Acronim ======== 3D Three-Dimensional - 3G Third Generation - 3GCN Third Generation Cabin Network - 4D Four-Dimensional - A Ampere(s) - A Autotuned Navaid - A Aspect Ratio Of Wing - A Helicopter Rotor Disk Area - a Alpha-Angle Of Attack - A&P Airframe And Power Plant - A/B Autobrake - A/C Aircraft - A/D Analog-To-Digital - A/G Air/Ground; Air To Ground - a/l Airline - A/L Autoland - A/N Alphanumeric - A/P Autopilot - A/T Autothrottle - AAA Anti-Aircraft Artillery - AAC Aeronautical Administration Communications - AAC Airline Administrative Communications - AAF Airway Facilities Service - AAIB Air Accident Investigation Branch (UK Equivalent of NTSB) - AAIPT Again Aircraft Integrated Product Team - AAIU Air Accident Investigation Unit - AAL Above Aerodome Level - AALC Autonomous Approach Landing Capability - AAMP Advanced Architecture Microprocessor - AAS Advanced Automation System - AATT Advanced Aviation Transportation Technology - ABC Automatic Brightness Control - ABC Activity-Based Costing - A-BPSK Aviation Binary Phase Shift Keying - AC Advisory Circular - AC Alternating Current - AC2 Dolby Surround - ACAA Air Carrier Association Of America - ACAC Air-Cooled Air Cooler - ACAMS Aircraft Condition Analysis Management System - ACARS Aircraft Communications Addressing And Reporting System - ACAS Airborne Collision Avoidance System - ACC Active Clearance Control - ACC Area Control Center - ACC Airspace Control Center - ACC Advanced Carbon/Carbon - ACCHL Associated Control Channel, L-Band - ACD Automatic Conflict Detection - ACDO Air Carrier District Office - ACE Actuator Control Electronics - ACE Advanced Certification Equipment - ACF Area Control Facility - ACG Assessment Compliance Group - ACIPS Airfoil Cowl Ice Protection System - ACK Acknowledgment - ACM Air Combat Maneuvering - ACMF Airplane Condition Monitoring Function - ACMP Alternating Current Motor Pump - ACMS Aircraft Condition Monitoring System - ACNSS/ Advanced Communication/ Navigation/Surveillance System - ACP Audio Control Panel - ACS Active Control System - ACS Audio Control System - ACT Active - ACTC Airport Traffic Control Towers - ACTD Advanced Concept Technology Demonstration - ACU Aircraft Communications System - ACU Apron Control Unit - ACU Autopilot Control Unit - ACU Antenna Control Unit - AD Airworthiness Directives - ADA A Computer Programming Language - ADAS Automated Weather Observing System Data Acquisition System - ADB Airport Data Base - ADC Air Data Computer - ADC Air Defense Command - ADE Application Development Engineer - ADF Automatic Direction Finding - ADG Air-Driven Generator - ADI Attitude Director Indicator - ADIRS Air Data Inertial Reference System - ADIRU Air Data Inertial Reference Unit - ADL Aeronautical Data Link - ADLP Aircraft Data Link Processor (Mode S) - ADLP Airborne Data Link Protocol - ADM Air Data Module - ADMS Airline Data Management System - ADN Aircraft Data Network - ADO Airline Dispatch Office - ADO Airport District Office - ADP Air Driven Pump - ADR Address - ADR Advanced Data Research - ADR Alternative Dispute Resolution - ADRAS Airplane Data Recovery And Analysis System - ADS Automatic Dependent Surveillance - ADS Air Data System - ADSA Automatic Dependent Surveillance- Automation - ADS-A Automatic Dependent Surveillance- Addressed - ADS-B Automatic Dependent Surveillance- Broadcast - ADS-C Ads Contract - ADSEL Address Selective - ADSP Automatic Dependent Surveillance Panel - ADSSG Ads Study Group (ICAO) - ADSU Automatic Dependent Surveillance Unit - ADT Air Data Tester - AEA Aircraft Electronics Association - AECU Audio Electronic Control Unit - AED Algol Extended For Design - AEEC Airlines Electronic Engineering Committee (ARINC) - AEP ARINC Engineering Practices - AEP Audio Entertainment Player - AERA Automated En Route Air Traffic Control - Aero B-Gan Next Generation Broadband - AES Aircraft Earth Station (Inmarsat) - AESA Active Electronically Scanned Array - AESS Aircraft Environment Surveillance System - AEW Airborne Early Warning - AF Airway Facilities - AF Air Force - AFB Air Force Base - AFC Aeronautical Frequency Committee (AEEC) - AFC Automatic Frequency Compensation - AFC Automatic Frequency Control - AFCAS Automatic Flight Control Augmentation System - AFCS Automatic Flight Control System - AFD Adaptive Flight Display - AFD Autopilot Flight Director - AFDC Autopilot Flight Director Computer - AFDS Autopilot Flight Director System - AFDX Avionics Full-Duplex Ethernet Switch - AFEPS ACARS Front-End Processing System - AFGCS Automatic Flight Guidance And Control System - AFI Authority Format Identifier - AFIRS Autonomous Flight Information Collection And Reporting System - AFIS Airborne Flight Information System - AFIS Airbus In-Flight Information Service - AFIS Automatic Flight Information Service - AFIS Automated Flight Inspection System - AFM Aircraft Flight Manual - AFMC Air Force Material Command - AFMS Automatic Flight Management System - AFN Air Traffic Services Facilities Notification - AFP Airspace Flow Program - AFRL Air Force Research Lab - AFRSI Advanced Flexible Reusable Surface Insulation - AFS Additional Secondary Factors - AFS Aeronautical Fixed Service (ICAO) - AFS Automatic Flight System - AFSK Audio Frequency Shift Keying - AFSS Automated Flight Service Stations - AFTN Aeronautical Fixed Telecommunications Network - AFTRCC Aerospace And Flight Test Radio Coordinating Council - AFU Artificial Feel Unit - AGACS Automatic A/G Communication System - AGAE A/G Applications Engineering - AGATE Advanced General Aviation Transport Experiments (Nasa) - AGC Automatic Gain Control - AGCOS A/G Communication Services - AGCS Air-Ground Communication System - AGCS Air-Ground Communication Systems - AGCU Auxiliary Generator Control Unit - AGDL A/G Data Link - AGIS A/G Intermediate System - AGL Above Ground Level - AGM Air-To-Ground Missile - AGR A/G Router - AGRM Air/Ground Router-Regional Manager - AGS A/G System - AGSS ACARS Ground System Standard (AEEC) - AGTS A/G Test Station - AGVS A/G Voice Sub-Network - AGW Arts Gateway - AH Attack Helicopter - AHC Attitude Heading Computer - AHMS Aircraft Health Monitoring System - AHRS Attitude Heading Reference System - AI Alternative Interrogator - AI Application Interface - AI Area Incursion - AI Artificial Intelligence - AI Access Identifier - AIA Aerospace Industries Association - AIAA American Institute Of Aeronautics And Astonautics - AIC Aeronautical Information Circular - AIDC Air Traffic Services Interfacility Data Communications - AIDS Aircraft/Airborne Integrated Data System - AIED Aeronautical Industry Engineering And Development - AIEM Airlines International Electronic Meeting - AIFSS Automated International Flight Service Stations - AIL Aileron - AIM Air Intercept Missile - AIM Airmans Information Manual - AIMS Airplane Information Management System - AIMS Airport Information Management System - AINSC Aeronautical Industry Service Communication - AIO Analog Input/Output - AIP Aeronautical Information Publication - AIP Analog Input - AIP Airport Improvement Program - AIRAC Aeronautical Information Regulation And Control - AIRCOM Digital Air/Ground Communications Service (SITA) - AIRMET Airman'S Meteorological Information - AIRO Analog Input/Reference Output - AIS Aeronautical Information Service - AIS Automatic Information Services (Eurocontrol) - AISG Applications Interface Sub-Group (Iata) - AIV Accumulator Isolation Valve - AJPS Afeps Journal Processing System - ALC Airline Link Control - ALC Asynchronous Link Control - ALC Automatic Level Control - ALCM Air-Launched Cruise Missile - ALD Hold Altitude Hold Mode - ALMDS Airborne Laser Mine Detection System - ALPA Air Line Pilots Association - ALPS Automatic Line Protection Service - ALS Application Layer Structure - ALT Airborn Link Terminal - ALT Altitude/Alternate - ALTM Altimeter - ALTN Alternate - ALTN Alternate (Airport) - ALTRV Altitude Reservation - ALTS Altitude Select - ALU Arithmetic And Logic Unit - AM Access Module - AM Amplitude Modulation - AMASS Airport Movement Area Safety System - AMC Air Mobility Command - AMC Auxiliary Maintenance Computer - AMC Avionics Maintenance Conference - AMCP Aeronautical Mobile Communications Panel - AMD Advisory Map Display - AME Amplitude Modulation Equivalent - AMI Airline Modifiable Information - AMIS Aircraft Management Information System - AMLCD Active Matrix Liquid Crystal Display - AMOSS Airline Maintenance And Operation Support System - AMP Audio Management Panel - AMP Avionics Modernization Program - AMPL Amplifier - AMPR Airframe Manufacturers Planning Report - AMRAAM Advanced Medium-Range Air-To-Air Missile (Now Aim-120) - AMS ARINC Maintenance Service - AMS Apron Management Service - AMS Avionics Management Service - AMS Acquisition Management System - AMS(R)S Aeronautical Mobile Satellite (Route) Service - AMSS Aeronautical Mobile Satellite Service - AMTOSS Aircraft Maintenance Task Oriented Support System - AMTS Aeronautical Message Transfer Service - AMU Audio Management Unit - AMU ACARS/Avionics Management Unit - AMUX Audio Multiplexer - ANA All Nippon Airways - ANC Air Navigation Commission (ICAO) - ANDC Airport And Navigation Data Compiler - ANFR Agence Nationale Des Frequences - ANFS Aircraft Network And File Server - ANICS Alaskan Nas Interfacility Communication - ANLP ARINC Network Layer Protocol - ANP Actual Navigation Performance - ANP Air Navigation Plan/Performance - A-NPA Advanced Notice Of Proposed Amendment - ANR Active Noise Reduction - ANS Air Navigation System - ANS Ambient Noise Sensor - ANSI American National Standards Institute - ANSIR Advanced Navigation System Inertial Reference - ANSP Air Navigation Service Providers - ANSU Avionics Network Server Unit - ANTC Advanced Networking Test Center - AO Acronymic Obfuscation - AOA ACARS Over Avlc - AOA Office Of The Administrator (FAA) - AOA Angle Of Arrival - AOA Angle Of Attack - AOAS Advanced Oceanic Automation System - AOC Airport Obstruction Chart - AOC Airline Operational Control Center - AOC Airport Operational Communications - AOC Aircraft Operational Control - AOC Airline Operational Control - AOC Aeronautical Operational Control - AOC Airline Operations Center - AOCC Airline Operations Control Center - AODB Airport Operational Database - AODC Age Of Data, Clock (GPS) - AODE Age Of Data, Ephemeris (GPS) - AOG Aircraft On Ground - AOHE Air/Oil Heat Exchanger - AOM Aircraft Operating Manual - AOP Analog Output - AOP Aeronautical Osi Profile - AOP Airline Operational Procedure - AOPA Aircraft Owners And Pilots Association - AOR Area Of Responsibility - AOR Atlantic Ocean Region - AOR-E Atlantic Ocean Region-East - AOR-W Atlantic Ocean Region-West - AP Airport Location (ACARS/Afeps) - APA Autopilot Amplifier - APA Allied Pilots Association - APANPIRG Asia/Pac Air Navigation Planning & Implementation Regional Group - APB Auxiliary Power Breaker - APB Acquisition Program Baseline - APC Aeronautical Passenger Communication - APC Aeronautical Public Correspondence - APC Autopilot Computer - APCO Association Of Public Safety Communications Officials - APEX Application/Executive Software - APFA Association Of Professional Flight Attendants - APFDS Autopilot Flight Director System - API Application Programming Interface - APIM ARINC Ia Project Initiation/Modification - APIRS Attitude And Positioning Inertial Reference System - APL Applied Physics Laboratory - APLCs Airport Performance Laptop Computers - APM Approach Path Monitor - APMS Automated Performance Measurement System - APN ARINC Packet Network - APP Approach Control - APPR Approach - APR Actual Performance Reserve - APRL Atn Profile Requirement List - APU Auxiliary Power Unit - APUC Auxiliary Power Unit Controller - APX Application/Executive Software - AQF Avionics Qualification Facility - AQP Advanced Qualification Program - AQP Avionics Qualification Procedure/Program - A-QPSK Aeronautical Quadrature Phase Shift Keying - AQS Advanced Quality System - ARAC Aviation Rulemaking Advisory Committee (FAA) - ARB Arbitrary Waveform Generator - ARD Advanced Requirement Definition - ARDEP Analysis Of Research & Development In Eurocontrol Programs - ARF Airline Risk Factor - ARM Area Regional Manager - ARM Anti-Radiation Missile - ARMC Area Regional Maintenance Center - ARP Air Data Reference Panel - ARPA Previous/Alternate Name For Darpa - ARPANET Internet Predecessor - ARTAS Atm Surveillance Tracker And Server - ASAS Aviation