Aviation Acronyms
Here's a comprehensive list of aviation acronyms and airport acronyms. We hope this helps you navigate the complex world of aviation jargon! Please let us know if you find any errors or if you'd like to suggest additional acronyms.
A | B | C | D | E | F | G | H | I | J | K | L | M
N | O | P | Q | R | S | T | U | V | W | X | Y | Z
| A | top |
| A/C | Aircraft |
| A/G | Air to Ground |
| A/H | Altitude/Height |
| AAC | Mike Monroney Aeronautical Center |
| AAF | Army Air Field |
| AAI | Arrival Aircraft Interval |
| AAP | Advanced Automation Program |
| AAR | Airport Acceptance Rate |
| ABDIS | Automated Data Interchange System Service B |
| ACAIS | Air Carrier Activity Information System |
| ACAS | Aircraft Collision Avoidance System |
| ACC | Airports Consultants Council |
| ACC | Area Control Center |
| ACCT | Accounting Records |
| ACD | Automatic Call Distributor |
| ACDO | Air Carrier District Office |
| ACF | Area Control Facility |
| ACFO | Aircraft Certification Field Office |
| ACFT | Aircraft |
| ACI-NA | Airports Council International - North America |
| ACID | Aircraft Identification |
| ACIP | Airport Capital Improvement Plan |
| ACLS | Automatic Carrier Landing System |
| ACLT | Actual Landing Time Calculated |
| ACO | Office of Airports Compliance and Field Operations |
| ACO | Aircraft Certification Office |
| ACRP | Airport Cooperative Research Program |
| ADA | Air Defense Area |
| ADAP | Airport Development Aid Program |
| ADAS | AWOS Data Acquisition System |
| ADCCP | Advanced Data Communications Control Procedure |
| ADDA | Administrative Data |
| ADF | Automatic Direction Finding |
| ADI | Automatic De-Ice and Inhibitor |
| ADIN | AUTODIN Service |
| ADIZ | Air Defense Identification Zone |
| ADL | Aeronautical Data-Link |
| ADLY | Arrival Delay |
| ADO | Airline Dispatch Office |
| ADP | Automated Data Processing |
| ADS | Automatic Dependent Surveillance |
| ADSIM | Airfield Delay Simulation Model |
| ADSY | Administrative Equipment Systems |
| ADTN | Administrative Data Transmission Network |
| ADTN2000 | Administrative Data Transmission Network 2000 |
| ADVO | Administrative Voice |
| AEG | Aircraft Evaluation Group |
| AERA | Automated En-Route Air Traffic Control |
| AEX | Automated Execution |
| AF | Airway Facilities |
| AFB | Air Force Base |
| AFIS | Automated Flight Inspection System |
| AFP | Area Flight Plan |
| AFRES | Air Force Reserve Station |
| AFS | Airways Facilities Sector |
| AFSFO | AFS Field Office |
| AFSFU | AFS Field Unit |
| AFSOU | AFS Field Office Unit (Standard is AFSFOU) |
| AFSS | Automated Flight Service Station |
| AFTN | Automated Fixed Telecommunications Network |
| AGL | Above Ground Level |
| AID | Airport Information Desk |
| AIG | Airbus Industries Group |
| AIM | Airman's Information Manual |
| AIP | Airport Improvement Plan |
| AIRMET | Airmen's Meteorological Information |
| AIRNET | Airport Network Simulation Model |
| AIS | Aeronautical Information Service |
| AIT | Automated Information Transfer |
| ALP | Airport Layout Plan |
| ALS | Approach Lighting System |
| ALSF1 | ALS with Sequenced Flashers I |
| ALSF2 | ALS with Sequenced Flashers II |
| ALSIP | Approach Lighting System Improvement Plan |
| ALTRV | Altitude Reservation |
| AMASS | Airport Movement Area Safety System |
| AMCC | ACF/ARTCC Maintenance Control Center |
| AMOS | Automated Meteorological Observation Station |
| AMP | ARINC Message Processor (OR) Airport Master Plan |
| AMVER | Automated Mutual Assistance Vessel Rescue System |
| ANC | Alternate Network Connectivity |
| ANCA | Airport Noise and Capacity Act |
| ANG | Air National Guard |
| ANGB | Air National Guard Base |
| ANMS | Automated Network Monitoring System |
| ANSI | American National Standards Group |
| AOA | Air Operations Area |
| AP | Acquisition Plan |
| APP | Approach |
| APS | Airport Planning Standard |
| AQAFO | Aeronautical Quality Assurance Field Office |
| ARAC | Army Radar Approach Control (AAF) |
| ARAC | Aviation Rulemaking Advisory Committee |
| ARCTR | FAA Aeronautical Center or Academy |
| ARF | Airport Reservation Function |
| ARFF | Aircraft Rescue and Fire Fighting |
| ARINC | Aeronautical Radio Inc. |
| ARLNO | Airline Office |
| ARO | Airport Reservation Office |
| ARP | Airport Reference Point |
| ARSA | Airport Service Radar Area |
| ARSR | Air Route Surveillance Radar |
| ARTCC | Air Route Traffic Control Center |
