A

• A&E :Architecture and Engineering
• A/C :Aircraft
• A/G :Air to Ground
• A/H :Altitude/Height
• AAA :Airport Airspace Analysis
• AAC :Mike Monroney Aeronautical Center
• AADC :Airport Average Daily Capacity
• AAF :Airway Facilities Service
• AAF :Army Air Field
• AAF-1 :Director of Airway Facilities
• AAI :Arrival Aircraft Interval
• AAI :FAA Office of Accident Investigation
• AAL :Alaska Region
• AAM :Office of Aerospace Medicine
• AAMS :Aircraft Arrival Management System
• AAP :Advanced Automation Program
• AAR :After Action Review
• AAR :Airport Acceptance Rate
• AAR :Airport and Aircraft Safety Research and Development
• AAS :Advanced Automation System
• AASR :Aging Aircraft Safety Rule
• AAT :Associate Administrator for Air Traffic
• ABA :FAA Office of Financial Services
• ABA :Office of Budget
• ABDIS :Automated Data Interchange System Service
• AC :Advisory Circular
• ACAA :Air Carrier Association of America
• 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
• ACE :Central Region
• ACEP :Airport Capacity Enhancement Plan
• 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
• ACIP :Automated Conformity Inspection Process
• ACLS :Automatic Carrier Landing System
• ACLT :Actual Landing Time Calculated
• ACO :Aircraft Certification Office
• ACO :Associate Contracting Officer
• ACO :Office of Airports Compliance and Field Operations
• ACR :FAA Office of Civil Rights
• ACRP :Airport Cooperative Research Program
• ACSEP :Aircraft Certification Systems Evaluation Program
• ACT :William J. Hughes Technical Center
• AD :Airworthiness Directive
• ADA :Air Defense Area
• ADAP :Airport Development Aid Program
• ADAS :Automated Weather Observing System Data Acquisition System
• ADAS :AWOS Data Acquisition System
• ADC :Air Defense Command
• ADCCP :Advanced Data Communications Control Procedure
• ADDA :Administrative Data
• ADDS :Aviation Digital Data Service
• ADF :Automatic Direction Finding
• ADI :Automatic De-Ice and Inhibitor
• ADIC :ATS Interfacility Data Communications
• ADIN :AUTODIN Service
• ADIZ :Air Defense Identification Zone
• ADL :Aeronautical Data Link
• ADLO :Air Defense Liaison Office
• ADLY :Arrival Delay
• ADM :Aeronautical Decision Making
• ADO :Airline Dispatch Office
• ADO :Airport District Office
• ADP :Automated Data Processing
• ADS :Automated Distribution System
• ADS :Automatic Dependent Surveillance
• ADS-B :Automatic Dependent Surveillance-Broadcast
• ADSIM :Airfield Delay Simulation Model
• ADSY :Administrative Equipment Systems
• ADTN :Administrative Data Transmission Network
• ADTN2000 :Administrative Data Transmission Network 2000
• ADVO :Administrative Voice
• AEA :Eastern Region
• AED :Automated External Defibrillator
• AEDT :Aviation Environmental Design Tool
• AEE :FAA Office of Environment and Energy
• AEEC :Airlines Electronic Engineering Committee
• AEG :Aircraft Evaluation Group
• AEP :FAA Office of Aviation Policy Planning and Environment
• AERA :Automated En-Route Air Traffic Control
• AEX :Automated Execution
• AF :Air Force
• AF :Airway Facilities
• AFB :Air Force Base
• AFDSS :Air Fix Data Sub Set
• AFER :Aircraft Fuel Expense Reconciliation System
• AFIS :Automated Flight Inspection System
• AFMS :Automatic Flight Management System
• AFMT :Airway Facilities Management Team
• AFO :Airport Field Office
• AFP :Airspace Flow Program
• AFP :Area Flight Plan
• AFRES :Air Force Reserve Station
• AFS :Airways Facilities Sector
• AFS :Flight Standards Service
• AFSFO :AFS Field Office
• AFSFU :AFS Field Unit
• AFSOU :AFS Field Office Unit (Standard is AFSFOU)
• AFSS :Automated Flight Service Station
• AFTIL :Airway Facilities Tower Integration Laboratory
• AFTN :Automated Fixed Telecommunications Network
• AFZ :Resource Management
• AGC :FAA Office of the Chief Counsel
• AGHME :Aircraft Geometric Height Measurement Element
• AGI :FAA Office of Government and Industry Affairs
• AGL :Above Ground Level
• AGL :Alliance Great Lakes Region
• AHR :FAA Office of Human Resources
• AICS :Aircraft Inventory and Charter System
• AID :Airport Information Desk
• AIFSS :Automated International Flight Service
• AIG :Airbus Industries Group
• AILS :Automatic Instrument Landing System
• AIM :Aeronautical Information Manual
• AIM :Airman's Information Manual
• AIP :Aeronautical Information Publication
• AIP :Airport Improvement Plan
• AIP :Airport Improvement Program
• AIPA :Aeronautical Information Production Application
• AIR :Aircraft Certification Service
• AIRMET :Airmen's Meteorological Information
• AIRNAV :Airports and Navigation Aids Database System
• AIRNET :Airport Network Simulation Model
• AIRPAC :Advisor for the Intelligent Resolution of Predicted Aircraft
• AIS :Aeronautical Information Service
• AIS :Aeronautical Information System
• AIS :FAA Office of Information Systems Security
• AIS :Aeronautical Information System
• AIT :Automated Information Transfer
• AITS :Automated Inventory Tracking System
• AJA :Acquisition & Business Services, Air Traffic Organization
• AJC :Communications Services, Air Traffic Organization
• AJE :En Route & Oceanic Service, Air Traffic Organization
• AJF :Finance Services, Air Traffic Organization
• AJO :Chief Operating Officer, Air Traffic Organization
• AJP :Operations Planning Services, Air Traffic Organization
• AJR :System Operations Services, Air Traffic Organization
• AJS :Safety Services, Air Traffic Organization
• AJT :Terminal Service, Air Traffic Organization
• AJW :Technical Operation Services, Air Traffic Organization
• ALO :Aviation Logistics Organization
• ALP :Airport Layout Plan
• ALPA :Airlines Pilots Association
• ALS :Approach Lighting System
• ALSF :Approach Lighting System With Sequenced Flashing Lights
• 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
• AMC :Mike Monroney Aeronautical Center
• AMCC :ACF/ARTCC Maintenance Control Center
• AMCC :Air Route Traffic Control Center Maintenance Control Center
• AMIC :Area Manager in Charge
• AMIS :Aircraft Management Information System
• AMOC :Alternative Methods of Compliance
• AMOS :Automated Meteorological Observation Station
• AMP :ARINC Message Processor (OR) Airport Master Plan
• AMS :Acquisition Management System
• AMT :Aviation Maintenance Technician
• AMVER :Automated Mutual Assistance Vessel Rescue System
• ANC :Alternate Network Connectivity
• ANCA :Airport Noise and Capacity Act
• AND :Associate Administrator for NAS Development
• ANE :New England Region
• ANG :Air National Guard
• ANGB :Air National Guard Base
• ANM :Northwest Mountain Region
• ANMS :Automated Network Monitoring System
• ANS :NAS Transition and Integration Directorate
• ANS :NAS Transitions and Implementation
• ANSI :American National Standards Institute
• AO :Authorizing Official
• AOA :Air Operations Area
• AOA :FAA Office of the Administrator
• AOAS :Advanced Oceanic Automation System
• AOC :Airline Operational Control Center
• AOC :FAA Office of Communications
• AOCC :Atlantic Operations Control Center
• AODR :Authorizing Official Designated Representative
• AOP :NAS Operations
• AOPA :Aircraft Owners and Pilots Association
• AOS :Operational Support Service
• AOV :Air Traffic Safety Oversight Service
• AP :Acquisition Plan
• APB :Acquisition Program Baselines
• API :FAA Office of International Aviation
• APM :Approach Path Monitor
• APP :Approach
• APS :Airport Planning Standard
• APTS :Automated Personnel Tracking System
• APTS :AVN (Aviation Systems Standards) Process Tracking System
• AQAFO :Aeronautical Quality Assurance Field Office
• AQS :FAA Office of Quality, Integration and Executive Services
• ARA :Research and Acquisition
• ARAC :Army Radar Approach Control (AAF)
• ARAC :Aviation Rulemaking Advisory Committee
• ARC :Administrator's Review Committee
• ARC :Airlines Reporting Corporation
• ARC :Aviation Review Committee
• ARC :FAA Office of Regions and Center Operations
• ARCTR :FAA Aeronautical Center or Academy
• AREA :Automated En Route Air Traffic Control
• ARF :Airport Reservation Function
• ARFF :Aircraft Rescue and Fire Fighting
• ARINC :Aeronautical Radio Incorporated
• ARINC :Aeronautical Radio, Inc.
• ARLNO :Airline Office
• ARM :FAA Office of Rulemaking
• ARO :Airport Reservation Office
• ARP :Airport Reference Point
• ARP :FAA Airports Organization
• ARP :FAA Office of Airports
• ARS :Air Traffic Requirements Service
• ARS :Airport Surveillance Radar
• ARS :Automated Reproduction System
• ARSA :Airport Service Radar Area
• ARSR :Air Route Surveillance Radar
• ARSR :Long Range Surveillance Radar
• ARTCC :Air Route Traffic Control Center
• ARTS :Automated Radar Terminal System
• ASAP :Aviation Safety Action Program
• ASAS :Aviation Safety Analysis System
• ASC :AUTODIN Switching Center
• ASCP :Aviation System Capacity Plan
• ASD :Aircraft Situation Display
• ASDA :Accelerate Stop Distance Available
• ASDE :Area Surveillance Detection Equipment - (Radar)
• ASDE-X :Airport Surface Detection Equipment
• ASH :FAA Office of Security & Hazardous Materials
• ASI :Aviation Safety Inspector
• ASIAS :Aviation Safety Information Analysis and Sharing
• ASLAR :Aircraft Surge Launch And Recovery
• ASM :Available Seat Mile
• ASO :Southern Region
• ASOS :Automated Surface Observing System
• ASOS :Automated Surface Observing Systems
• ASP :Arrival Sequencing Program
• ASPM :Aviation System Performance Metrics
• ASPM :Aviation System Performance Metrics
• ASQP :Airline Service Quality Performance
• ASR :Airport Surveillance Radar
• ASR :Airways Facilities Spectrum Policy and Management
• ASR :Alkali Silica Reactivity
• ASR :Terminal Surveillance Radar
• ASR-WSP :Airport Surveillance Radar-Weather System Processor
• AST :FAA Office of Commercial Space Transportation
• ASTA :Airport Surface Traffic Automation
• ASV :Airline Schedule Vendor
• ASW :Southwest Region
• ASYNC :Asynchronous Concentrator
• AT :Air Traffic
• AT&T :American Telephone and Telegraph
• AT&T :ASDC AT&T Agency Service Delivery Center
• AT&T :CSA AT&T Customer Support Associate
• ATA :Air Transport Association of America
• ATA :Airline Transport Association
• ATAS :Airspace and Traffic Advisory Service
• ATC :Air Traffic Control
• ATCA :Air Traffic Control Association
• ATCAA :Air Traffic Control Assigned Airspace
• ATCAA :ATC Assigned Airspace
• ATCBI :Maintenance of Air Traffic Control Beacon Indicator
• ATCCC :Air Traffic Control Command Center
• ATCO :Air Taxi Commercial Operator
• ATCOTS :Air Traffic Control Optimum Training Solutions
• ATCRB :Air Traffic Control Radar Beacon
• ATCRBS :Air Traffic Control Radar Beacon System
• ATCS :Air Traffic Control Specialist
• ATCSCC :Air Traffic Control Systems Command Center
• ATCT :Airport Traffic Control Tower
• ATIDS :Airport Surface Target Identification System
• ATIS :Automated Terminal Information Service
• ATIS :Automatic Terminal Information Service
• ATIS :Automatic Terminal Information Service
• ATISR :ATIS Recorder
• ATM :Air Traffic Management
• ATM :Air Traffic Manager
• ATM :Asynchronous Transfer Mode
• ATMAC :Air Traffic Management Advisory Committee
• ATMS :Advanced Traffic Management System
• ATMS :Automated Training Management System
• ATN :Aeronautical Telecommunications Network
• ATO :Air Traffic Organization
• ATODN :AUTODIN Terminal (FUS)
• ATOMS :Air Traffic Operations Management System
• ATOP :Advanced Technologies and Oceanic Procedures
• ATOS :Air Transportation Oversight System
• ATOVN :AUOTVON (Facility)
• ATR :Air Traffic Requirements
• ATREP :Air Traffic Representative
• ATS :Air Traffic Services
• ATSAP :Air Traffic Safety Action Program
• ATSCCP :ATS Contingency Command Post
• ATSS :Airway Transportation Systems Specialist
• ATTIS :AT&T Information Systems
• AUTODIN :DoD Automatic Digital Network
• AUTOVON :DoD Automatic Voice Network
• AVN :Aviation Standards National Field Office, Oklahoma City
• AVN :Aviation System Standards
• AVON :AUTOVON Service
• AVS :FAA Office of Aviation Safety
• AVSI :Aerospace Vehicle Systems Institute
• AWIS :Airport Weather Information
• AWOS :Automated Weather Observing System
• AWP :Aviation Weather Processor
• AWP :Western Pacific Region
• AWPG :Aviation Weather Products Generator
• AWS :Air Weather Station
• AWSS :Automated Weather Sensors System
• AWTT :Aviation Weather Technology Transfer
• AXX :One of the 9 Regional Offices