Safety Analysis System - ASAS Aircraft Separation Assurance System (Aeec) - ASC Aircraft System Controller - ASC Aural Synthesizer Card - ASCB Avionics Standard Communication Bus - ASCII American Standard Code For Information Interchange - ASCPC Air Supply And Cabin Pressure Controllers - ASCS Air Supply Control System - ASCU Anti-Skid Control Unit - ASD Aircraft Situation Display - ASDAR Aircraft-To-Satellite Data Relay - ASDB Aircraft Specific Database - ASDE Airport Surface Detection Equipment - ASDEX Airport Surface Detection Equipment, Model X - ASDL Aeronautical Satellite Data Link - ASDR Airport Surface Detection Radar - ASE Altimetry System Error - ASECNA Agency For Security Of Aerial Navigation In Africa And Madagascar - ASG ARINC Signal Gateway - ASI Airspeed Indicator - ASI Avionics System Integration - ASIC Application Specific Integrated Circuit - ASL Above Sea Level - ASM Airspace Management - ASM Autothrottle Servo Motor - ASM Air-To-Surface Missile - ASME American Society Of Mechanical Engineers - A-SMGCS Advanced Surface Movement Guidance And Control Systems - ASOR Allocating Safety Objectives And Requirements - ASOS Automated Surface Observation System - ASP ACARS Sub-Network Protocol - ASP Altitude Set Panel - ASP Aeronautical Fixed Service Systems Planning (Afs) - ASP Acquisition Strategy Paper - ASP Arrival Sequencing Program - ASPJ Airborne Self-Protection Jammer - ASPP Application Specific Programmable Processor - ASR Airport Surveillance Radar - ASRAAM Advanced Short-Range Air-To-Air Missile - ASRS Aviation Safety Reporting System - ASSTC Aerospace Simulation And Systems Test Center - ASSV Alternate Source Selection Valve - ASTA Airport Surface Traffic Automation - ASTERIX All Purpose Structured Eurocontrol Radar Information Exchange - ASTF Airspace System Task Force - ASTM American Society For Testing And Materials - ASTOR Airborne Stand-Off Radar (Uk) - ASTOVL Advanced Short Take-Off/Vertical Landing (Jsf/F-35 Predecessor Program) - ASV Alternate Servo Valve - ASVI Avionics Serial Video Interface - ASW Anti-Submarine Warfare - AT Air Transport - AT At An Altitude - AT/SC Autothrottle/Speed Control - ATA Actual Time Of Arrival - ATA Air Transport Association - ATA Air Transport Association Of America - ATAS Aviation Traffic And Application Software - ATB Advanced Technology Bomber (B-2 Predecessor Program) - ATC Advanced Technology Center - ATC Air Traffic Control - ATCA Air Traffic Control Association - ATCBI Atc Beacon Interrogator - ATCC Area And Terminal Control Center - ATCRBS Atc Radar Beacon System - ATCSS Atc Signaling System - ATCT Air Traffic Control Tower - ATD Advanced Technology Demonstration - ATDL Air Transport Data Link - ATE Automatic Test Equipment - ATE Avionics Test And Evaluation - ATF Advanced Tactical Fighter (F-22 Predecessor Program) - ATFM Air Traffic Flow Management - ATG Advanced Concept Technology Demonstration - ATHR Autothrust System - ATI Airborne Tracker Illuminator - ATIDS Airport Surface Target Identification System/Service - ATIS Airport Traffic Information System - ATIS Automated Terminal Information Service - ATIS Automatic Terminal Information Service - ATIS-B Automatic Terminal Information Service - Broadcast - ATL Autothrottle Limit - ATLAS Abbreviated Test Language For Avionics Systems - ATM Air Traffic Management - ATM Asynchronous Transfer Mode - ATM Dss Atm Decision Support Service - ATMAS Atm Automation System - ATMB Air Traffic Management Bureau - ATMS Area Navigation, Test And Management Services - ATN Aeronautical Telecommunication Network - ATNE Atn Engineering - ATNP Atn Panel - ATO Air Traffic Operations - ATO Air Traffic Organization (FAA) - ATOP Advanced Technologies And Oceanic Procedures - ATP Acceptance Test Procedure/Plan - ATPAC Air Traffic Procedures Advisory Committee (FAA) - ATR Air Transport Radio: ARINC Form-Factor/Standard Case Dimensions; 1 - ATR Acceptance Test Report - ATR Air Transport Racking - ATS Air Traffic Services - ATS Air Turbine Starter - ATS Autothrottle System - ATSC Air Traffic Services Communication - ATSGF Air Traffic Services Geographic Filter - ATSMP Air Traffic Services Message Processor - ATSO Air Traffic Services Organization - ATSP Air Traffic Services Provider - ATSRAC Aging Transport Systems Rulemaking Advisory Committee - ATSRAC Aging Transport Systems Rulemaking Advisory Committee (FAA) - ATSU Air Traffic Services Unit - ATWR Apron Tower (And Operator) - AUSRIRE All Union Scientific Research Institute Of Radio Equipment: Cis (Former Soviet) Agency - AUX Auxiliary - AVC Aviation VHF Car Rental Availability (Messages) - AVH Aviation VHF Hotel Availability (Messages) - AVLAN Avionics Local Area Network - AVLC Aviation VHF Link Control - AVM Airborne Vibration Monitor - AVN Avionics - AVOD Audio And Video Channels On Demand - AVOL Aerodrome Visibility Operational Level - AVPAC Aviation VHF Packet Communications - AVS Aviation VHF Seat Availability (Messages) - AVS Avionics Management System - AWACS Airborne Warning And Control System - AWAS Automated Weather Advisory Station - AWG American Wire Gauge - AWIN Advanced Weather Information System - AWIN Aviation Weather Information - AWIPS Advanced Weather Interactive Processing System - AWLU Aircraft Wireless Lan Unit - AWM Auto Warning Mixer - AWO All Weather Operations - AWOP Awo Panel - AWOS Automated/Airport Weather Observing System - AWR Aviation Weather Research - AZ Azimuth: Angular Measurement In Horizontal Plane - b (beta) Sideslip Angle; Prandtl-Glauert Compressibility Correction - BBML Broadband Multi-Link - BDA Bomb Damage Assessment - BDA Bomb (Or Battle) Damage Assessment - BDMIS Business Data Management And Invoicing System - BDS Comm-B Designation Subfield - BEA Bureau D'Enquetes Accidents: French Equivalent Of Ntsb - BEP Back-End Processor - BEPMS Bep Management System - BER Bit Error Rate - BFE Buyer Furnished Equipment - BFL Balanced Field Length - BFO Beat Frequency Oscillator - BFO Blazing Flash Of The Obvious (Dod) - BGARS Basic General Aviation Research Simulator - BGI Bus Grant Inhibit - BGP Border Gateway Protocol - BI Burn-In - BiGs Bilingual Ground Station (ACARS And VDL Mode 2) - Binary Base-2 Counting System - BINGO Fuel State At