| ARTS | Automated Radar Terminal System |
| ASAS | Aviation Safety Analysis System |
| ASC | AUTODIN Switching Center |
| ASCP | Aviation System Capacity Plan |
| ASD | Aircraft Situation Display |
| ASDA | Accelerate Stop Distance Available |
| ASLAR | Aircraft Surge Launch And Recovery |
| ASM | Available Seat Mile |
| ASP | Arrival Sequencing Program |
| ASOS | Automatic Surface Observation System |
| ASQP | Airline Service Quality Performance |
| ASR | Airport Surveillance Radar |
| ASTA | Airport Surface Traffic Automation |
| ASV | Airline Schedule Vendor |
| AT | Air Traffic |
| ATA | Air Transport Association of America |
| ATAS | Airspace and Traffic Advisory Service |
| ATCAA | Air Traffic Control Assigned Airspace |
| AT&T | American Telephone and Telegraph |
| AT&T ASDC | AT&T Agency Service Delivery Center |
| AT&T CSA | AT&T Customer Support Associate |
| ATC | Air Traffic Control |
| ATCBI | Air Traffic Control Beacon Indicator |
| ATCCC | Air Traffic Control Command Center |
| ATCO | Air Taxi Commercial Operator |
| ATCRB | Air Traffic Control Radar Beacon |
| ATCRBS | Air Traffic Control Radar Beacon System |
| ATCSCC | Air Traffic Control Systems Command Center |
| ATCT | Airport Traffic Control Tower |
| ATIS | Automated Terminal Information Service |
| ATISR | ATIS Recorder |
| ATM | Air Traffic Management |
| ATM | Asynchronous Transfer Mode |
| ATMS | Advanced Traffic Management System |
| ATN | Aeronautical Telecommunications Network |
| ATODN | AUTODIN Terminal (FUS) |
| ATOVN | AUOTVON (Facility) |
| ATOMS | Air Traffic Operations Management System |
| ATS | Air Traffic Service |
| ATSCCP | ATS Contingency Command Post |
| ATTIS | AT&T Information Systems |
| AUTODIN | DoD Automatic Digital Network |
| AUTOVON | DoD Automatic Voice Network |
| AVON | AUTOVON Service |
| AVN | Aviation Standards National Field Office, Oklahoma City |
| AWIS | Airport Weather Information |
| AWOS | Automated Weather Observation System |
| AWP | Aviation Weather Processor |
| AWPG | Aviation Weather Products Generator |
| AWS | Air Weather Station |
| B | top |
| BANS | BRITE Alphanumeric System |
| BART | Billing Analysis Reporting Tool (GSA software tool) |
| BASIC | Basic Contract Observing Station |
| BASOP | Military Base Operations |
| BCA | Benefit/Cost Analysis |
| BCR | Benefit/Cost Ratio |
| BDAT | Digitized Beacon Data |
| BMP | Best Management Practices |
| BOC | Bell Operating Company |
| bps | bits per second |
| BRI | Basic Rate Interface |
| BRITE | Bright Radar Indicator Terminal Equipment |
| BRL | Building Restriction Line |
| BUEC | Back-up Emergency Communications |
| BUECE | Back-up Emergency Communications Equipment |
| C | top |
| CAA | Civil Aviation Authority |
| CAA | Clean Air Act |
| CAB | Civil Aeronautics Board |
| CARF | Central Altitude Reservation Facility |
| CASFO | Civil Aviation Security Office |
| CAT | Category |
| CAT | Clear Air Turbulence |
| CAU | Crypto Ancillary Unit |
| CBI | Computer Based Instruction |
| CBT | Computer Based Training |
| CCC | Communications Command Center |
| CCCC | Staff Communications |
| CCCH | Central Computer Complex Host |
| CC&O | Customer Cost and Obligation |
| CCSD | Command Communications Service Designator |
| CCS7-NI | Communication Channel Signal-7 Network Interconnect |
| CCU | Central Control Unit |
| CD | Common Digitizer |
| CDR | Cost Detail Report |
| CDT | Controlled Departure Time |
| CDTI | Cockpit Display of Traffic Information |
| CENTX | Central Telephone Exchange |
| CEP | Capacity Enhancement Program |
| CEQ | Council on Environmental Quality |
| CERAP | Central Radar Approach |
| CFC | Central Flow Control |
| CFCF | Central Flow Control Facility |
| CFCS | Central Flow Control Service |
| CFIT | Controlled Flight Into Terrain |
| CFR | Code of Federal Regulations |
| CFWP | Central Flow Weather Processor |
| CFWU | Central Flow Weather Unit |
| CGAS | Coast Guard Air Station |
| CLC | Course Line Computer |
| CLIN | Contract Line Item |
| CLT | Calculated Landing Time |
| CM | Commercial Service Airport |
| CNMPS | Canadian Minimum Navigation Performance Specification Airspace |
| CNS | Consolidated NOTAM System |
| CNSP | Consolidated NOTAM System Processor |
| CO | Central Office |
| COE | U.S. Army Corps of Engineers |
| COMCO | Command Communications Outlet |
| CONUS | Continental United States |
| CORP | Private Corporation other than ARINC or MITRE |