B

• BA :Budget Analyst
• BAD :Budget Analysis Database
• 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
• BERMS :Beacon Environmental Remote Monitoring Subsystem
• BFO :Backfill Overtime
• BFO :Blazing Flash of the Obvious (DOD)
• BIM :Building Information Modeling
• BIP :Backup Interface Processor
• BMP :Best Management Practices
• BOC :Bell Operating Company
• BOD :Beneficial Occupancy Date
• BPB :Business Plan Builder
• BPS :Bits Per Second
• BRI :Basic Rate Interface
• BRITE :Bright Radar Indicator Terminal Equipment
• BRITE :Bright Radar Indicator Tower Equipment
• BRL :Building Restriction Line
• BUEC :Back-up Emergency Communications
• BUECE :Back-up Emergency Communications Equipment

C

• C&A :Certification and Accreditation
• C/S/S/N :Capacity/Safety/Security/Noise
• CA :Conflict Alert
• CAA :Civil Airworthiness Authority
• CAA :Civil Aviation Authority
• CAA :Clean Air Act
• CAAFI :Commercial Aviation Alternative Fuels Initiative
• CAASD :Center for Advanced Aviation System Development
• CAB :Civil Aeronautics Board
• CAD :Computer-aided Design
• CAD :Computer-aided Drawing
• CAD :Computer-aided Design
• CAEG :Computer-aided Engineering Graphics
• CAI :Contractor-Acceptance Inspection
• CAIRS :Cable Assignment Information Retrieval System
• CAMI :Civil Aerospace Medical Institute
• CAP :Civil Air Patrol
• CAR :Civil Aviation Regulations
• CARAT :Center for Aviation Research and Aerospace Technology
• CARF :Central Altitude Reservation Facility
• CARF :Central Altitude Reservation Function
• CARS :Civilian Air Routes System
• CARSR :Common Air Route Surveillance Radar
• CARTS :Common Automated Radar Terminal System
• CAS :Cost Accounting System
• CASA :Controller Automated Spacing Aid
• CASFO :Civil Aviation Security Office
• CASS :Continuing Analysis and Surveillance System
• CASST :Commercial Aviation Safety Strategic Team
• CAST :Certification Authority Software Team
• CASTLE :Consolidated Automated System for Time and Labor Entry
• CAT :Category
• CAT :Clear Air Turbulence
• CATTS :Computerized Air Traffic Training System
• CATX :Categorical Exclusion
• CAU :Crypto Ancillary Unit
• CBI :Computer Based Instruction
• CC :Construction Coordinator
• CC&O :Customer Cost and Obligation
• CCC :Communications Command Center
• CCCC :Staff Communications
• CCCH :Central Computer Complex Host
• CCS7-NI :Communication Channel Signal-7 Network Interconnect
• CCSD :Command Communications Service Designator
• CCU :Central Control Unit
• CD :Common Digitizer
• CD :Compact Disc
• CD-ROM :Compact Disc Read-Only Memory
• CDA :Continuous Descent Arrival
• CDB :Corporate Database
• CDC :Computer Display Channel
• CDD :Corporate Data Dictionary
• CDL :Configuration Deviation List
• CDM :Collaborative Decision Making
• CDR :Cost Detail Report
• CDRA :Cooperative Research and Development Agreement
• CDS :Central Dispatch System
• CDT :Controlled Departure Time
• CDTI :Cockpit Display of Traffic Information
• CDV :Compressed Digital Video
• CED :Categorical Exclusion Determination
• CENRAP :Center Radar Arts Presentation
• CENTX :Central Telephone Exchange
• CEP :Capacity Enhancement Program
• CEQ :Council on Environmental Quality
• CERAP :Center Radar Approach Control
• CERAP :Central Radar Approach
• CFC :Central Flow Control
• CFCF :Central Flow Control Facility
• CFCS :Central Flow Control Service
• CFI :Certified Flight Instructor
• CFIT :Controlled Flight Into Terrain
• CFR :Code of Federal Regulations
• CFWP :Central Flow Weather Processor
• CFWU :Central Flow Weather Unit
• CG :Center of Gravity
• CGAS :Coast Guard Air Station
• CHI :Computer Human Interface
• CIO :Chief Information Officer
• CIP :Capital Investment Plan
• CISO :Chief Information Security Officer
• CIWS :Corridor Integrated Weather System
• CLC :Course Line Computer
• CLEEN :Continuous Lower Energy, Emissions & Noise
• CLIN :Contract Line Item
• CLT :Calculated Landing Time
• CM :Configuration Management
• CMAP :Center Mapping Automation Program
• CMFO :Certificate Management Field Office
• CMIS :Certificate Management Information System
• CMO :Certificate Management Office
• CMU :Certificate Management Unit
• CNMPS :Canadian Minimum Navigation Performance Specification Airspace
• CNS :Communications, Navigation and Surveillance
• CNS :Consolidated NOTAM System
• CNSP :Consolidated NOTAM System Processor
• CO :Central Office
• CO :Contracting Officer
• COE :Center of Excellence
• COE :U.S. Army Corps of Engineers
• COMCO :Command Communications Outlet
• CONOPS :Concept of Operations
• CONUS :Continental United States
• COOP :Continuity of Operations Plan
• CORP :Private Corporation other than ARINC or MITRE
• COTR :Contracting Officer's Technical Representative
• COTR :Contracting Officer's Technical Representative
• COTS :Commercial Off-the-Shelf
• CP :Conflict Probe
• CPC :Certified Professional Controller
• CPCS :Consolidated Production Control System
• CPDLC :Controller Pilot Data Link Communications
• CPE :Customer Premise Equipment
• CPIC :Capital Planning and Investment Control
• CPMIS :Consolidated Personnel Management Information System
• CRA :Conflict Resolution Advisory
• CRC :Coordinating Research Council
• CRDA :Converging Runway Display Aid
• CRDA :Cooperative Research & Development Agreement
• CRM :Crew Resource Management
• CRT :Cathode Ray Tube
• CSA :Central Service Area
• CSA :Communications Service Authorization
• CSA :Comparative Safety Assessment
• CSA :Central Service Area
• CSAP :Combined Services Access Point
• CSAP :Common Services Access Point
• CSC :Central Service Center
• CSC :Central Service Center
• CSER :Contractor Site Engineering Report
• CSIS :Centralized Storm Information System
• CSMC :Cyber Security Management Center
• CSO :Customer Service Office
• CSR :Communications Service Request
• CSS :Central Site System
• CSTA :Chief Scientist and Technical Advisor
• CSTWRK :Cost Work
• CTA :Control Area
• CTA :Controlled Time of Arrival
• 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
• CWO :Contract Weather Observer
• CWP :Central Weather Processor
• CWP :Corporate Work Plan
• CWSU :Central Weather Service Unit
• CWY :Clearway