Which A Pilot Must Begin To Return To Base - BIS Boundary Intermediate System - BISMS Bis Management System - BIST Built-In Self-Test - BiSync Binary Synchronous Control - BIT Built-In Test - Bit A Binary Digit - BIT Built-In Test - BITE Built-In Test Equipment - BIU Bus Interface Unit - BL Boundary Layer - BLK Block/Black - BMI Bismaleimide (High Temp Composite Material) - BMV Brake Metering Valve - B-NAV Basic Area Navigation - BNR Binary - BNS Boundary Notification System (Squitters) - BOC Binary Offset Carrier - BOC Bottom Of Climb - BOP/COP Bit-Oriented Protocol/Character-Oriented Protocol - BP Bite Processor - BPCU Bus Power Control Unit - BPL Broadband Over Powerlines - BPS Bits Per Second - BPSK Binary Phase Shift Keying - BR Bridge - BRG Bearing - BRI Basic Rate Interface - BRNAV Basic Area Navigation - BRT Brightness - BSC Binary Synchronous Communication - BSCU Brake System Control Unit - BSN Backbone Sub-Network - BSP Board Support Package - BSU Beam Steering Unit - BSU Bypass Switch Unit - BTB Bus Tie Breaker - BTMU Brake Temperature Monitor Unit - BU Backup - BUEC Bu Emergency Communications - BUFR Binary Universal Form For Communication Representation - BWAN Bu Wide Area Network - Byte A Grouping Of Eight Bits - C&C Command And Control (Also C2) - C&W Control And Warning - C/A Code Course Acquisition Code (GPS) - C/NO Carrier-To-Noise Density Ratio - C/R Command/Response - C/SOIT Communications/Surveillance Operational Implementation Team - C/UT Code/Unit Test - C2 Command And Control - C41 Computers And Intelligence - C4ISR Computers, Intelligence, Surveillance And Reconnaissance - CA Conflict Alert - CAA Civil Aviation Administration - CAA Civil Aviation Authority - CAAC Civil Aviation Administration Of China - CAAS Common Avionics Architecture System - CAASD Center For Advanced Aviation System Development - CAASD Center For Advanced Aviation System Development (Mitre Corp.) - CAB Civil Aeronautics Board - CAC Caution Advisory Computer - CACP Cabin Area Control Panel - CAD Computer Aided Design - CADAG Communications, Automation And Data Link Applications Group - CADAM Computer Augmented Design And Manufacturing (Early Lockheed Cad System) - CADC Central Air Data Computer (An Analog System) - CADS Centralized Automatic Dependent Surveillance - CAE Component Application Engineer - CAGE Commercial Avionics GPS Engine - CAH Cabin Attendant Handsets - CAI Caution Annunciator Indicator - CAIV Cost As An Independent Variable - CAL China Airlines - CALSEL Variation Of Selcal System - CAM Computer Aided Manufacturing - CAN Controller Area Network - CANbus Control Area Network - CANSO Civil Air Navigation Services Organization - CAOC Combined Air Operations Center - CAP Civil Air Patrol - CAP Combat Air Patrol - CAPA Coalition Of Airline Pilots Association - CAPS Commercial Airliner Protection System - CARE Cooperative Actions On R&D In Eurocontrol - CAS Collision Avoidance System - CAS Commercially Available Software - CAS Close Air Support - CAS Calibrated Airspeed - CASA Controller Automated Spacing Aid - CASE Computer-Aided Software Engineering - CASR Civil Aviation Safety Regulations - CAT Category - CAT Clear Air Turbulence - CAT Computer Aided Testing - CAT Categories (I, Ii, Iiia/B/C) Approach - CATIA Computer-Aided, Three-D Interactive Application (High-End Cad System) - CAW Carrier Air Wing - CBA Cost/Benefit Analysis - CBT Computer-Based Training - CC Connection Confirm - CC Call Control - CCA Circuit Card Assembly - CCB Converter Circuit Breaker - CCB Configuration Control Board - CCC Command, Control, & Communications ("C-Cubed") - CCD Category Class Diagram - CCD Cursor Control Device - CCD Charged Coupled Device - CCD Coherent Change Detection - CCIR International Radio Consultative Committee - CCITT Consultative Committee International Telephone And Telegraph - CCP Consolidated Control Panel - CCS Cabin Communication System - CCS Common Core System - CCTV Closed-Circuit Television - CD Carrier Detect - CD Chrominance Difference - CD Compact Disk - CDA Continuous Descent Approach Arrival - CDA Coordinating Design Authority - CDAM Centralized Data Acquisition Module - CDAM Common Data Acquisition Module - CDG Configuration Database Generator - CDI Course Deviation Indicator - CDM Collaborative Decision-Making - CDMS Cdm System - CDMS Control And Data Management System - CDP Continuous Data Program - CDR Critical Design Review - CDRL Contract Data Requirements List - CDS Central Dispatch System - CDS Cockpit Display Systems - CDS Common Display System - CDSS Cockpit Door Surveillance System - CDT Controlled Departure Time - CDTI Cockpit Display Of Traffic Information - CDU Control Display Unit - CDV Compressed Digital Video - CEC Cooperative Engagement Capability - CEI Cabin Equipment Interfaces - CEPT Conference Europeene Des Postes Et Telecommunications - CER Cost Estimating Relationship - CF Change Field - CFD Computational Fluid Dynamics - CFDIU Centralized Fault Display Interface Unit - CFDS Central Fault Display System - CFDU Configurable File Data Unit - CFIT Controlled Flight Into Terrain - CFM Cubic Feet Per Minute - CFM Configuration Management - CFMU Central Flow Management Unit - CFS Cabin File Server - CG Center Of Gravity - CHI Computer/Human Interface - CHIS Center Hydraulic Isolation System - CI Configuration Item - CI Cabin Interphone - CID Category Interaction Diagram - CIDIN Common ICAO Data Interchange Network - CIDS Cabin Interphone Distribution System - CIE Commission Internationale De I ’Eclairage - CIGS Copper-Indium-Gallium-Diselenide - CIP Capital Investment Plan - CIP Convergence & Implementation Program (Eurocontrol) - CIS Common Information Services - CIS Corporate Information System - CLIN Contract Line Item Number - CLNP Connectionless Network Protocol - CLNS Connectionless Network Service - CLTP Connectionless Mode Transport Protocol - CM Context/Configuration Management - CMC Central Maintenance Computer - CMCF Cmc Function - CMCS Cmc System - CMD Command - CMF Common Message Format - CMGT Contract Management - CMM Capability Maturity Model - CMM Component Maintenance Manual - CMM Common Mode Monitor - CMN Control Motion Noise - CMOS Complementary Metal Oxide