| CPE | Customer Premise Equipment |
| CPMIS | Consolidated Personnel Management Information System |
| CRA | Conflict Resolution Advisory |
| CRDA | Converging Runway Display Aid |
| CRT | Cathode Ray Tube |
| CSA | Communications Service Authorization |
| CSIS | Centralized Storm Information System |
| CSO | Customer Service Office |
| CSR | Communications Service Request |
| CSS | Central Site System |
| C/S/S/N | Capacity/Safety/Security/Noise |
| CTA | Controlled Time of Arrival |
| CTA | Control Area |
| CTA/FIR | Control Area/Flight Information Region |
| CTAF | Common Traffic Advisory Frequency |
| CTAS | Center Tracon Automation System |
| CTMA | Center Traffic Management Advisor |
| CUPS | Consolidated Uniform Payroll System |
| CVFR | Controlled Visual Flight Rules |
| CVTS | Compressed Video Transmission Service |
| CW | Continuous Wave |
| CWSU | Central Weather Service Unit |
| CWY | Clearway |
| D | top |
| DA | Direct Access |
| DA | Decision Altitude/Decision Height |
| DA | Descent Advisor |
| DABBS | DITCO Automated Bulletin Board System |
| DAIR | Direct Altitude and Identity Readout |
| DAR | Designated Agency Representative |
| DARC | Direct Access Radar Channel |
| dBA | Decibels A-weighted |
| DBCRC | Defense Base Closure and Realignment Commission |
| DBE | Disadvantaged Business Enterprise |
| DBMS | Data Base Management System |
| DBRITE | Digital Bright Radar Indicator Tower Equipment |
| DCA | Defense Communications Agency |
| DCAA | Dual Call Automatic Answer Device |
| DCCU | Data Communications Control Unit |
| DCE | Data Communications Equipment |
| DDA | Dedicated Digital Access |
| DDD | Direct Distance Dialing |
| DDM | Difference in Depth of Modulation |
| DDS | Digital Data Service |
| DEA | Drug Enforcement Agency |
| DEDS | Data Entry and Display System |
| DEIS | Draft Environmental Impact Statement |
| DEP | Departure |
| DEWIZ | Distance Early Warning Identification Zone |
| DF | Direction Finder |
| DFAX | Digital Facsimile |
| DFI | Direction Finding Indicator |
| DGPS | Differential Global Positioning Satellite (System) |
| DH | Decision Height |
| DID | Direct Inward Dial |
| DIP | Drop and Insert Point |
| DIRF | Direction Finding |
| DITCO | Defense Information Technology Contracting Office Agency |
| DME | Distance Measuring Equipment |
| DME/P | Precision Distance Measuring Equipment |
| DMN | Data Multiplexing Network |
| DNL | Day-Night Equivalent Sound Level (Also called Ldn) |
| DOD | Direct Outward Dial |
| DoD | Department of Defense |
| DOI | Department of Interior |
| DOS | Department of State |
| DOT | Department of Transportation |
| DOTS | Dynamic Ocean Tracking System |
| DOTCC | Department of Transportation Computer Center |
| DSCS | Digital Satellite Compression Service |
| DSUA | Dynamic Special Use Airspace |
| DTS | Dedicated Transmission Service |
| DUAT | Direct User Access Terminal |
| DVFR | Defense Visual Flight Rules |
| DVFR | Day Visual Flight Rules |
| DVOR | Doppler Very High Frequency Omni-Directional Range |
| DYSIM | Dynamic Simulator |
| E | top |
| E-MSAW | En-Route Automated Minimum Safe Altitude Warning |
| EA | Environmental Assessment |
| EARTS | En Route Automated Radar Tracking System |
| ECOM | En Route Communications |
| ECVFP | Expanded Charted Visual Flight Procedures |
| EDCT | Expedite Departure Path |
| EFAS | En Route Flight Advisory Service |
| EFC | Expect Further Clearance |
| EFIS | Electronic Flight Information Systems |
| EIAF | Expanded Inward Access Features |
| EIS | Environmental Impact Statement |
| ELT | Emergency Locator Transmitter |
| ELWRT | Electrowriter |
| EMAS | Engineered Materials Arresting System |
| EMPS | En Route Maintenance Processor System |
| EMS | Environmental Management System |
| ENAV | En Route Navigational Aids |
| EPA | Environmental Protection Agency |
| EPS | Engineered Performance Standards |
| EOF | Emergency Operating Facility |
| EPSS | Enhanced Packet Switched Service |
| ERAD | En Route Broadband Radar |
| ESEC | En Route Broadband Secondary Radar |
| ESP | En Route Spacing Program |
| ESYS | En Route Equipment Systems |
| ESF | Extended Superframe Format |
| ETA | Estimated Time of Arrival |
| ETE | Estimated Time En Route |
| ETG | Enhanced Target Generator |
| ETMS | Enhanced Traffic Management System |
| ETN | Electronic Telecommunications Network |
| EVAS | Enhanced Vortex Advisory System |
| EVCS | Emergency Voice Communications System |