D

• D-ATIS :Digital - Automatic Terminal Information Service
• DA :Decision Altitude/Decision Height
• DA :Descent Advisor
• DA :Direct Access
• DA/H :Decision Altitude/Height
• DABBS :DITCO Automated Bulletin Board System
• DACS :Digital Aeronautical Chart Supplement
• DADS :Digital Aeronautical Database System
• DAFIS :Departmental Accounting and Financial Information System
• DAIR :Direct Altitude and Identity Readout
• DALR :Digital Audio Legal Recorder
• DAR :Designated Agency Representative
• DARC :Direct Access Radar Channel
• DARP :Dynamic Aircraft Route Planning
• DASI :Digital Altimeter Setting Indicator
• DASR :Digital Airport Surveillance Radar
• DB :Database
• dB :Decibel
• DBA :Database Administrator
• 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
• DCC :Direct Channel Complex
• 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
• DEM :Digital Elevation Model
• DEP :Departure
• DEWIZ :Distance Early Warning Identification Zone
• DF :Direction Finder
• DFAX :Digital Facsimile
• DFI :Direction Finding Indicator
• DFL :Daily Flight Log
• DFM :Departure Flow Management
• DGNSS :Differential Global Navigation Satellite System
• DGPS :Differential Global Positioning Satellite (System)
• DGPS :Differential Global Positioning System
• DH :Decision Height
• DHS :Department of Homeland Security
• DIA :Denver International Airport
• DID :Direct Inward Dial
• DIP :Drop and Insert Point
• DIRF :Direction Finding
• DISU :Drug Investigation Support Unit
• DITCO :Defense Information Technology Contracting Office Agency
• DLAP :Data Link Applications Processor
• DLRS :Digital Legal Recording System
• DME :Distance Measuring Equipment
• DME/P :Precision Distance Measuring Equipment
• DMN :Data Multiplexing Network
• DMRS :Database Management Reporting System
• DMS :Data Management System
• DMS :Drawing Management System
• DNL :Day-Night Equivalent Sound Level
• DOD :Department of Defense
• DOD :Direct Outward Dial
• DOF :Digital Obstacle File
• DOI :Department of Interior
• DOS :Department of State
• DOT :Department of Transportation
• DOTCC :Department of Transportation Computer Center
• DOTS :Dynamic Ocean Track System
• DOTS :Dynamic Ocean Tracking System
• DOVE :DSR Oceanic VSCS En Route Implementation Working Group
• DP :Departure Procedures
• DPE :Designated Pilot Examiner
• DR :Disaster Recovery
• DRP :Disaster Recovery Plan
• DSCS :Digital Satellite Compression Service
• DSG :Data Services Group
• DSP :Departure Sequencing Program
• DSR :Display System Replacement
• DSS :Decision Support System
• DSUA :Dynamic Special Use Airspace
• DTED :Digital Terrain Elevation Data
• DTM :Digital Terrain Model
• DTS :Dedicated Transmission Service
• DUAT :Direct User Access Terminal
• DUATS :Direct User Access Terminal System
• DVD :Digital Versatile Disk
• DVFR :Day Visual Flight Rules
• DVFR :Defense Visual Flight Rules
• DVOF :Digital Vertical Obstruction File
• DVOR :Doppler Very High Frequency Omni Directional Range
• DVOR :Doppler Very High Frequency Omni-- Directional Range
• DVRS :Digital Voice Recorder System
• DYSIM :Dynamic Simulator

E

• E-MSAW :En Route Automated Minimum Safe Altitude Warning
• EA :Enterprise Architecture
• EA :Environmental Assessment
• EARS :En Route Analysis and Reporting System
• EARTS :En Route Automated Radar Tracking System
• EASA :European Aviation Safety Agency
• EBC :Event Based Currency
• EBUS :Enhanced Backup Surveillance
• EC :Engineering Center
• ECG :En Route Communications Gateway
• ECOM :En Route Communications
• eCPIC :Electronic Capital Planning Investment Control
• ECVFP :Expanded Charted Visual Flight Procedures
• EDC :Early Display Configuration
• EDC :En Route Departure Capability
• EDC :Enterprise Data Center
• EDCT :Estimated Departure Control Time
• EDCT :Expedite Departure Path
• EDDA :Environmental Due Diligence Audit
• EDI :Electronic Data Interchange
• EDMS :Electronic Document Management Systems
• EDMS :Emissions and Dispersion Modeling System
• EDS :Enterprise Database System
• EEO :Equal Employment Opportunity
• EFAS :En Route Flight Advisory Service
• EFB :Electronic Flight Bag
• EFC :Expect Further Clearance
• EFIS :Electronic Flight Information Systems
• EFSTS :Electronic Flight Strip Transfer System
• EIAF :Expanded Inward Access Features
• EIS :Environmental Impact Statement
• ELD :Electrical Load Database
• eLMS :Electronic Learning Management System
• 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
• EOF :Emergency Operating Facility
• eOPF :Electronic Official Personnel File
• EOSH :Environmental and Occupational Safety & Health
• EOSH :Environmental Compliance Occupational Safety and Health
• EPA :Environmental Protection Agency
• EPI :Element Performance Inspection
• EPS :Engineered Performance Standards
• EPSS :Enhanced Packet Switched Service
• ERAD :En Route Broadband Radar
• ERAM :En Route Automation Modernization
• ERIDS :En Route Information Display System
• ERIT :Enhanced Radar Intelligent Tool
• ERM :En Route Spacing Program
• ERMS :Environmental Remote Monitoring System
• ES&H :Environmental Safety and Health
• ESA :Eastern Service Area
• ESC :Eastern Service Center
• ESC :Enterprise Service Center
• ESC :Eastern Service Center
• ESEC :En Route Broadband Secondary Radar
• ESF :Extended Superframe Format
• ESIS :Enhanced Status Information System
• ESIS :Environmental Safety Information System
• ESP :En Route Spacing Program
• ESP :En Route Sequencing Program
• ESRI :Environmental Systems Research Institute
• ESYS :En Route Equipment Systems
• ETA :Estimated Time of Arrival
• ETE :Estimated Time En Route
• ETG :Enhanced Target Generator
• ETMS :Enhanced Traffic management Systems
• ETN :Electronic Telecommunications Network
• ETO :Engineering Technical Officer
• ETVCT :En Route Training Voice Communication Tool
• ETVS :Enhanced Terminal Voice Switch
• EUROCAE :European Organization for Civil Aviation Equipment
• EVAS :Enhanced Vortex Advisory System
• EVCS :Emergency Voice Communications System
• EVFR :Electronic Visual Flight Rules
• EVM :Earned Value Management

