |
| AIRE | Atlantic Interoperability Initiative to Reduce Emissions |
| AMASS | Airport Movement Area Safety System |
| ANSP | Air Navigation Service Provider |
| AOC | Airline Operations Center |
| API | Application Programming Interface |
| ARTCC | Air Route Traffic Control Center |
| ASDE-X | Airport Surface Detection Equipment Model X |
| ASIAS | Aviation Safety and Information Analysis and Sharing |
| ASPIRE | Asia and South Pacific Initiative to Reduce Emissions |
| ATC | Air Traffic Control |
| ATCT | Airport Traffic Control Towers |
| ATIS | Automated Terminal Information System |
| ATL | Atlanta International Airport |
| ATM | Air Traffic Management |
| ATOP | Advanced Technology and Oceanic Procedures |
| ATOS | Air Transportation Oversight System |
| ATSAP | Air Traffic Safety Action Program |
| C | |
| C&A | Certification and Authorization |
| CAASD | Center for Advanced Aviation System Development |
| CAST | Certification Authorities Software Team |
| CATIII | Category Three Landing |
| CATM | Collaborative Air Traffic Management |
| CAVS | CDTI Assisted Visual Separation |
| CDA | Continuous Descent Arrival |
| CDM | Collaborative Decision-making |
| CDTI | Cockpit Display of Traffic Information |
| CLEEN | Continuous Low Energy, Emissions and Noise |
| CMU | Communication Management Units |
| CNS | Communication, Navigation and Surveillance |
| COI | Communities of Interest |
| CPDLC | Controller Pilot Data Link Communications |
| CSMC | Cyber Security Management Center |
| CSPR | Closely Spaced Parallel Runways |
| D | |
| DA | Decision Altitude |
| DHS | Department of Homeland Security |
| DME | Distance Measuring Equipment |
| DoD | Department of Defense |
| DOJ | Department of Justice |
| E | |
| EFVS | Enhanced Flight Vision Systems |
| EMF | Event Management Framework |
| EMS | Environmental Management System |
| ERAM | En Route Automation Modernization |
| ETA | Estimated Time of Arrival |
| F | |
| FAA | Federal Aviation Administration |
| FANS | Future Air Navigation System |
| FAROS | Final Approach Runway Occupancy Signal |
| FBI | Federal Bureau of Investigation |
| FIS-B | Flight Information Services-Broadcast |
| FMS | Flight Management System |
| FOC | Flight Operations Centers |
| G | |
| GBAS | Ground Based Augmentation System |
| GLS | GPS Landing System |
| GNSS | Global Navigation Satellite System |
| GPS | Global Positioning System |
| GPWS | Ground Proximity Warning Systems |
| H | |
| HF | Human Factors |
| HUD | Head-up Display |
| I | |
| IARD | Investment Analysis Requirements Document |
| ICAO | International Civil Aviation Organization |
| IFR | Instrument Flight Rules |
| ILS | Instrument Landing System |
| IMC | Instrument Meteorological Conditions |
| IMEX | Information Management and Exchange |
| INFOSEC | Information System Security |
| IRU | Inertial Reference Units |
| ISS | Information Systems Security |
| ITP | In-trail Procedure |
| ITWS | Integrated Terminal Weather System |
| J | |
| JPDO | Joint Planning and Development Office |
| K | |
| kHz | Kilohertz |
| L | |
| LAACS | Logical Access and Authentication Control Service |
| LAAS | Local Area Augmentation System |
| LCGS | Low Cost Ground Surveillance |
| LNAV | Lateral Navigation |
| LPV | Localizer-performance with Vertical Guidance |
| M | |
| MASPS | Minimum Aviation System Performance Standards |
| MDA | Minimum Descent Altitude |
| MFD | Multi-Function Display |
| MHz | Megahertz |
| MIA | Miami International AIrport |