Semiconductor - CMP Configuration Management Plan - CMS Cabin Management System - CMU Communication Management Unit - CNA Center For Naval Analysis (Think-Tank For Usn) - CND Can Not Duplicate - CNDB Customized Navigation Database - CNES Centre National D’Etudes Spatiales - CNI Communications, Navigation And Identification - CNP Com/Nav/Pulse - CNS Communication, Navigation Surveillance - CNS/ATM Communications, Navigation, Surveillance/Air Traffic Management - CNSI Com/Nav/Serveillance/Identification - CNUS Cabin Network Server Unit - CO Commanding Officer - COA Certificate Of Authorization - COD Carrier On-Board Delivery - CODEC Coder/Decoder - COIN Counter-Insurgency - COM Cockpit Operating Manual - COM Communications - COM/MET/OPS Communications/Meterological/Operations - COMINT Communications Intelligence - COMINT/DF Comint Direction Finding - COMM Communications - COMSAT Communications Satellite Corp. - CON Continuous - CONOPS Concept Of Operations - CONUS Continental United States - COP Character-Oriented Protocol - COTP Connection-Oriented Transport Protocol - COTR Contracting Officer’S Technical Representative - COTS Commercial Off-The-Shelf (No Development Required) - COTS Commercial Orbital Transportation Services (Nasa Program For Manned Space Launcher) - CP Central Processor - CP Conflict Probe - CP Control Panel - CPA Closest Point Of Approach - CPA Coalition Of Airline Pilots Associations - CPA Collision Prediction And Alerting - CPC Controller-Pilot Communications - CPC Cabin Pressure Controller - CPC Cursor Position Control - CPCI Computer Program Configuration Item - CPCS Cabin Pressure Control System - CPDLC Controller Pilot Data Link Communications - CPDLC Controller-Pilot Data Link Communications - CPE Circular Position Error - CPI Continuous Process Improvement - CPM Core Processing Module - CPM Critical Path Method - CPS Cabin Pressure Sensor - CPS Central Processing System - CPU Central Processing Unit - CR Change Of Request - CR Contrast Ratio - CR Connection Request - CRA Conflict Resolution Advisory - CRAF Civil Reserve Air Fleet - CRC Cyclic Redundancy Checking/Code - CRD Current Routing Domain - CRDA Cooperative Research And Development Agreement - CRISD Computer Resources Integrated Support Document - CRISTAL Cooperative Validation Of Surveillance Techniques And Applications - CRM Crew/Cockpit Resource Management - CRM Collision Risk Model - CRM Crew Resource Management - CRMA Code Reuse Multiple Access - CRPA Controlled Reception Pattern Antenna - CRR Cutover Readiness Review - CRS Course - CRT Cathode Ray Tube - CRZ Cruise - CS Common Service - CS Commercial Service - CSC Common Signaling Channel - CSC Cargo System Controller - CSC Computer Software Component - CSCI Computer Software Configuration Item - CSCP Cabin System Control Panel - CSDB Commercial Standard Data Bus - CSDS Cargo Smoke Detector System - CSEU Control Systems Electronics Unit - CSF Command/Status Frame - CsLEOS Real Time Operating System (Os) - CSMA Carrier Sense Multiple Access - CSMA/CD Carrier Sense Multiple Access With Collision Detection - CSMM Crash Survivable Memory Modules - CSMU Cabin System Management Unit - CSPA Closely Spaced Parallel Approach - CSS Cabin Systems Subcommittee - CSTAC Commercial Space Transportation Advisory Committee (FAA) - CSU Channel Service Unit - CSU Configuration Strapping Unit - CSU Computer Software Unit - CTA Control Area - CTA Controlled Time Of Arrival - CTAF Common Traffic Advisory Frequency - CTAI Cowl Thermal Anti-Icing - CTAS Center Tracon Automation System - CTC Cabin Temperature Controller - CTD Cabin Training Device - CTL Control - CTMO Centralized Air Traffic Flow Management Organization - CTOL Conventional Take-Off And Landing - CTR Control Zone - CTR Center - CTRD Configuration Test Requirements Document - CTRL Control - CTS Clear To Send - CTS Conformance Test Suite - CTS/TCTS Combat Training System/Tactical Combat Training System - CTU Cabin Telecommunications Unit - CU Combiner Unit (Hud) - CU Channel Utilization - CU Control Unit - CUG Closed User Group - CUTE Common Use Terminal Equipment - CV Aircraft Carrier, Heavier-Than-Air Aircraft - CV/DFDR Cockpit Voice And Digital Flight Data Recorder - CVN Aircraft Carrier, Heavier-Than-Air, Nuclear Powered - CVR Cockpit Voice Recorder - CVRCP Cockpit Voice Recorder Control Panel - CW Continuous Wave - CW Clockwise - CWI Continuous Wave Interference - CWP Central Weather Processor - CWP Controller/Ed Working Position - CWS Control Wheel Steering - d Delta-Deflection Of Controls - D Delta-Wing Sweep - D8PSK Differential 8-Phase-Shift Keying - DA Descent Advisor - DA Design Authority - DA Digital-To-Analog - DAB Defense Acquisition Board - DABS Discrete Addressable Beacon System - DAC Digital-To-Analog Converters - DADC Digital Air Data Computer - DADS Digital Air Data System - DAISS Digital Airborne Intercommunication Switching System - DAP Digital Service Access Product - DAP Direct Action Penetration - DAP Download Of Aircraft Parameter - DAPCA Development And Procurement Cost Of Aircraft (Rand Cost Model) - DAPs Downlink Aircraft Parameters - DAR Data Access Recorder - DARC Direct Access Radar Channel - DARP Dynamic Aircraft Route Planning - DARPA Defense Advanced Research Projects Agency - DAS Digital Audio Subcommittee - DAS Designated Alteration Station - DAS Distributed Aperture System - DASS Defensive Aids Sub-System - DATCOM Data Compendium (Usaf Aerodynamics Methodology Report) - D-ATIS Digital Automatic Terminal Information Service - DB Database - dB Decibel - dBA Db Adjusted - DBI Downlink Block Identifier - dBI Db Referenced To An Isotropic Antenna - dBI Decibels Above Isotopic Circular - dBM Db Below 1 Milliwatt - DBS Direct Broadcast Satellite - DBU Database Unit - DBU Dial Backup - dBW Db-Watts Or Referenced To 1 Watt - DC Disconnect Confirm - DC Direct Current - DCAS Digital Control Audio System - DCD Double Channel Duplex - DCE Data Communications Equipment - DCGF Data Conversion Gateway Function - DCL Departure Clearance (European) - DCM Digital Coherent Mute - DCMC Defense Contract Management Command - DCMF Data Communication Management Function - DCMS Data Communication Management System - DCN Document/Drawing/Design