F

• F&E :Facilities and Equipment
• FAA :Federal Aviation Administration
• FAAAC :FAA Aeronautical Center
• FAACIS :FAA Communications Information System
• FAASTeam :FAA Safety Team
• FAATC :FAA Technical Center
• FAATC :Federal Aviation Administration Technical Center
• FAATSAT :FAA Telecommunications Satellite
• FAATSAT :Federal Aviation Administration Telecommunications Satellite
• FAC :Facility
• FACUTL :Facility Utilization System
• FADE :FAA/Airline Data Exchange
• FAF :Final Approach Fix
• FAIRS :Federal Aircraft Management Information System
• FAMIS :Federal Air Marshal Information System
• FANS :Future Air Navigation System
• FAP :Final Approach Point
• FAPM :FTS2000 Associate Program Manager
• FAQ :Frequently Asked Questions
• FAR :Federal Aviation Regulation
• FARM :Fielded Automation Requirements Management
• FASC :FAA Aviation Safety Center
• 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
• FCM :Flight Schedule Monitor
• FCOM :FSS Radio Voice Communications
• FCPU :Facility Central Processing Unit
• FCT :Federal Contract Tower
• FDAT :Flight Data
• 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
• FDMSAW :Fully Digital Minimum Safe Altitude Warning
• FDP :Flight Data Processing
• FDP/RDP :Flight Data Processing/Radar Data Processing
• FDR :Federal Data Registry
• FDT :Flight Deck Training Program
• FED :Federal
• FEIS :Final Environmental Impact Statement
• FEODP :Flight Edit and On-Demand Printing
• FEP :Front End Processor
• FERS :Facility and Equipment Reporting System
• FFAC :From Facility
• FFLA :Flexible Flight Level Assignment
• FFRDC :Federal Funded Research & Development Center
• FIAO :Flight Inspection Area Office
• FICO :Flight Inspection Central Office
• FIFO :Flight Inspection Field Office
• FIG :Flight Inspection Group
• FINO :Flight Inspection National Field Office
• FIO :Flight Inspection Office
• FIP :Facility Improvement Program
• FIPS :Federal Information Publication Standard
• FIR :Flight Information Region
• FIRE :Fire Station
• FIRMR :Federal Information Resource Management Regulation
• FIRPS :Flight Inspection Reports Processing System
• FIS :Flight Information Services
• FISDL :Flight Information Services Data Link
• FISMA :Federal Information Security Management Act of 2002
• FISMA :Federal Information Security Management Act of 2002
• FITS :FAA/Industry Training Standards
• FL :Flight Level
• FLDS :Flight Loads Data System
• FLIP :Flight Information Publication
• FLM :Front Line Manager
• FLOWSIM :Traffic Flow Planning Simulation
• FLSA :Fair Labor Standards Act
• FLTCK :Flight Check
• FMA :Final Monitor Aid
• FMC :Frontline Managers Courses
• FMF :Facility Master File
• FMIS :FTS2000 Management Information System
• FMO :Facility Management Office
• FMP :Field Maintenance Party
• FMS :Financial Management System
• FMS :Flight Management System
• FNMS :FTS2000 Network Management System
• FOD :Foreign Object Damage
• FOIA :Freedom of Information Act
• FOMS :Flight Operations Management System
• FONSI :Finding of No Significant Impact
• FOQA :Flight Operations Quality Assurance
• FOTS :Fiber Optics Transmission System
• FOUO :For Official Use Only
• FP :Flight Plan
• FPI :Fluorescent Penetrate Inspection
• FPL :Full Performance Level
• FPO :Flight Procedures Office
• FPPS :Federal Personnel Payroll System
• FPS :Military Primary Radar
• FRC :Request Full Route Clearance
• FRD :Facility Reference Data
• FRMS :Facility Roster Management System
• FS :Flight Standards
• FSAS :Flight Service Automation System
• FSCAP :Flight Safety Critical Aircraft Parts
• FSDO :Flight Standards District Office
• FSDPS :Flight Service Data Processing System
• FSEP :Facility, Service, and Equipment Profile
• FSFO :Flight Standards Field Office
• FSIAG :Flight Service Information Area Group
• FSM :Flight Schedule Monitor
• FSP :Flight Strip Printer
• FSPD :Freeze Speed Parameter
• FSRM :Facility Security Risk Management
• FSS :Flight Service Station
• FSSA :Flight Service Station Automated Service
• FST :Fuel Storage Tanks
• FSTS :Federal Secure Telephone Service
• FSYS :Flight Service Station Equipment Systems
• FTE :Full Time Equivalent
• FTI :FAA Telecommunications Infrastructure
• FTP :File Transfer Protocol
• FTS :Federal Telecommunications System
• FTS2000 :Federal Telecommunications System 2000
• FUS :Functional Units or Systems
• FWCS :Flight Watch Control Station
• FWS :FAA Weather Service
• FY :Fiscal Year

G

• GA :General Aviation
• GAA :General Aviation Activity
• GAAA :General Aviation Activity and Avionics
• GADO :General Aviation District Office
• GAO :Government Accountability Office
• GAO :Government Accounting Office
• GCA :Ground Control Approach
• GDE :Ground Delay Enhancements
• GDP :Ground Delay Program
• GENOT :General Notice
• GETS :Government Emergency Telecommunications Service
• GETS :Grievance Electronic Tracking System
• GFE :Government Furnished Equipment
• GFM :Government Furnished Materials
• GFP :Government Furnished Property
• GIS :Geographic Information System
• GLONASS :Global Orbiting Navigational Satellite System
• GMCC :General National Airspace System Maintenance Control Center
• GML :Geography Markup Language
• GMS :Grants Management System
• GNAS :General National Airspace System
• GNSS :Global Navigation Satellite System
• GOES :Geostationary Operational Environmental Satellite
• GOESF :GOES Feed Point
• GOEST :GOES Terminal Equipment
• GOMP :Gulf of Mexico Program
• GPO :Government Printing Office
• GPRA :Government Performance and Results Act
• GPS :Global Positioning Satellite
• GPS :Global Positioning System
• GPWS :Ground Proximity Warning System
• GRADE :Graphical Airspace Design Environment
• GS :Glide Slope
• GS :Glide Slope Indicator
• GSA :General Services Administration
• GSE :Ground Support Equipment
• GTM :General Terrain Model
• GUI :Graphic User Interface
• GWDS :Graphic Weather Display System

H

• HAA :Height Above Airport
• HAL :Height Above Landing
• HARS :High Altitude Route System
• HAT :Height Above Touchdown
• HAZMAT :Hazardous Materials
• HCAP :High Capacity Carriers
• HCS :Host Computer System
• HDME :NDB with Distance Measuring Equipment
• HDQ :FAA Headquarters
• HDR :Hardware Discrepancy Report
• HELI :Heliport
• HEMS :Helicopter Emergency Medical Service
• HF :High Frequency
• HI-EFAS :High Altitude EFAS
• HID :Host Interface Display
• HID/NAS/LAN :Host Interface Device/National Airspace System/Local Area Network
• HIRL :High Intensity Runway Lights
• HLDC :High Level Data Link Control
• HMI :Hazardously Misleading Information
• HOV :High Occupancy Vehicle
• HQ :FAA Headquarters
• HSI :Horizontal Situation Indicators
• HSPD :Homeland Security Presidential Directive
• HUD :Heads Up Display
• HUD :Housing and Urban Development
• HUMS :Health & Usage Monitoring Systems
• HVAC :Heating, Ventilating, and Air Conditioning
• HWAS :Hazardous In-Flight Weather Advisory
• Hz :Hertz

I

• I&I :Impact and Implementation
• I/AFSS :International AFSS
• IA :Indirect Access
• IA :Information Assurance
• IAF :Initial Approach Fix
• IAP :Instrument Approach Procedures
• IAPA :Instrument Approach Procedures Automation
• IAR :Investment Analysis Report
• IAS :Investment Analysis Staff
• IAT :Investment Analysis Team
• IATA :International Air Transport Association
• IBM :International Business Machines
• IBP :International Boundary Point
• IBR :Intermediate Bit Rate
• IC :Implementation Center
• ICAO :International Civil Aviation Organization
• iCMM :integrated Capability Maturity Model
• ICMS :Integrated Control and Monitor System
• ICSS :Integrated Communications Switching System
• ICSS :International Communications Switching Systems
• ID :Identification
• IDAT :Interfacility Data
• IDP :Individual Development Plan
• IDS :Intrusion Detection System
• IF :Intermediate Fix
• IFB :Invitation For Bid
• IFCP :Interfacility Communications Processor
• IFDS :Interfacility Data System
• IFEA :In-Flight Emergency Assistance
• IFO :International Field Office
• IFP :Instrument Flight Procedures
• IFPA :Instrument Flight Procedures Automation Program
• IFR :Instrument Flight Rules
• IFSS :International Flight Service Station
• IG :Inspector General
• IGIA :Interagency Group on International Aviation
• IIE :Integrated Information Environment
• ILM :Inventory Logistics and Maintenance Suite
• ILS :Instrument Landing System
• ILSP :Integrated Logistics Support Plan
• IM :Inner Marker
• IMC :Instrument Meteorological Conditions
• INM :Integrated Noise Model
• INS :Inertial Navigation System
• IOC :Initial Operating Capability
• IOC :Initial Operating Condition
• IOT&E :Independent Operational Test and Evaluation
• IP :Internet Protocol
• IPDS :Instrument Procedure Development System
• IPMS :IT Program Management System
• IPR :In Process Review
• IPT :Integrated Product Team
• iRCAS :Intranet Radio Coverage Analysis System
• IRD :Initial Requirements Document
• IRM :Information Resource Management
• IRMC :Integrated Risk Management Checklist
• IRMP :Information Resources Management Plan
• ISBP :Information Security Business Portal
• ISC :Initial System Capability
• ISDN :Integrated Services Digital Network
• ISMLS :Interim Standard Microwave Landing System
• ISO :Information System Owner
• ISS :Information Systems Security
• ISSCA :Information Systems Security Certification Agent
• ISSM :Information Systems Security Manager
• ISSO :Information Systems Security Officer
• IST :InterService Team
• IT :Information Technology
• ITC :In-Trail Climb
• ITD :In-Trail Descent
• ITEB :Information Technology Executive Board
• ITI :Interactive Terminal Interface
• ITIL :Information Technology Infrastructure Library
• ITMRA :Information Technology Management Reform Act
• ITSM :Information Technology Service Management
• ITWS :Integrated Terminal Weather System
• IVRS :Interim Voice Response System
• IVSR :Interim Voice Switch Replacement Program
• IVT :Interactive Video Teletraining
• IW :Inside Wiring
• IWGDS :Interim Weather Graphic-Display System