| F | top |
| F/A | Flight Attendant |
| FAA | Federal Aviation Administration |
| F&E | Facility and Equipment |
| FAAAC | FAA Aeronautical Center |
| FAACIS | FAA Communications Information System |
| FAATC | FAA Technical Center |
| FAC | Facility |
| FAF | Final Approach Fix |
| FAP | Final Approach Point |
| FAPM | FTS2000 Associate Program Manager |
| FAR | Federal Aviation Regulation |
| FAATSAT | FAA Telecommunications Satellite |
| FAST | Final Approach Spacing Tool |
| FAX | Facsimile Equipment |
| FBO | Fixed Base Operator |
| FBS | Fall Back Switch |
| FCC | Federal Communications Commission |
| FCLT | Freeze Calculated Landing Time |
| FCOM | FSS Radio Voice Communications |
| FCPU | Facility Central Processing Unit |
| FDAT | Flight Data Entry and Printout (FDEP) and Flight Data Service |
| FDE | Flight Data Entry |
| FDEP | Flight Data Entry and Printout |
| FDIO | Flight Data Input/Output |
| FDIOC | Flight Data Input/Output Center |
| FDIOR | Flight Data Input/Output Remote |
| FDM | Frequency Division Multiplexing |
| FDP | Flight Data Processing |
| FED | Federal |
| FEIS | Final Environmental Impact Statement |
| FEP | Front End Processor |
| FFAC | From Facility |
| FIFO | Flight Inspection Field Office |
| FIG | Flight Inspection Group |
| FINO | Flight Inspection National Field Office |
| FIPS | Federal Information Publication Standard |
| FIR | Flight Information Region |
| FIRE | Fire Station |
| FIRMR | Federal Information Resource Management Regulation |
| FL | Flight Level |
| FLOWSIM | Traffic Flow Planning Simulation |
| FMA | Final Monitor Aid |
| FMF | Facility Master File |
| FMIS | FTS2000 Management Information System |
| FMS | Flight management System |
| FNMS | FTS2000 Network Management System |
| FOIA | Freedom Of Information Act |
| FONSI | Finding of No Significant Impact |
| FP | Flight Plan |
| FRC | Request Full Route Clearance |
| FSAS | Flight Service Automation System |
| FSDO | Flight Standards District Office |
| FSDPS | Flight Service Data Processing System |
| FSEP | Facility/Service/Equipment Profile |
| FSP | Flight Strip Printer |
| FSPD | Freeze Speed Parameter |
| FSS | Flight Service Station |
| FSSA | Flight Service Station Automated Service |
| FSTS | Federal Secure Telephone Service |
| FSYS | Flight Service Station Equipment Systems |
| FTS | Federal Telecommunications System |
| FTS2000 | Federal Telecommunications System 2000 |
| FUS | Functional Units or Systems |
| FWCS | Flight Watch Control Station |
| G | top |
| GA | General Aviation |
| GAA | General Aviation Activity |
| GAAA | General Aviation Activity and Avionics |
| GADO | General Aviation District Office |
| GCA | Ground Control Approach |
| GNAS | General National Airspace System |
| GNSS | Global Navigation Satellite System |
| GOES | Geostationary Operational Environmental Satellite |
| GOESF | GOES Feed Point |
| GOEST | GOES Terminal Equipment |
| GPRA | Government Performance Results Act |
| GPS | Global Positioning Satellite |
| GPWS | Ground Proximity Warning System |
| GRADE | Graphical Airspace Design Environment |
| GS | Glide Slope Indicator |
| GSA | General Services Administration |
| GSE | Ground Support Equipment |
| H | top |
| H | Non-Directional Radio Homing Beacon (NDB) |
| HAA | Height Above Airport |
| HAL | Height Above Landing |
| HARS | High Altitude Route System |
| HAT | Height Above Touchdown |
| HAZMAT | Hazardous Materials |
| HCAP | High Capacity Carriers |
| HLDC | High Level Data Link Control |
| HDME | NDB with Distance Measuring Equipment |
| HDQ | FAA Headquarters |
| HELI | Heliport |
| HF | High Frequency |
| HH | NDB, 2kw or More |
| HI-EFAS | High Altitude EFAS |
| HOV | High Occupancy Vehicle |
| HSI | Horizontal Situation Indicators |
| HUD | Housing and Urban Development |
| HWAS | Hazardous In-Flight Weather Advisory |
| Hz | HERTZ |
| I | top |
| IA | Indirect Access |
| IAF | Initial Approach Fix |
| I/AFSS | International AFSS |
| IAP | Instrument Approach Procedures |
| IAPA | Instrument Approach Procedures Automation |
| IBM | International Business Machines |
| IBP | International Boundary Point |
| IBR | Intermediate Bit Rate |
| ICAO | International Civil Aviation Organization |
| ICSS | International Communications Switching Systems |
| IDAT | Interfacility Data |
| IF | Intermediate Fix |
| IFCP | Interfacility Communications Processor |
| IFDS | Interfacility Data System |