Change Notice - DCP Data Communication Process - DCP Display Control Panel - DCPR Defense Contractors Planning Report - DCS Double Channel Simplex - DCU Data Concentration Unit - DCV Directional Control Valve - DD Data Delivery - DDA Digital Differential Analyzer - DDD Dual Disk Drive - DDM Difference In Depth Of Modulation - DDP Declarations Of Design And Performance - DDR Draft Document Review - DDR Double Data Rate - DDRMI Digital Distance Radio Magnetic Indicator - DDS Data Link Delivery Of Expected Taxi Clearances - DDS Direct Digital Synthesizer - DDT Downlink Data Transfer - DE-BPSK Differentially Encoded Binary Phase Shift Keying - DECCA A Navigation System Widely Used By European Shipping - DE-QPSK Differentially Encoded Quaternary Phase Shift Keying - DER Designated Engineering Representative - DERA Defence Research And Evaluation Agency - DEU Display Electronics Unit - DF Direction Finding - DFA Direction Finding Antenna - DFCS Digital Flight Control System - DFDAF Digital Flight Data Acquisition Function - DFDAMU Digital Flight Data Acquisition Management Unit - DFDAU Digital Flight Data Acquisition Unit - DFDR Digital Flight Data Recorder - DFDU Digital Flight Data Unit - DFGC Digital Flight Guidance Computer - DFGS Digital Flight Guidance System - DFIDU Dual Function Interactive Display Unit - DFIU Digital Flight Instrument Unit - DFOA Difference of Frequency of Arrival - DFS Digital Frequency Select - DFS Deutsche Flugsicherung Gmbh (Germany) - DfT Department For Transport (Uk) - DFU Digital Function Unit - DG Directional Gyro - DGNSS Differential Global Navigation Satellite System - DGPS Differential Global Positioning System - DH Decision Height - DHCP Dynamic Host Configuration Protocol - DHS Department Of Homeland Security - DI Data Interrupt - DIFAX Digital Facsimile - DIGNU Deeply Integrated Guidance And Navigation Unit - DIP Data Interrupt Program - DIP Dual In-Line Package - DIR Director - DIR/INTC Direct Intercept - DIRCM Direct Infrared Countermeasures - DISA Defense Information Systems Agency - DISC Disconnect - DISCH Discharge - DIST Distance - DITS Data Information Transfer System - diurnal Day Or Night - DL Data Link - DL/MSU Data Loader/Mass Storage Unit - DLAP Data Link Application Processor - DLC Data Link Control - DLCI Data Link Control Identifier - DLE Data Link Entity - DLK Data Link (Aeec) - DLK_Users Data Link Users Forum - DLL Data Link Layer - DLM Data Link Management Unit - DLME Data Link And Message Engineering - DLORT Data Link Operational Requirements Team - DLP Data Link Processor - DLS Data Link Service/System - DLU Download Unit - DM Disconnected Mode - DMA Direct Memory Access - DMD Digital Memory Device - DME Distance Measuring Equipment - DME/N Dme Normal - DME/P Dme Precision - DMM Data Memory Module - DMS Debris Monitoring Sensor - DMS Data Link Management System - DMSO Defense Modeling And Simulation Office - DMU Data Management Unit - DoD Department Of Defense - DOF Degree Of Freedom - DoT Department Of Transportation - D-OTIS Digital Operational Terminal Information Service - DOTS Dynamic Ocean Tracking System - DPI Dots Per Inch - DPR Dual Port Ram - DPSK Differential Phase Shift Keying - DR Dead Reckoning - DR Deduced Reckoning - DRAM Dynamic Random Access Memory - DREAMS Disaster Response And Emergency Medical Services - DRER Designated Radio Engineering Representative (FAA) - DRN Document Release Notice - DRVSM Domestic Reduced Vertical Separation Minimum - DSAD Digital Service Access Device - DSARC Defense System Acquisition Review Cycle - DSB Double Side Band - DSB Defense Science Board - DSB-AM Dsb, Full Carrier Digital Amplitude Modulation - DSDU Data Signal Display Unit - DSF Display System Function - DSP Data Link Service Provider - DSP Departure Sequencing Program - DSP Digital Signal Processor - DSP Display Select Panel - DSP Domain Specific Part - DSPDRV Display Driver - DSR Display System Replacement - DSS Decision Support Services - DSU Data Signaling Unit - DT&E Development Test And Evaluation - DTD Data Terminal Display - DTD Document Type Definition - DTE Data Terminal Equipment - DTED Digital Terrain Evaluation Data - DTG Distance-To-Go - DTM Demonstration Test Milestone - DTMF Dual Tone Multifrequency (Telephone) - DTOA Difference of Time of Arrival - D-TOC Digital Transfer Of Communications - DTP Distributed Targeting Processor - DTPDU Data Protocol Data Unit - DTRS Data Transceiver Router Server - DTS Digital Theatre Systems - DTU Data Transfer Unit - DU Display Unit - DUAT Direct User Access Terminal - DUATS Direct User Access Terminal System - DUST Dual-Use Science And Technology - DVD Digital Video Disc - DVF Demonstration And Validation Facility - DVM Digital Voltmeter - DVMC Digital Video Map Computer - DVOR Doppler Very High Frequency Omni Directional Range - DVRS Digital Voice Recorder System - DWAN Direct Wan - E&E Electronics And Equipment - E/D End-Of-Descent - E/O Engine-Out - EAA Experimental Aircraft Association - EACARS Enhanced ACARS - EAD Engine Alert Display - EAD European Ais Data Base (Eurocontrol) - EADI Electronic Attitude Director Indicator - EAFR Enhanced Airborne Flight Recorder - EAI Engine Anti-Ice - EAL Evaluation Assurance Level - EAL-7 Evaluation Assurance Level-7 - EANPG European Air Navigation Planning Group - EAP Engine Alert Processor - EAP Experimental Aircraft Program (Eurofighter Typhoon Ef-2000 Predecessor) - EAROM Electrically Alterable Rom - EARTS En Route Automated Radar Tracking System - EAS Equivalent Air Speed - EASA European Aviation Safety Agency - EASIE Enhanced Atm And Mode S Implementation In Europe - EASy Enhanced Avionics System - EATCHIP European Air Traffic Control Harmonization & Integration Program - EATMS European Atm System (Eurocontrol) - EATRADA European Atm Research And Development Association - EBR Extended Bit Rate - EC European Commission - ECAC European Civil Aviation Conference - ECACNAV Eurocontrol Navigation Web Site - ECAM Electronic Caution Alert Module - ECC Error Correcting Code - ECCM Electronic Counter-Countermeasures - ECEF Earth-Centered, Earth-Fixed - ECL Emitter Coupler Logic - eCM Equipment Conditioning Monitoring - ECM Electronic Countermeasures - ECMP