J

• J2EE :Java 2 Enterprise Edition
• JAI :Joint Acceptance Inspection
• JCN :Job Control Number
• JPDO :Joint Planning and Development Office
• JRC :Joint Resources Council
• JSS :Joint Surveillance System

K

• Kbps :Kilobits Per Second
• KCAS :Knots Calibrated Airspeed
• kHz :Kilohertz
• KIAS :Knots Indicated Airspeed
• KSN :Knowledge Services Network
• KVDT :Keyboard Video Display Terminal

L

• LAA :Local Airport Advisory
• LAAS :Local Area Augmentation System
• LAAS :Low Altitude Alert System
• LABS :Leased A B Service
• LABS :Los Angeles Basin Study
• LABSC :LABS GS-200 Computer
• LABSR :LABS Remote Equipment
• LABSW :LABS Switch System
• LAC :Logical Access Control
• LAGPS :Local Area Global Positioning System
• LAHSO :Land and Hold Short Operation
• LAN :Local Area Network
• LATA :Local Access and Transport Area
• LAWRS :Limited Aviation Weather Reporting Service
• LAWRS :Limited Aviation Weather Reporting System
• LBR :LAN Based Random Access Plan Position Indicator
• LBR :LAN Based Random Access Plan Position Indicator
• LCC :Life Cycle Cost
• LCF :Local Control Facility
• LCGS :Low Cost Ground Surveillance Radar
• LCN :Local Communications Network
• LDA :Landing Directional Aid
• LDA :Localizer Directional Aid
• LDAP :Lightweight Directory Access Protocol
• LDIN :Lead-In Lights
• LDR :Labor Distribution Reporting
• LEC :Local Exchange Carrier
• LF :Low Frequency
• LFDS :Large Facility Demarcation System
• LFME :Local Flow Management Enhancements
• LINCS :Leased Interfacility NAS Communications System
• LIRL :Low Intensity Runway Lights
• LIS :Logistics and Inventory System
• LLWAS :Low Level Wind Shear Alert System
• LM/MS :Low/Medium Frequency
• LMM :Locator Middle Marker
• LMS :Logistics Management Specialist
• LMS :LORAN Monitor Site
• LOA :Letter of Agreement
• LOB :Line Of Business
• LOC :Localizer
• LOCID :Location Identifier
• LOI :Letter of Intent
• LOM :Compass Locator at Outer Marker
• LOM :Locator Outer Marker
• LORAN :Long-Range Aid to Navigation
• LOV :List of Values
• LPC :Logistics Program Coordinator
• LPV :Lateral Precision Performance with Vertical Guidance
• LPV :Localizer Performance with Vertical Guidance
• LRCO :Limited Remote Communications Outlet
• LRNAV :Long Range Navigation
• LRR :Long Range Radar
• LRRAP :Long Range Resource Allocation Plan
• LSMS :Line Station Maintenance Section

M

• M1FC :Model 1 Full Capacity
• MAA :Maximum Authorized Altitude
• MAC :Maintenance Action Code
• MAC :Mean Aerodynamic Cord
• MALS :Medium-Intensity Approach Lighting System
• MALSF :Medium-Intensuty Approach Light System with Sequenced Flashers
• MALSR :MALS with Runway Alignment Indicator Lights
• MALSR :Medium-Intensity Approach Lighting System With Runway Alignment Indicator
• MAM :Maintenance Assumed Monitoring
• MAP :Maintenance Automation Program
• MAP :Military Airport Program
• MAP :Missed Approach Point
• MAP :Missed Approach Procedure
• MAP :Modified Access Pricing
• MARSA :Military Assumes Responsibility for Separation
• MASS :Maintenance Automation System Software
• MBO :Management by Objectives
• Mbps :Megabits Per Second
• MBT :Maneuvers Based Training
• MCA :Minimum Crossing Altitude
• MCAS :Marine Corps Air Station
• MCC :Maintenance Control Center
• MCI :Mode C Intruder
• MCK :Maintenance Check
• MCL :Middle Compass Locater
• MCS :Maintenance and Control System
• MDA :Minimum Descent Altitude
• MDCRS :Metereological Data Collection and Reporting System
• MDFM :Material Delivery Forecast Module
• MDT :Maintenance Data Terminal
• MEA :Minimum Enroute Altitude
• MEARTS :Micro-EARTS
• MEL :Minimum Equipment List
• METAR :Aviation Routine Weather Report
• METI :Meteorological Information
• MF :Middle Frequency
• MFJ :Modified Final Judgment
• MFO :Medical Field Office
• MFT :Meter Fix Crossing Time/Slot Time
• MHA :Minimum Holding Altitude
• MHz :Megahertz
• MIA :Minimum IFR Altitudes
• MIDO :Manufacturing Inspection District Office
• MIO :Manufacturing Inspection Office
• MIRL :Medium Intensity Runway Lights
• MIS :Management Information System
• MIS :Meteorological Impact Statement
• MISC :Miscellaneous
• MISO :Manufacturing Inspection Satellite Office
• MIT :Miles In Trail
• MLS :Microwave Landing System
• MM :Middle Marker
• MMAC :Mike Monroney Aeronautical Center
• MMC :Maintenance Monitoring Console
• MMPI :Minnesota Multiphase Personality Inventory
• MMR :Multi-Mode Receiver
• MMS :Maintenance Monitoring System
• MNPS :Minimum Navigation Performance Specification
• MNPSA :Minimum Navigation Performance Specifications Airspace
• MNS :Mission Needs Statement
• MOA :Memorandum of Agreement
• MOA :Military Operations Area
• MOC :Memorandum of Cooperation
• MOCA :Minimum Obstruction Clearance Altitude
• MOCC :Mid-States Operations Control Center
• MOD :Memorandum of Decision
• MODE C :Altitude Reporting Mode of Secondary Radar
• MODE S :Mode Select; Discrete Addressable Secondary Radar System With Data Link
• MODEM :Modulator-Demodulator
• MOS :Military Operations Specialst
• MOU :Memorandum of Understanding
• MPAR :Multi-function Phased Array Radar
• MPO :Metropolitan Planning Organization
• MPS :Maintenance Processor Subsystem (OR) Master Plan Supplement
• MRA :Minimum Reception Altitude
• MRC :Monthly Recurring Charge
• MRM :Maintenance Returned Monitoring
• MSA :Minimum Safe Altitude
• MSAW :Minimum Safe Altitude Warning
• MSD :Multi-Site Damage
• MSDA :Material Safety Data Sheet
• MSDS :Microsoft Data Engine
• MSL :Mean Sea Level
• MSN :Message Switching Network
• MSR :Monthly Status Report
• MTCS :Modular Terminal Communications System
• MTD :Moving Target Detection
• MTI :Moving Target Indicator
• MTR :Military Training Route
• MUX :Multiplexor
• MVA :Minimum Vectoring Altitude
• MVFR :Marginal Visual Flight Rules
• MWP :Meteorological Weather Processor