| IFEA | In-Flight Emergency Assistance |
| IFO | International Field Office |
| IFR | Instrument Flight Rules |
| IFSS | International Flight Service Station |
| ILS | Instrument Landing System |
| IM | Inner Marker |
| IMC | Instrument Meteorological Conditions |
| INM | Integrated Noise Model |
| INS | Inertial Navigation System |
| IRMP | Information Resources Management Plan |
| ISDN | Integrated Services Digital Network |
| ISMLS | Interim Standard Microwave Landing System |
| ITI | Interactive Terminal Interface |
| IVRS | Interim Voice Response System |
| IW | Inside Wiring |
| K | top |
| Kbps | Kilobits Per Second |
| Khz | Kilohertz |
| KVDT | Keyboard Video Display Terminal |
| L | top |
| LAA | Local Airport Advisory |
| LAAS | Low Altitude Alert System |
| LABS | Leased A B Service |
| LABSC | LABS GS-200 Computer |
| LABSR | LABS Remote Equipment |
| LABSW | LABS Switch System |
| LAHSO | Land and Hold Short Operation |
| LAN | Local Area Network |
| LATA | Local Access and Transport Area |
| LAWRS | Limited Aviation Weather Reporting System |
| LCF | Local Control Facility |
| LCN | Local Communications Network |
| LDA | Localizer Directional Aid |
| LDA | Landing Directional Aid |
| LDIN | Lead-in Lights |
| LEC | Local Exchange Carrier |
| LF | Low Frequency |
| LINCS | Leased Interfacility NAS Communications System |
| LIS | Logistics and Inventory System |
| LLWAS | Low Level Wind Shear Alert System |
| LM/MS | Low/Medium Frequency |
| LMM | Locator Middle Marker |
| LMS | LORAN Monitor Site |
| LOC | Localizer |
| LOCID | Location Identifier |
| LOI | Letter of Intent |
| LOM | Compass Locator at Outer Marker |
| LORAN | Long Range Aid to Navigation |
| LPV | Lateral Precision Performance with Vertical Guidance |
| LRCO | Limited Remote Communications Outlet |
| LRNAV | Long Range Navigation |
| LRR | Long Range Radar |
| M | top |
| MAA | Maximum Authorized Altitude |
| MALS | Medium Intensity Approach Lighting System |
| MALSF | MALS with Sequenced Flashers |
| MALSR | MALS with Runway Alignment Indicator Lights |
| MAP | Maintenance Automation Program |
| MAP | Military Airport Program |
| MAP | Missed Approach Point |
| MAP | Modified Access Pricing |
| Mbps | Megabits Per Second |
| MCA | Minimum Crossing Altitude |
| MCAS | Marine Corps Air Station |
| MCC | Maintenance Control Center |
| MCL | Middle Compass Locater |
| MCS | Maintenance and Control System |
| MDA | Minimum Descent Altitude |
| MDT | Maintenance Data Terminal |
| MEA | Minimum En Route Altitude |
| METI | Meteorological Information |
| MF | Middle Frequency |
| MFJ | Modified Final Judgment |
| MFT | Meter Fix Crossing Time/Slot Time |
| MHA | Minimum Holding Altitude |
| Mhg | MegHERTZ |
| MIA | Minimum IFR Altitudes |
| MIDO | Manufacturing Inspection District Office |
| MIS | Meteorological Impact Statement |
| MISC | Miscellaneous |
| MISO | Manufacturing Inspection Satellite Office |
| MIT | Miles In Trail |
| MITRE | Mitre Corporation |
| MLS | Microwave Landing System |
| MM | Middle Marker |
| MMC | Maintenance Monitoring Console |
| MMS | Maintenance Monitoring System |
| MNPS | Minimum Navigation Performance Specification |
| MNPSA | Minimum Navigation Performance Specifications Airspace |
| MOA | Memorandum of Agreement |
| MOA | Military Operations Area |
| MOCA | Minimum Obstruction Clearance Altitude |
| MODE C | Altitude Encoded Beacon Reply |
| MODE C | Altitude Reporting Mode of Secondary Radar |
| MODE S | Mode Select Beacon System |
| MOU | Memorandum of Understanding |
| MPO | Metropolitan Planning Organization |
| MPS | Maintenance Processor Subsystem (OR) Master Plan Supplement |
| MRA | Minimum Reception Altitude |
| MRC | Monthly Recurring Charge |
| MSA | Minimum Safe Altitude |
| MSAW | Minimum Safe Altitude Warning |
| MSL | Mean Sea Level |
| MSN | Message Switching Network |
| MTCS | Modular Terminal Communications System |
| MTI | Moving Target Indicator |
| MUX | Multiplexor |
| MVA | Minimum Vectoring Altitude |
| MVFR | Marginal Visual Flight Rules |
| N | top |
| NAAQS | National Ambient Air Quality Standards |
| NADA | NADIN Concentrator |
| NADIN | National Airspace Data Interchange Network |
| NADSW | NADIN Switches |
| NAILS | National Airspace Integrated Logistics Support |
| NAMS | NADIN IA |
| NAPRS | National Airspace Performance Reporting System |
| NAS | National Airspace System or Naval Air Station |
| NASDC | National Aviation Safety Data |