| MIT | Miles-in-Trail |
| MPAR | Multifunction Phased Array Radar |
| N | |
| NAS | National Airspace System |
| NASEA | NAS Enterprise Architecture |
| NAVAID | Navigational Aid |
| NDOT | NextGen Decision Oriented Tools |
| NEI | Network Enabled Infrastructure |
| NEO | Net Enabled Operation |
| NextGen | Next Generation Air Transportation System |
| NNEW | NextGen Network Enabled Weather |
| NOAA | National Oceanic and Atmospheric Administration |
| NOTAM | Notice to Airmen |
| NVS | National Airspace System Voice Switch |
| NWxP WP1 | NextGen Weather Processor Work Package 1 |
| O | |
| OAG | Official Airline Guide |
| OEP | Operational Evolution Plan |
| OPD | Optimized Profile Descent |
| OTM4D Pre-Departure | Oceanic Trajectory Management 4-Dimensional Pre-Departure |
| P | |
| PARTNER | Partnership for Air Transportation Noise and Emissions Reduction |
| PARC | Performance-Based Operations Advisory Rulemaking Committee |
| PATA | Personal Air Transportation Alliance |
| R | |
| RCP | Required Communications Performance |
| RIL | Runway Intersection Lights |
| RIRP | Runway Incursion Reduction Program |
| RLVs | Reusable Launch Vehicles |
| RNAV | Area Navigation |
| RNP | Required Navigational Performance |
| ROA | Remotely Operated Aircraft |
| RPAT | Parallel Approach Transition |
| RPR | Rulemaking Project Record |
| RSP | Required Surveillance Performance |
| RTA | Required Time of Arrival |
| RTCA | Radio Technical Commission for Aeronautics |
| RWSL | Runway Status Lights |
| S | |
| SAAAR | Special Aircrew and Aircraft Authorization Required |
| SAMS | Special Use Airspace Management System |
| SBAS | Satellite-based Augmentation System |
| SBS | Surveillance Broadcast Services |
| SE | Safety Enhancement |
| SIGMET | Significant Meteorological Information |
| SIM | Security Information Management |
| SITS | Security Integrated Tool Set |
| SME | Subject Matter Expert |
| SMS | Safety Management System |
| SOIA | Simultaneous Offset Instrument Approach |
| SSA | Shared Situation Awareness |
| STA | Scheduled Time of Arrival |
| STAR | Standard Terminal Arrival Route |
| SUA | Special Use Airspace |
| SVS | Synthetic Vision Systems |
| SWIM | System-Wide Information Management |
| T | |
| TA | Tailored Arrival |
| TAWS | Terrain Awareness Warning Systems |
| TBO | Trajectory Based Operation |
| TCAS | Traffic Alert and Collision Avoidance System |
| TDLS | Tower Data Link System |
| TDZE | Touchdown Zone Elevation |
| TFM | Traffic Flow Management |
| TFM-M | Traffic Flow Management-Modernization |
| TFMS | Traffic Flow Management System |
| TIS-B | Traffic Information Service-Broadcast |
| TMA | Traffic Management Advisor |
| TMIs | Traffic Management Initiatives |
| TOAC | Time of Arrival Control |
| TSA | Transportation Security Administration |
| TSAFE | Tactical Separation Assisted Flight Environment |
| TSO | Technical Standard Orders |
| U | |
| UAS | Unmanned Aircraft Systems |
| UAT | Universal Access Transceiver |
| URET | User Request Evaluation Tool |
| V | |
| VDL | Very High Frequency Digital Link |
| VFR | Visual Flight Rules |
| VHF | Very High Frequency |
| VLJ | Very Light Jet |
| VMC | Visual Meteorological Conditions |
| VNAV | Vertical Navigation |
| W | |
| WAAS | Wide Area Augmentation System |
| WARP | Weather and Radar Processor |
| WATRS | Western Atlantic Track System |
| WT | Wake Turbulence |
| WTMA | Wake Turbulence Management for Arrivals |
| WTMD | Wake Turbulence Mitigation for Departures |