N

• N/A :Not Applicable
• NAAQS :National Ambient Air Quality Standards
• NACG :National Aeronautical Charting Group
• NADA :NADIN Concentrator
• NADIN :National Airspace Data Interchange Network
• NADSW :NADIN Switches
• NAILS :National Airspace Integrated Logistics Support
• NAMS :NADIN IA
• NAP :Needs Assessment Program
• NAPM :National Associate Program Manager
• NAPRS :National Airspace Performance Reporting System
• NAR :National Airspace Review 66
• NARACS :National Radio Communications System
• NARP :National Aviation Research Plan
• NAS :National Air Space
• NAS :National Airspace System
• NAS :National Airspace System or Naval Air Station
• NASDC :National Aviation Safety Data
• NASE :NAS Adaptation Services Environment
• NASP :National Airspace System Plan
• NASPAC :National Airspace System Performance Analysis Capability
• NASR :National Airspace System Resources
• NASTEP :National Airspace System Technical Evaluation Program
• NATCA :National Air Traffic Control Association
• NATCA :National Air Traffic Controllers Association
• NATCO :National Communications Switching Center
• NATS :National Air Traffic Service
• NAVAID :Navigation Aid
• NAVAIDS :Navigational Aids
• NAVMN :Navigation Monitor and Control
• NAWAU :National Aviation Weather Advisory Unit
• NAWPF :National Aviation Weather Processing Facility
• NBAA :National Business Aircraft Association
• NBCAP :National Beacon Code Allocation Plan
• NBCFAE :National Black Coalition of Federal Aviation Employees
• NCAR :National Center for Atmospheric Research; Boulder, CO
• NCF :National Control Facility
• NCIU :NEXRAD Communications Interface Unit
• NCP :NAS Change Proposal
• NCP :Noise Compatibility Program
• NCS :National Communications System
• NSD :Navigation System Database
• NDB :Non-directional Beacon
• NDC :National Data Center
• NDI :Nondestructive Inspection
• NDNB :NADIN II
• NDP :National Airspace System Defense Programs
• NEC :National Electric Code
• NED :National Elevation Data
• NEM :Noise Exposure Map
• NEMC :Network Enterprise Maintenance Center
• NEPA :National Environmental Policy Act
• NEXRAD :Next Generation Weather Radar
• NextGen :Next Generation Air Transportation System
• NFAX :National Facsimile Service
• NFD :National Flight Database
• NFDC :National Flight Data Center
• NFDD :National Flight Data Digest
• NFIS :NAS Facilities Information System
• NFP :NIMS Premier Facility
• NGA :National Geospatial-Intelligence Agency
• NHCFAE :National Hispanic Coalition of Federal Aviation Employees
• NI :Network Interface
• NICS :National Airspace System Interfacility Communications System
• NICS :National Interfacility Communications System
• NIMA :National Imagery and Mapping Agency
• NIMS :NAS Infrastructure Management System
• NIPT :National Infrastructure Planning Team
• NISC :NAS Implementation Support Contract
• NISC :NAS Integration Support Contractor
• NIST :National Institute of Standards and Technologies
• 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
• NOCC :National Operation Control Center
• NOG :National Operations Group
• NOM :NAS Operations Manager
• NOREP :National Oceanic Review and Enhancement Program
• NOTAM :Notice to Airmen
• NPDES :National Pollutant Discharge Elimination System
• NPE :Non-primary Airport Entitlement
• NPIAS :National Plan for Integrated Airport Systems
• NPM :NAS Program Manager/Management
• NPR :National Performance Review
• NPRM :Notice of Proposed Rulemaking
• NRC :Non-Recurring Charge
• NRCS :National Radio Communications Systems
• NRP :National Route Program
• NSAP :National Service Assurance Plan
• NSC :National Service Center
• NSP :National Simulator Program
• NSRCATN :National Strategy to Reduce Congestion on America's Transportation Network
• NSSFC :National Severe Storms Forecast Center
• NSSL :National Severe Storms Laboratory; Norman, OK
• NSWRH :NWS Regional Headquarters
• NTAP :Notices To Airmen Publication
• NTP :National Transportation Policy
• NTP :Notice to Proceed
• NTS :NOTAM Tracking System
• NTSB :National Transportation Safety Board
• NTZ :No Transgression Zone
• NWP :National Work Plan
• NWP :NextGen Weather Processor
• NWS :National Weather Service
• NWSR :NWS Weather Excluding NXRD
• NXRD :Advanced Weather Radar System

O

• O&M :Operations and Maintenance
• O21 :Ocean21
• OAG :Official Airline Guide
• OALT :Operational Acceptable Level of Traffic
• OAMP :Off-Line Aircraft Management Program
• OAP :Oceanic Automation Program
• OAS :Oceanic Automation System
• OASIS :Operational and Supportability Implementation System
• OATS :Office Automation Technology Services
• OAW :Off-airway Weather Station
• OC4J :Oracle Containers for Java Enterprise Edition
• OCA :Oceanic Control Area
• OCC :Operations Control Center
• OCDB :Oracle Content Database
• ODAL :Omnidirectional Approach Lighting System
• ODALS :Omnidirectional Approach Lighting Systems
• ODAPS :Oceanic Display and Planning System
• ODAPS :Oceanic Display and Processing Station
• ODL :Oceanic Data Link
• ODRA :Office of Dispute Resolution for Acquisition
• ODS :Operational Data Store
• OE :Obstacle Evaluation
• OE/AAA :Obstruction Evaluation/Airport Airspace Analysis
• OEM :Original Equipment Manufacturer
• OEP :Operational Evolution Plan
• OEP :Operational Evolution Plan / Partnership
• OETS :Obstacle Evaluation Tracking System
• OFA :Object Free Area
• OFDPS :Offshore Flight Data Processing System
• OFT :Outer Fix Time
• OFZ :Obstacle Free Zone
• OGC :Open Geospatial Consortium
• OIG :Office of the Inspector General
• OM :Outer Marker
• OMB :Office of Management and Budget
• OMEGA :Very Low Radio Navigation System
• OMIC :Operations Manager in Charge
• ONER :Oceanic Navigational Error Report
• OPD :Optimum Profile Descent
• OPI :Office of Primary Interest
• OPLT :Operational Acceptable Level of Traffic
• OPR :Office of Primary Responsibility
• OPS :AF Operations
• OPS :Operations
• OPSNET :Operations Network
• OPSW :Operational Switch
• OPX :Off Premises Exchange
• ORD :Operational Readiness Demonstration
• ORD :Operational Readiness Demonstration - Milestone
• ORS :Obstruction Repository System
• OS :Operating System
• OS :Operational Shakedown & Cutover
• OSA :Operational Safety Assessment
• OSD :Operational Suitability Demonstration
• OSDS :Oceanic System Development and Support
• OSHA :Occupational Safety and Health Administration
• OSIP :Office Safety Inspection Program
• OSRWG :Oceanic Separation Reduction Working Group
• OST :Office of the Secretary of Transportation
• OT&E :Operational Test and Evaluation
• OTFO :Operations Technical Field Office
• OTPS :Oceanic Traffic Planning System
• OTR :Oceanic Transition Route
• OTS :Organized Track System
• OTS :Out of Service

P

• P2R2 :Preferred Route Reduction Program
• PA :Project Authorization
• PABX :Private Automated Branch Exchange
• PAD :Packet Assembler/Disassembler
• PAM :Peripheral Adapter Module
• PAMRI :Peripheral Adapter Module Replacement Item
• PANS :Procedures for Air Navigation Services
• PAPI :Precision Approach Path Indicator
• PAR :Precision Approach Radar
• PAR :Preferential Arrival Route
• PAS :Project Assignment Sheet
• PASS :Professional Airway System Specialists
• PATS :Precision Approach Tracking System
• PATWAS :Pilots Automatic Telephone Weather Answering Service
• PBCT :Proposed Boundary Crossing Time
• PBRF :Pilot Briefing
• PBX :Private Branch Exchange
• PCA :Positive Control Airspace
• PCB :Personnel Compensation and Benefits
• PCB&T :Personnel Compensation Benefits and Travel
• PCM :Pulse Code Modulation
• PCN :Project Control Number
• PCPS :Purchase Card Processing System
• PCS :Permanent Change of Station
• PCS :Power Conditioning System
• PCS :Production Control System
• PDA :Personal Digital Assistant
• PDAR :Preferential Arrival And Departure Route
• PDC :Pre-Departure Clearance
• PDC :Program Designator Code
• PDF :Portable Document Format
• PDN :Public Data Network
• PDR :Preferential Departure Route
• PDS :Proficiency Development Specialists
• PED :Personal Electronic Devices
• PFAST :Passive Final Approach Spacing Tool
• PFC :Passenger Facility Charge
• PFC :Porous Friction Course
• PgMM :Program Management Methodology
• PGP :Planning Grant Program
• PHA :Preliminary Hazard Analysis
• PHL :Preliminary Hazard List
• PIC :Principal Interexchange Carrier
• PIDP :Programmable Indicator Data Processor
• PII :Personally Identifiable Information
• PIM :Program Implementation Manager
• PIP :Primary Interface Processor
• PIP :Program Implementation Plan
• PIREP :Pilot Weather Report
• PjMM :Project Management Methodology
• PjSA :Project Scope Agreement
• PKI :Public Key Infrastructure
• PM :Preventive Maintenance
• PMA :Parts Manufacturer Approval
• PMC :Project Materials Cumulative
• PML :Project Material List
• PMS :Program Management System
• POC :Point-of-Contact
• POCC :Pacific Operations Control Center
• POP :Point-0f-Presence
• POT :Point-of-Termination
• PPE :Personal Protective Equipment
• PPIMS :Personal Property Information Management System
• PPR :Personal Property Report
• PR :Procurement Request
• PR :Project Review / Program Review
• PRI :Primary Rate Interface
• PRM :Precision Runway Monitor
• PSC :Program Support Center
• PSD :Process Support Document
• PSDN :Public Switched Data Network
• PSL :Projected Service Life
• PSN :Packet Switched Network
• PSR :Project Status Report
• PSS :Packet Switched Service
• PSTN :Public Switched Telephone Network
• PT :Product Team
• PTC :Presumed-to-Conform
• PTR :Program Technical/Trouble Report
• PTS :Procedures Tracking System
• PUB :Publication
• PUP :Principal User Processor
• PVC :Permanent Virtual Circuit
• PVD :Plan View Display
• PWI :Proximity Warning Indicator

Q

• QA :Quality Assurance
• QAE :Quality Assurance Evaluator
• QAR :Quality Assurance Resource
• QC :Quality Control
• QMS :Quality Management System