| NASP | National Airspace System Plan |
| NASPAC | National Airspace System Performance Analysis Capability |
| NATCO | National Communications Switching Center |
| NAVAID | Navigation Aid |
| NAVMN | Navigation Monitor and Control |
| NAWAU | National Aviation Weather Advisory Unit |
| NAWPF | National Aviation Weather Processing Facility |
| NCAR | National Center for Atmospheric Research; Boulder, CO |
| NCF | National Control Facility |
| NCIU | NEXRAD Communications Interface Unit |
| NCP | Noise Compatibility Program |
| NCS | National Communications System |
| NDB | Non-Directional Radio Homing Beacon |
| NDNB | NADIN II |
| NEM | Noise Exposure Map |
| NEPA | National Environmental Policy Act |
| NEXRAD | Next Generation Weather Radar |
| NFAX | National Facsimile Service |
| NFDC | National Flight Data Center |
| NFIS | NAS Facilities Information System |
| NI | Network Interface |
| NICS | National Interfacility Communications System |
| NPE | Non-primary Airport Entitlement |
| NPIAS | National Plan of Integrated Airport Systems |
| NM | Nautical Mile |
| NMAC | Near Mid Air Collision |
| NMC | National Meteorological Center |
| NMCE | Network Monitoring and Control Equipment |
| NMCS | Network Monitoring and Control System |
| NOAA | National Oceanic and Atmospheric Administration |
| NOC | Notice Of Completion |
| NOTAM | Notice to Airmen |
| NPDES | National Pollutant Discharge Elimination System |
| NPIAS | National Plan of Integrated Airport Systems |
| NRC | Non-Recurring Charge |
| NRCS | National Radio Communications Systems |
| NSAP | National Service Assurance Plan |
| NSRCATN | National Strategy to Reduce Congestion on America's Transportation Network |
| NSSFC | National Severe Storms Forecast Center |
| NSSL | National Severe Storms Laboratory; Norman, OK |
| NTAP | Notices To Airmen Publication |
| NTP | National Transportation Policy |
| NTSB | National Transportation Safety Board |
| NTZ | No Transgression Zone |
| NWS | National Weather Service |
| NWSR | NWS Weather Excluding NXRD |
| NSWRH | NWS Regional Headquarters |
| NXRD | Advanced Weather Radar System |
| O | top |
| OAG | Official Airline Guide |
| OALT | Operational Acceptable Level of Traffic |
| OAT | Outside Air Temperature |
| OAW | Off-airway Weather Station |
| ODAL | Omnidirectional Approach Lighting System |
| ODAPS | Oceanic Display and Processing Station |
| OEP | Operational Evolution Plan / Partnership |
| OFA | Object Free Area |
| OFDPS | Offshore Flight Data Processing System |
| OFT | Outer Fix Time |
| OFZ | Obstacle Free Zone |
| OM | Outer Marker |
| OMB | Office of Management and Budget |
| ONER | Oceanic Navigational Error Report |
| OPLT | Operational Acceptable Level of Traffic |
| OPSW | Operational Switch |
| OPX | Off Premises Exchange |
| ORD | Operational Readiness Demonstration |
| OTR | Oceanic Transition Route |
| OTS | Organized Track System |
| P | top |
| PABX | Private Automated Branch Exchange |
| PAD | Packet Assembler/Disassembler |
| PAM | Peripheral Adapter Module |
| PAPI | Precision Approach Path Indicator |
| PAR | Precision Approach Radar |
| PAR | Preferential Arrival Route |
| PATWAS | Pilots Automatic Telephone Weather Answering Service |
| PBCT | Proposed Boundary Crossing Time |
| PBRF | Pilot Briefing |
| PBX | Private Branch Exchange |
| PCA | Positive Control Airspace |
| PCM | Pulse Code Modulation |
| PDAR | Preferential Arrival And Departure Route |
| PDC | Pre-Departure Clearance |
| PDC | Program Designator Code |
| PDR | Preferential Departure Route |
| PDN | Public Data Network |
| PFC | Passenger Facility Charge |
| PGP | Planning Grant Program |
| PIC | Principal Interexchange Carrier |
| PIDP | Programmable Indicator Data Processor |
| PIREP | Pilot Weather Report |
| PMS | Program Management System |
| POLIC | Police Station |
| POP | Point Of Presence |
| POT | Point Of Termination |
| PPIMS | Personal Property Information Management System |
| PR | Primary Commercial Service Airport |
| PRI | Primary Rate Interface |
| PRM | Precision Runway Monitor |
| PSDN | Public Switched Data Network |
| PSN | Packet Switched Network |
| PSS | Packet Switched Service |
| PSTN | Public Switched Telephone Network |
| PTC | Presumed-to-Conform |
| PUB | Publication |
| PUP | Principal User Processor |
| PVC | Permanent Virtual Circuit |
| PVD | Plan View Display |
| R | top |
| RAIL | Runway Alignment Indicator Lights |