Electronic Component Management System - ECN Engineering Change Notice - ECO Engineering Change Order - ECP Eicas Control Panel - ECP Engineering Change Proposal - ECS Engineering Compiler System - ECS Environmental Control System - ECS Event Criterion Subfield - ECSL Left Environmental Control System Card - ECSMC Ecs Miscellaneous Card - ECSR Right Environmental Control System Card - ECU Electronic Control Unit - ED Eicas Display - EDA Electronic Design Automation - EDAC Error Detection And Correction - EDARC Enhanced Direct Access Radar Channel - EDC Error Detection And Correction - EDDS Electronic Document Distribution Service - EDI Electronic Data Interchange - EDI Engine Data Interface - EDIF Engine Data Interface Function - EDIS Emergency Digital Information Service - EDIU Engine Data Interface Unit - EDMS Electronic Data Management System - EDP Electronic Data Processing - EDP Engineering Development Pallet - EDP Engine Driven Pump - EDS Embedded Diagnostic System - EDS Explosive Detection System - EDU Electronic Display Unit - EDU Electronic Display And Processing Unit - EE Electrical Engineer - EE Electronics Equipment - EEAS Enhanced En-Route Automation System - EEC Eurocontrol Experimental Center - EEC Electronic Engine Control - EEPROM Electrical Erasable Programmable Rom (Read Only Memory) - EEU Elms Electronics Unit - EFA European Fighter Aircraft (Eurofighter Typhoon Ef-2000 Predecessor) - EFB Electronic Flight Bag - EFC Expected Further Clearance - EFD Electronic Flight Display - EFDAS European Logical Flight Data Server (Eurocontrol) - EFDP European Flight Data Processing (Eurocontrol) - EFIC Electronic Flight Instrument Controller - EFIP Electronic Flight Instrument Processor - EFIS Electronic Flight Instrument System - EFIS Cp Efis Control Panel - EGIHO Expedited Ground-Initiated Handoff - EGIs Embedded GPS/Ins - EGNOS European Geostationary Overlay System - EGP Exterior Gateway Protocol - EGPWS Enhanced Ground Proximity Warning System - EGT Exhaust Gas Temperature - EHF Extremely High Frequency - EHP Equivalent Horsepower - EHSI Electronic Horizontal Situation Indicator - EHV Electro-Hydraulic Valve - EIA Electronic Industries Association - EIA Electrical Institute Of America - EICAS Engine Indication And Crew Alert System - EICASC Eicas Controls - EIPI Extended Initial Protocol Identifier - EIRP Earth Incident Radiated Power - EIRP Effective Isotropic Radiation Power - EIS Electronic Instrument System - EIS Engine Indication System - EIS Environmental Impact Statement - EISA Extended Industry Standard Architecture - EIU Electronic Interface Unit - ELB Electronic Logbook - ELEC Electrical - ELINT Electronic Intelligence - ELM Extended Length Message - ELMS Electrical Load Management System - ELS Electronic Library System - ELT Emergency Locator Transmitter - EM Element Manager - EM Electromagnetic - EMATS Endurance Management Air Traffic System - EMC Electromagnetic Compatibility - EMC Entertainment Multiplexer Controller - EMD Engineering, Manufacturing And Development - EMER Emergency - EMI Electromagnetic Interference - EMP Electromagnetic Pulse - EMS Emergency Medical Services - EMS Engine Management System - EMU Expansion Module Unit - ENG Engine - ENOC Engineering Network Operations Center - EOD End Of Day - EODAS Electro-Optical Distributed Aperture System - EOLA European Pre-Operational Data Link Applications - EOM End Of Message - EOP Operational Evolution Plan - EOT End Of Text - EOTS Electro-Optical Targeting System - EP Engineering Project - EP External Power - EPC Engineering Project Contractor - EPCS Engine Propulsion Control System - E-PIREPS Electronic Pilot Reports - EPLD Electronically Programmable Logic Device - EPLERS Enhanced Position Location And Reporting System - EPR Engine Pressure Ratio - EPROM Erasable Programmable Rom - EPS Electrical Power System - EPV End-Point Voltage - EQTG Electronic Qualification Test Guide - ERAST Environment Research Aircraft And Sensor Technology - ERB Engineering Review Board - ERD End Routing Domain - EROPS Extended Range Operations - ERP Effective Radiation Power - ERP Eye Reference Point - ERP Pdu Echo Replay Protocol Data Unit - ERPDU Error Protocol Data Unit - ERQ Pdu Echo Request Protocol Data Unit - ERU Engine Replay Unit - ES End System - ES Extended Squitter - ESA European Space Agency - ESAS Electronic Situation Awareness System - ESAS Enhanced Situational Awareness System - E-Scan Electronic Scanning - ESD Electrostatic Discharge - ESDS Electrostatic Discharge And Soldering - ESDS Electrostatic Sensitive Devices - ESH End System Hello - ESHP Equivalent Shaft Horsepower (Horsepower Including Residual Thrust) - ESID Engine And System Indication Display - ESIS Electronic Standby Instrument System - ESIS Engine And System Indication System - ESM Electronic Support Measures - ESOIC Enhanced Small-Outline Ic - ESR Equivalent-Series Resistance - ESS Environmental Stress Screening - ESS Electronic Switching System - ESSD Electrostatic Sensitive Devices - ESU Environmental Sensor Unit - ETA Estimated Time Of Arrival - ETAS Enhanced Tracon/Tower Automation System - ETB End Of Block (Ascii/Ia5 Character) - ETB Engineering Test Bed - ETC Estimated Time Of Completion - ETD Estimated Time Of Departure - ETE Estimated Time Enroute - ETI Elapsed Time Indicator - ETM Elapsed Time Measurement - ETM Electronic Training Manuals - ETMS Engine-Trend Monitoring Services - ETMS Enhanced Traffic Management System - ETNO European Telecommunications Network Operators - ETOPS Extended Operations - ETOPS Extended Twin-Engine Operations - ETP Equal Time Point (Halfway There, By Time) - ETRC Expected Taxi Ramp Clearances - ETSI European Telecommunications Standards Institute - ETVS Enhanced Terminal Voice Switch - ETX End Of Transmission - EU Electronic Unit - EU European Union - EUAFS Enhanced Upper Air Forecast System - EUPS External Uninterruptible Power Supply - EURATN European Atn - EURET European Research On Transport Systems - EUROCAE European Organization For Civil Aviation Equipment (European Equivalent Of Rtca) - EV Earned Value - EVM Error Vector Magnitude - EVS Enhanced Vision System - EW Electronic Warfare - EWEB Ethernet Webb - EWIS Electrical Wiring