R

• R&D :Research and Development
• R,E&D :Research, Engineering and Development
• RADLO :Regional Air Defense Liaison Office
• RAIL :Runway Alignment Indicator Lights
• RAPCO :Radar Approach Control (USAF)
• RAPCON :Radar Approach Control
• RAPCON :Radar Approach Control (FAA)
• RAPPI :Random Access Plan Position Indicator
• RASP :Regional Airport System Plan
• RAT :Risk Assessment Team
• RATCC :Radar Air Traffic Control Center
• RATCF :Radar Air Traffic Control Facility (USN)
• RBC :Rotating Beam Ceilometer
• RBDPE :Radar Beacon Data Processing Equipment
• RBPM :Remote Beacon Performance Monitor
• RBSS :Radar Bomb Scoring Squadron
• RCAG :Remote Communications Air/Ground
• RCAS :Radio Coverage Analysis System
• RCC :Rescue Coordination Center
• RCCC :Regional Communications Control Center
• RCE :Radio Control Equipment
• RCF :Remote Communications Facility
• RCIU :Remote Control Interface Unit
• RCL :Radio Communications Link
• RCLR :Radio Communications Link Repeater
• RCLR :RCL Repeater
• RCLT :RCL Terminal
• RCM :Reliability Centered Maintenance
• RCO :Remote Communications Outlet
• RCU :Remote Control Unit
• RD :Requirements Document
• RDP :Radar Data Processing
• RDSIM :Runway Delay Simulation Model
• RDVS :Rapid Deployment Voice Switch
• RE :Resident Engineer
• REDAC :Research, Engineering & Development Advisory Committee
• REDMACS :Research, Engineering, and Development Monitoring, Analysis and Control System
• REGIS :Regional Information System
• REIL :Runway End Identification Light
• RF :Radio Frequency
• RFI :Radio Frequency Interference
• RFI :Request for Information
• RFI :Return on Future Investment
• RFQ :Request for Quotes
• RIIEP :Runway Incursion Information Evaluation Program
• RIP :Runway Incursion Program
• RM :Risk Management
• RMCC :Remote Monitor Control Center
• RMCF :Remote Monitor Control Facility
• RML :Radar Microwave Link
• RMLR :RML Repeater
• RMLS :Remote Monitoring and Logging System
• RMLT :RML Terminal
• RMM :Remote Maintenance Monitoring
• RMMC :Remote Maintenance Monitoring and Control
• RMMS :Remote Maintenance Monitoring System
• RMMS :Remote Maintenance Monitoring Systems
• RMS :Remote Maintenance Subsystem
• RMS :Remote Monitoring Subsystem
• RMS :Risk Management System
• RMSC :Remote Monitoring Subsystem Concentrator
• RMT :Resource Management Tool
• RMT :Risk Management Team
• RNAV :Area Navigation
• RNP :Required Navigation Performance
• RNP-10 :Required Navigation Performance
• ROA :Record of Assistance
• ROC :Regional Operations Center
• ROD :Record of Decision
• ROM :Read-Only Memory
• ROSA :Report of Service Activity
• ROSHM :Regional Occupational Safety and Health Manager
• ROT :Runway Occupancy Time
• RP :Restoration Priority
• RPC :Restoration Priority Code
• RPG :Radar Processing Group
• RPI :Real Property Inventory
• RPM :Rational Portfolio Manager
• RPM :RTP Program Manager
• RPMES :Regional Program Manager for Environment and Safety
• RPOC :Risk Point-of-Contact
• RPR :Real Property Report
• RPV :Remotely Piloted Vehicle
• RPZ :Runway Protection Zone
• RRCS :Remote Radio Control System
• RRH :Remote Reading Hygrothermometer
• RRHS :Remote Reading Hydrometer
• RRWDS :Remote Radar Weather Display
• RRWSS :RWDS Sensor Site
• RSA :Runway Safety Area
• RSAP :Runway Safety Action Plan
• RSAT :Runway Safety Action Team
• RSL :Runway Status Light
• RSS :Remote Speaking System
• RT :Remote Transmitter
• RT&BTL :Radar Tracking and Beacon Tracking Level
• RTAD :Remote Tower Alphanumeric Display
• RTCA :Radio Technical Commission for Aeronautics
• RTDS :Radar Terminal Display System
• RTE :Route
• RTP :Regional Transportation Plan
• RTR :Remote Transmitter/Receiver
• RTRD :Remote Tower Radar Display
• RTS :Return to Service
• RUC :Rapid Update Cycle
• RVM :Radar Video Map
• RVR :Runway Visual Range
• RVSM :Reduced Vertical Separation Minima
• RW :Runway
• RWP :Real-time Weather Processor
• RWSL :Runway Status Lights
• RWY :Runway
• RX :Receiver

S

• S/S :Sector Suite
• SA :System Administrator
• SAC :Strategic Air Command
• SAFI :Semi Automatic Flight Inspection
• SAGA :System Safety Approach for General Aviation
• SAI :Safety Attribute Inspection
• SALS :Short Approach Lighting System
• SAMS :Special Use Airspace Management System
• SAN :Storage Area Network
• SAPS :Staffing and Personnel System
• SAR :Search and Rescue
• SARP :Standards and Recommended Practices
• SAS :Safety Assurance System
• SASO :System Approach for Safety Oversight
• SAT :Security, Awareness, and Training System
• SAT :SEOAT Analytical Team
• SATCOM :Satellite Communications
• SAVES :Strategic Sourcing for the Acquisition of Various Equipment and Supplies
• SAWRS :Supplemental Aviation Weather Reporting Service
• SAWRS :Supplementary Aviation Weather Reporting System
• SBGP :State Block Grant Program
• SBIR :Small Business Innovation Research
• SBS :Surveillance Broadcast Services
• SBT :Scenario Based Training
• SCADA :Supervisory Control and Data Acquisition
• SCAP :System Certification and Accreditation Package
• SCAT :Staffing and Cost Analysis Tool
• SCC :System Command Center
• SCT :Southern California Area TRACON (Metroplex)
• SCVTS :Switched Compressed Video Telecommunications Service
• SDF :Simplified Direction Finding
• SDF :Software Defined Network
• SDIS :Switched Digital Integrated Service
• SDLC :Software Development Life Cycle
• SDP :Service Delivery Point
• SDR :Service Difficulty Report
• SDR :System Documentation Release
• SDS :Switched Data Service
• SEC :Strategic Event Coordination
• SECM :Safety and Environmental Compliance Manager
• SECRA :Secondary Radar
• SEL :Single Event Level
• SELF :Simplified Short Approach Lighting System With Sequenced Flashing Lights
• SEOAT :Systems Engineering Operational Analysis Team
• SERC :Software Engineering Resource Center
• SET :Spacing Efficiency Tool
• SETA :System Engineering and Technical Assistance
• SFAR :Special Federal Aviation Regulations
• SFAR-38 :Special Federal Aviation Regulation 38
• SFD :Service Flow Diagram
• SGI :Silicon Graphics Incorporated
• SHPO :State Historic Preservation Officer
• SHRP :Strategic Highway Research Program
• SIAP :Standard Instrument Flight Procedure
• SIC :Service Initiation Charge
• SID :Standard Instrument Departure
• SID :Station Identifier
• SIGMET :Significant Meteorological Information
• SIMMOD :Airspace and Airport Simulation Model
• SIP :State Implementation Plan
• SIR :Screening Information Request
• SLEP :Service Life Extension Program
• SM :Statute Mile
• SMA :Surface Monitor Aid
• SMA :Surface Movement Advisor
• SMF :Systems Management Facility
• SMGC :Surface Movement Guidance and Control
• SMGCS :Surface Movement Guidance and Control System
• SMMC :System Maintenance Monitor Console
• SMO :System Management Office
• SMPS :Sector Maintenance Processor Subsystem
• SMS :Safety Management System
• SMS :Simulation Modeling System
• SMT :Schedule Management Toolset
• SNR :Signal-to-Noise Ratio
• SNT :Staffed NextGen Tower
• SOAR :System of Airports Reporting
• SOC :Service Operations Center
• SOC :Service Oversight Center
• SOIR :Simultaneous Operations On Intersecting Runways
• SOIWR :Simultaneous Operations on Intersecting Wet Runways
• SOP :Standard Operating Practice
• SOP :Standard Operating Procedures
• SOW :Statement of Work
• SP :Surveillance Processing
• SPAS :System Performance Analysis System
• SPIFR :Single Pilot IFR
• SRAP :Sensor Receiver and Processor
• SRM :Safety Risk Management
• SRM :Single Pilot Resource Management
• SRMD :Safety Risk Management Document
• SRMDM :Safety Risk Management Memo
• SRS :Shuttle Reservation System
• SRTM :Shuttle Radar Topography Mission
• SSALF :SSALS with Sequenced Flashers
• SSALR :Simplified Short Approach Lighting System
• SSB :Single Side Band
• SSC :System Support Center
• SSC :Systems Support Center
• SSD :System Support Directive
• SSE :Servicing Security Element
• SSM :System Support Modification
• SSRWG :Systems Safety Risk Working Group
• SST :System Shakedown Testing
• ST&E :Security Test and Evaluation
• STAMP :Site Transition Activation Management Plan
• STAR :Standard Terminal Arrival Route
• STAR :Standard Terminal Arrivals
• STARS :Standard Terminal Automation Replacement System
• STC :Supplemental Type Certificate
• STD :Standard
• STMP :Special Traffic Management Program
• STMUX :Statistical Data Multiplexer
• STOL :Short Take - Off and Landing
• STOL :Short Takeoff and Landing
• STR :System Technical Release
• STT :Staffing to Traffic
• STVS :Small Tower Voice Switch
• SUA :Special Use Airspace
• SUP :Suspected Unapproved Parts
• SUPCOM :Supervisors Committee (AAT AND AAF)
• SUPPS :Supplementary Procedures
• SURPIC :Surface Picture
• SVCA :Service A
• SVCB :Service B
• SVCC :Service C
• SVCO :Service O
• SVFB :Interphone Service F (B)
• SVFC :Interphone Service F (C)
• SVFD :Interphone Service F (D)
• SVFO :Interphone Service F (A)
• SVFR :Special Visual Flight Rules
• SWAP :Severe Weather Avoidance Procedure/Program
• SWIFT :Selections Within Faster Times
• SWIM :System Wide Information Management
• SWPPP :Storm Water Pollution Protection Plan