| RAPCO | Radar Approach Control (USAF) |
| RAPCON | Radar Approach Control (FAA) |
| RATCC | Radar Air Traffic Control Center |
| RATCF | Radar Air Traffic Control Facility (USN) |
| RBC | Rotating Beam Ceilometer |
| RBDPE | Radar Beacon Data Processing Equipment |
| RBSS | Radar Bomb Scoring Squadron |
| RCAG | Remote Communications Air/Ground |
| RCC | Rescue Coordination Center |
| RCF | Remote Communication Facility |
| RCCC | Regional Communications Control Centers |
| RCIU | Remote Control Interface Unit |
| RCL | Radio Communications Link |
| RCLR | RCL Repeater |
| RCLT | RCL Terminal |
| RCO | Remote Communications Outlet |
| RCU | Remote Control Unit |
| RDAT | Digitized Radar Data |
| RDP | Radar Data Processing |
| RDSIM | Runway Delay Simulation Model |
| REIL | Runway End Identification Lights |
| RF | Radio Frequency |
| RL | General Aviation Reliever Airport |
| RMCC | Remote Monitor Control Center |
| RMCF | Remote Monitor Control Facility |
| RML | Radio Microwave Link |
| RMLR | RML Repeater |
| RMLT | RML Terminal |
| RMM | Remote Maintenance Monitoring |
| RMMS | Remote Maintenance Monitoring System |
| RMS | Remote Monitoring Subsystem |
| RMSC | Remote Monitoring Subsystem Concentrator |
| RNAV | Area Navigation |
| RNP | Required Navigation Performance |
| ROD | Record of Decision |
| ROSA | Report of Service Activity |
| ROT | Runway Occupancy Time |
| RP | Restoration Priority |
| RPC | Restoration Priority Code |
| RPG | Radar Processing Group |
| RPZ | Runway Protection Zone |
| RRH | Remote Reading Hygrothermometer |
| RRHS | Remote Reading Hydrometer |
| RRWDS | Remote Radar Weather Display |
| RRWSS | RWDS Sensor Site |
| RSA | Runway Safety Area |
| RSAT | Runway Safety Action Team |
| RSS | Remote Speaking System |
| RT | Remote Transmitter |
| RT & BTL | Radar Tracking And Beacon Tracking Level |
| RTAD | Remote Tower Alphanumerics Display |
| RTCA | Radio Technical Commission for Aeronautics |
| RTP | Regional Transportation Plan |
| RTR | Remote Transmitter/Receiver |
| RTRD | Remote Tower Radar Display |
| RVR | Runway Visual Range |
| RW | Runway |
| RWDS | Same as RRWDS |
| RWP | Real-time Weather Processor |
| S | top |
| S/S | Sector Suite |
| SAC | Strategic Air Command |
| SAFI | Semi Automatic Flight Inspection |
| SALS | Short Approach Lighting System |
| SATCOM | Satellite Communications |
| SAWRS | Supplementary Aviation Weather Reporting System |
| SBGP | State Block Grant Program |
| SCC | System Command Center |
| SCVTS | Switched Compressed Video Telecommunications Service |
| SDF | Simplified Direction Finding |
| SDF | Software Defined Network |
| SDIS | Switched Digital Integrated Service |
| SDP | Service Delivery Point |
| SDS | Switched Data Service |
| SEL | Single Event Level |
| SELF | Simplified Short Approach Lighting System With Sequenced Flashing Lights |
| SFAR38 | Special Federal Aviation Regulation 38 |
| SHPO | State Historic Preservation Officer |
| SIC | Service Initiation Charge |
| SID | Station Identifier |
| SID | Standard Instrument Departure |
| SIGMET | Significant Meteorological Information |
| SIMMOD | Airport and Airspace Simulation Model |
| SIP | State Implementation Plan |
| SM | Statute Miles |
| SMGC | Surface Movement Guidance and Control |
| SMPS | Sector Maintenance Processor Subsystem |
| SMS | Safety Management System |
| SMS | Simulation Modeling System |
| SNR | Signal-to-Noise Ratio, also: S/N |
| SOC | Service Oversight Center |
| SOAR | System of Airports Reporting |
| SOIR | Simultaneous Operations On Intersecting Runways |
| SOIWR | Simultaneous Operations on Intersecting Wet Runways |
| SRA | Surveillance Radar Approach |
| SRAP | Sensor Receiver and Processor |
| SSALF | SSALS with Sequenced Flashers |
| SSALR | Simplified Short Approach Lighting System |
| SSB | Single Side Band |
| STAR | Standard Terminal Arrival Route |
| STD | Standard |
| STMUX | Statistical Data Multiplexer |
| STOL | Short Takeoff and Landing |
| SURPIC | Surface Picture |
| SVCA | Service A |
| SVCB | Service B |
| SVCC | Service C |
| SVCO | Service O |
| SVFO | Interphone Service F (A) |
| SVFB | Interphone Service F (B) |
| SVFC | Interphone Service F (C) |
| SVFD | Interphone Service F (D) |
| SVFR | Special Visual Flight Rules |
| T | top |
| T1MUX | T1 Multiplexer |
| TAAS | Terminal Advance Automation System |
| TACAN | Tactical Aircraft Control and Navigation |
| TACR | TACAN at VOR |
| TAF | Terminal Area Forecast |
| TARS | Terminal Automated Radar Service |
| TAS | True Air Speed |
| TATCA | Terminal Air Traffic Control Automation |
| TAVT | Terminal Airspace Visualization Tool |
| TCA | Traffic Control Airport or Tower Control Airport |
| TCA | Terminal Control Area |
| TCACCIS | Transportation Coordinator Automated Command and Control Information System |
| TCAS | Traffic Alert And Collision Avoidance System |
| TCC | DOT Transportation Computer Center |
| TCCC | Tower Control Computer Complex |
| TCE | Tone Control Equipment |
| TCLT | Tentative Calculated Landing Time |
| TCO | Telecommunications Certification Officer |
| TCOM | Terminal Communications |
| TCS | Tower Communications System |
| TDLS | Tower Data-Link Services |
| TDMUX | Time Division Data Multiplexer |
| TDWR | Terminal Doppler Weather Radar |
| TELCO | Telephone Company |
| TELMS | Telecommunications Management System |
| TERPS | Terminal Instrument Procedures |
| TFAC | To Facility |
| TH | Threshold |
| TIMS | Telecommunications Information Management System |
| TIPS | Terminal Information Processing System |
| TL | Taxilane |
| TMA | Traffic Management Advisor |
| TMC | Traffic Management Coordinator |
| TMC/MC | Traffic Management Coordinator/Military Coordinator |
| TMCC | Terminal Information Processing System |
| TMCC | Traffic Management Computer Complex |
| TMF | Traffic Management Facility |
| TML | Television Microwave Link |
| TMLI | Television Microwave Link Indicator |
| TMLR | Television Microwave Link Repeater |
| TMLT | Television Microwave Link Terminal |
| TM&O | Telecommunications Management and Operations |
| TMP | Traffic Management Processor |
| TMS | Traffic Management System |
| TMSPS | Traffic Management Specialists |
| TMU | Traffic Management Unit |
| TODA | Takeoff Distance Available |
| TOF | Time Of Flight |
| TOFMS | Time of Flight Mass Spectrometer |
| TOPS | Telecommunications Ordering and Pricing System (GSA software tool) |
| TORA | Take-off Run Available |
| TNAV | Terminal Navigational Aids |
| TR | Telecommunications Request |
| TRACAB | Terminal Radar Approach Control in Tower Cab |
| TRACON | Terminal Radar Approach Control Facility |
| TRAD | Terminal Radar Service |
| TRB | Transportation Research Board |
| TRNG | Training |
| TSA | Taxiway Safety Area |
| TSEC | Terminal Secondary Radar Service |
| TSP | Telecommunications Service Priority |
| TSR | Telecommunications Service Request |
| TSYS | Terminal Equipment Systems |
| TTMA | TRACON Traffic Management Advisor |
| TTY | Teletype |
| TVOR | Terminal VHF Omnidirectional Range |
| TW | Taxiway |
| TWEB | Transcribed Weather Broadcast |
| TWR | Tower (non-controlled) |
| TY | Type (FAACIS) |
| U | top |
| UAS | Uniform Accounting System |
| UHF | Ultra High Frequency |
| URA | Uniform Relocation Assistance and Real Property Acquisition Policies Act of 1970 |
| USAF | United States Air Force |
| USC | United States Code |
| USOC | Uniform Service Order Code |
| V | top |
| VALE | Voluntary Airport Low Emission |
| VASI | Visual Approach Slope Indicator |
| VDME | VOR with Distance Measuring Equipment |
| VF | Voice Frequency |
| VFR | Visual Flight Rules |
| VHF | Very High Frequency |
| VLF | Very Low Frequency |
| VMC | Visual Meteorological Conditions |
| VNAV | Visual Navigational Aids |
| VNTSC | Volpe National Transportation System Center |
| VON | Virtual On-net |
| VOR | VHF Omnidirectional Range |
| VOR/DME | VHF Omnidirectional Range/Distance Measuring Equipment |
| VORTAC | VOR collocated with TACAN |
| VOT | VOR Test Facility |
| VP/D | Vehicle/Pedestrian Deviation |
| VRS | Voice Recording System |
| VSCS | Voice Switching and Control System |
| VTA | Vertex Time of Arrival |
| VTAC | VOR collocated with TACAN |
| VTOL | Vertical Takeoff and Landing |
| VTS | Voice Telecommunications System |
| W | top |
| WAAS | Wide Area Augmentation System |
| WAN | Wide Area Network |
| WC | Work Center |
| WCP | Weather Communications Processor |
| WECO | Western Electric Company |
| WESCOM | Western Electric Satellite Communications |
| WMSC | Weather Message Switching Center |
| WMSCR | Weather Message Switching Center Replacement |
| WSCMO | Weather Service Contract Meteorological Observatory |
| WSFO | Weather Service Forecast Office |
| WSMO | Weather Service Meteorological Observatory |
| WSO | Weather Service Office |
| WTHR | Weather |
| WX | Weather |