T

• T1MUX :T1 Multiplexer
• TAAS :Terminal Advance Automation System
• TAC :Tactical Air Command (USAF) Tester
• TAC :Terminal Area Chart
• TACAN :Tactical Air Navigation
• TACAN :Tactical Aircraft Control and Navigation
• TACR :TACAN at VOR, TACAN only
• TAF :Terminal Area Forecast
• TAMR :Terminal Automation Modernization and Replacement
• TARS :Terminal Automated Radar Service
• TAS :True Air Speed
• TATCA :Terminal Air Traffic Control Automation
• TAVT :Terminal Airspace Visualization Tool
• TAWS :Terrain Awareness and Warning System
• TBFM :Time Based Flow Management
• TBO :Trajectory Based Operation
• TCA :Tactical Customer Advocate
• TCA :Terminal Control Area
• TCA :Traffic Control Airport or Tower Control Airport
• TCACCIS :Transportation Coordinator Automated Command and Control Information System
• TCAP :Traffic Count Automation Program
• 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
• TCVR :Transceiver
• TDDS :Terminal Data Display System
• TDLS :Tower Data-Link Services
• TDMUX :Time Division Data Multiplexer
• TDWR :Terminal Doppler Weather Radar
• TELCO :Telephone Company
• TELMS :Telecommunications Management System
• TERP :Terminal Instrument Procedure
• TFAC :To Facility
• TFDM :Tower Flight Data Manager
• TFM :Traffic Flow Management
• TFMS :Traffic Flow Management System
• TFR :Temporary Flight Restriction
• TH :Threshold
• TIB :Technical Instruction Book
• TIMS :Telecommunications Information Management System
• TIPH :Taxi Into Position and Hold
• TIPS :Terminal Information Processing System
• TL :Taxilane
• TM&O :Telecommunications Management and Operations
• TMA :Traffic Management Advisor
• TMC :Traffic Management Coordinator
• TMC :Travel Management Center
• TMC/MC :Traffic Management Coordinator/Military Coordinator
• TMCC :Terminal Information Processing System
• TMCC :Traffic Management Computer Complex
• TMF :Traffic Management Facility
• TMI :Traffic Management Initiative
• TML :Television Microwave Link
• TMLI :Television Microwave Link Indicator
• TMLR :Television Microwave Link Repeater
• TMLT :Television Microwave Link Terminal
• TMP :Traffic Management Processor
• TMS :Traffic Management System
• TMSPS :Traffic Management Specialists
• TMU :Traffic Management Unit
• TNAV :Terminal Navigational Aids
• TOCC :Technical Operations Control Center
• 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
• TP :Telecommunication Processor
• TP :Track Processing
• TPP :Terminal Procedures Publication
• TPR :Technical Performance Record
• TR :Telecommunications Request
• TRACAB :Terminal Radar Approach Control in Tower Cab
• TRACON :Terminal Radar Approach Control
• TRACON :Terminal Radar Approach Control Facility
• TRAD :Terminal Radar Service
• TRB :Transportation Research Board
• TRD :Technical Reference Data
• TRDR :Technical Reference Data Record
• TRNG :Training
• TS :Top Secret
• TSA :Taxiway Safety Area
• TSARTS :Terminal Stand-Alone Radar Training System
• TSARTS :Terminal Stand-Alone Radar Training System
• TSC :Technical Support Center
• TSD :Traffic Situation Display
• TSD :Traffic Situational Display
• TSEC :Terminal Secondary Radar Service
• TSO :Technical Standard Order
• TSP :Telecommunications Service Priority
• TSR :Telecommunications Service Request
• TSS :Tower Simulation System
• TSSC :Technical Support Services Contract
• TSYS :Terminal Equipment Systems
• TTMA :TRACON Traffic Management Advisor
• TTWG :Technical Transfer Working Group
• TTY :Teletype
• TUR :Time Utilization Report
• TVOR :Terminal VHF Omnidirectional Range
• TVSR :Terminal Voice Switch Replacement
• TW :Taxiway
• TWEB :Transcribed Weather Broadcast
• TWIP :Terminal Weather Information for Pilots
• TWR :Tower (non-controlled)
• TWY :Taxiway
• TX :Transmitter
• TY :Type (FAACIS)

U

• UAS :Uniform Accounting System
• UAS :Unmanned Aircraft Systems
• UAT :Universal Access Transceiver
• UBA :User Benefits Applications
• UBI :User Benefits Infrastructure
• UCR :Unsatisfactory Condition Report
• UFAS :Uniform Federal Accessibility Standard
• UHF :Ultra High Frequency
• UNIX :Uniplexed Information and Computing System
• UPR :User Preferred Route
• UPS :Uninterruptable Power Supply
• UPT :User Preferred Trajectory
• URA :Uniform Relocation Assistance and Real Property Acquisition Policies Act of 1970
• URET :User Request Evaluation Tool
• USAF :United States Air Force
• USC :United States Code
• USCG :United States Coast Guard
• USG :United States Government
• USNS :United States Notices to Airmen System
• USOAP :Universal Safety Oversight Audit Program
• USOC :Uniform Service Order Code
• UTC :Coordinated Universal Time (ZULU)

V

• VALE :Voluntary Airport Low Emission
• VALE :Voluntary Airport Low Emission Program
• VASI :Visual Approach Slope Indicator
• VBScript :Visual Basic Scripting Edition
• VDF :Very High Frequency Direction-Finding Station
• VDL :Very High Frequency Data Link
• VDME :VOR with Distance Measuring Equipment
• VEARS :VSCS Emergency Access Radio System
• VF :Voice Frequency
• VFR :Visual Flight Rules
• VGSI :Visual Guidance Slope Indicator
• VHF :Very High Frequency
• VLF :Very Low Frequency
• VLJ :Very Light Jet
• VMC :Visual Meteorological Conditions
• VMS :Virtual Memory System
• VNAV :Visual Navigational Aids
• VNTSC :Volpe National Transportation System Center
• VOIP :Voice Over Internet Protocol
• VON :Virtual On-net
• VOR :Very High Frequency Omnidirectional Range
• VOR/DME :Very High Frequency Omnidirectional Range Collocated with Distance Measuring Equipment
• VOR/DME :VHF Omnidirectional Range/Distance Measuring Equipment
• VORTAC :Very High Frequency Omnidirectional Range Collocated Tactical Air
• VORTAC :VOR collocated with TACAN
• VOT :VOR Test Facility
• V/PD :Vehicle/Pedestrian Deviation
• VRRP :Voice Recorder Replacement Program
• VRS :Voice Recording System
• VSBP :Voice Switch Bypass
• VSCS :Voice Switching and Control System
• VTA :Vertex Time of Arrival
• VTAC :VOR collocated with TACAN
• VTOL :Vertical Take-off and landing
• VTS :Voice Telecommunications System

W

• WAAS :Wide Area Augmentation System
• WADGPS :Wide Area Differential Global Positioning System
• WAN :Wide Area Network
• WARP :Weather and Radar Processor
• WASS :Wide Area Augmentation System - GPS
• WBS :Work Breakdown Structure
• WC :Work Center
• WCAM :Weather Camera
• WCIS :Workmen's Compensation Information System
• WCP :Weather Communications Processor
• WECO :Western Electric Company
• WESCOM :Western Electric Satellite Communications
• WFD :Widespread Fatigue Damage
• WG :Working Group
• WiFi :Wireless Fidelity
• WJHTC :William J. Hughes Technical Center
• WMS :Web Map Service
• WMS :Wide-area Master Station
• WMSC :Weather Message Switching Center
• WMSCR :Weather Message Switching Center Replacement
• WOCC :Washington Operations Center Complex
• WRS :Wide Area Augmentation System Reference Station
• WRS :Wide-area Reference Station
• WSA :Western Service Area
• WSC :Western Service Center
• WSCMO :Weather Service Contract Meteorological Observatory
• WSFO :Weather Service Forecast Office
• WSO :Weather Service Office
• WSP :Weather Systems Processor
• WSR :Weather Surveillance Radar
• WSUS :Windows Server Update Service
• WTHR :Weather
• WX :Weather

X

• XML :eXtensible Markup Language

Z

• ZAB :Albuquerque ARTCC
• ZAN :Anchorage ARTCC
• ZAU :Chicago ARTCC
• ZBW :Boston ARTCC
• ZDC :Washington ARTCC
• ZDV :Denver ARTCC
• ZFW :Fort Worth ARTCC
• ZHU :Houston ARTCC
• ZID :Indianapolis ARTCC
• ZJX :Jacksonville ARTCC
• ZKC :Kansas City ARTCC
• ZLA :Los Angeles ARTCC
• ZLC :Salt Lake City ARTCC
• ZMA :Miami ARTCC
• ZME :Memphis ARTCC
• ZMP :Minneapolis ARTCC
• ZNY :New York ARTCC
• ZOA :Oakland ARTCC
• ZOB :Cleveland ARTCC
• ZSE :Seattle ARTCC
• ZTL :Atlanta ARTCC