Interconnection System - exocentric Outside-The-Aircraft - EZAP Enhanced Zonal Analysis Procedures - F Fahrenheit - F&E Facilities And Equipment - F/A Fighter/Attack - F/O First Officer - FA Final Approach - FAA Federal Aviation Administration - FAA/EURO FAA/Eurocontrol R&D Committee - FAATC FAA Technical Center - FAB-T Family Of Advanced Beyond-Line-Of-Sight Terminals - FAC Flight Augmentation Computer - FAC Forward Air Control - FADEC Full Authority Digital Engine/Electronic Control - FAF Final Approach Fix - FAI First Article Inspection - FAMIS Full Aircraft Management/Inertial System - FANS Future Air Navigation System (ICAO) - FAR Federal Acquisition Regulation - FAR Federal Aviation Regulations - FAR Federal Acquisition Regulations - FAST Final Approach Spacing Tool - FAT Factory Acceptance Test - FB Fighter-Bomber - FBL Fly By Light - FBN Fly By Night - FBO Fixed-Base Operator - FBW Fly By Wire - FC Functional Capability - FC Foot Candles - FCA Functional Configuration Audit - FCC Flight Control Computer - FCC Federal Communications Commission - FCDC Flight Critical Direct Current - FCM Future Concepts For Maintenance - FCMA Fans Central Monitoring Agency - FCP Flight Control Processor - FCP Flight Control Panel - FCS Flight Control System - FCS Frame Check Sequence - FCS Future Concepts For Simulators - FD Flight Dynamics/Director - FD Final Data - FDAF Flight Data Acquisition Function - FDAU Flight Data Acquisitions Unit - FDB Flight Plan Data Bank - FDDI Fiber Distribution Data Interface - FDE Fault Detection And Exclusion - FDEP Flight Data Entry Panel - FDH Flight Deck Handset - FDI Fault Detection And Isolation - FDIMU Flight Data Interface Management Unit - FDIO Flight Data Input/Output - FDM Flight Data Monitoring - FDM Frequency Division Multiplex - FDMA Frequency Division Multiple Access - FDP Flight Data Processor - FDPS Flight Data Processing System - FDR Flight Data Recorder - FDRS Flight Data Recorder System - FEATS Future European Air Traffic Management System - FEC Forward Error Correction - FEP Front-End Processor - FERNS Far East Radionavigation Service - FF Fuel Flow - FFIC Free Flight Implementation Committee - FFRDC Federally Funded Research And Development Center - FFS Full Flight Simulator - FFT Full Flight Trainer - FGC Flight Guidance Computer - FGS Flight Guidance System - FHA Functional Hazard Assessment - FIAO Flight Inspection Area Office - FIB Forwarding Information Base - FIFO First In, First Out - FIM Fault Isolation Manual - FIR Flight Information Region - FIS Flight Information Services - FIS-B Fis-Broadcast - FIX Position In Space Usually On Aircraft'S Flight Plan - FL Flight Level - FL Foot Lampert - FLA Future Large Airlifter (European C-130 Replacement Project) - FLCH Flight Level Change - FLIR Forward-Looking Infrared - FLTCK Flight Check - FltWinds Flight And Weather Information And Decision Support - FLW Forward-Looking Windshear Radar - FM Frequency Modulation - FMA Flight Mode Annunciator - FMAC Frequency Management Advisory Council - FMC Flight Management Control/ Computer - FMC Future Concepts For Maintenance - FMCDU Flight Management Control And Display Unit (Fms) - FMCF Flight Management Computer Function - FMCS Flight Management Computer System - FMCW Frequency-Modulated Continuous Wave - FMEA Failure Mode And Effects Analysis - FMF Flight Management Function - FMGC Flight Management Guidance Computer - FMGEC Flight Management Guidance Envelope Computer - FMP Flight Mode Panel - FMS Flight Management System - FMSG Frequency Management Study Group (ICAO) - FMST Flight Management System Trainer - FMU Fuel Metering Unit - FNPRM Further Notice Of Proposed Rulemaking - FOC Full Operational Capability - FOC Fuel/Oil Cooler - FOD Foreign Object Debris - FOD Foreign Object Damage - FODA Flight Operations Data Assurance - FOG Fiber Optic Gyro - FOQA Flight Operational Quality Assurance - FOS Fiber Optics Subcommittee - FOV Field Of View - FOWG Fiber Optics Working Group - FPA Focal Plane Array - FPA Flight Path Angle - FPAC Flight Path Acceleration - FPC Flight Profile Comparator - FPGA Field Programmable Gate Array - FPM Feet Per Minute - FPV Flight Path Vector - FQIS Fuel Quality Indicating System - FQPU Fuel Quality Processor Unit - FQR Formal Qualification Review - FR Frame Relay - FRA Flap Retraction Altitude - FRAD Frame Relay Access Device - FRCS Flight Recorder Configuration Standard - FRED Flight Recorder Electronic Documentation - FRM Fault Reporting Manual - FRM Flammability Reduction Means - FRM Frame Reject Mode - FRMR Frame Reject - FRP Federal Radionavigation Plan - FRPA Fixed Reception Pattern Antenna - FRQ Frequency - FSAS Flight Service Automation System - FSC Future Combat Systems (Us Army) - FSE Fans Systems Engineering - FSE Field Service Engineer - FSEMC Flight Simulator Engineering And Maintenance Conference - FSEU Flap Slat Electronics Unit - FSF Flight Safety Foundation - FSM Flight Schedule Monitoring - FSS Flight Service Station - FSW Forward-Swept Wings - FSWE Fans Software Engineering - FT Functional Test - FT/ADIRS Fault Tolerant/Air Date Inertial Reference System - FTE Flight Technical Error - FTP File Transfer Protocol - FTPP Fault Tolerant Power Panel - FTS Federal Telecommunications System - FVHF Future VHF System Study (Eurocontrol) - FW Failure Warning - FW Firewall Router - FWC Flight Warning Computer - FWD Forward - FWS Flight Warning System - FY Fiscal Year - g Gamma-Flight Path Angle - G Gamma-Wing Dihedral Angle - G&A General And Administrative (Overhead Expenses) - G&C Guidance & Control - G/A Ground/Air Or Ground-To-Air - G/G Ground/Ground - G/S Glide Slope - GA Go-Around - GA General Aviation - GA Genetic Algorithm (Optimization Method) - GAAS Gallium Arsenide - GACS Genetic Atn Communications Service - GAGAN Geostationary Augmentation Network - GAIN Galley Inserts - GAIT Ground-Based Augmentation And Integrity Technique - GAMA General Aviation Manufacturers Association - GAN Global Area Network - GAO General Accounting Office - GATM Global Air Traffic Management - GAViS General Aviation Vision System - GBAS Ground-Based Augmentation System - GBST Ground Based Software Tool - GBT Ground-Based Transceiver - Gbyte Gigabyte (Billion Bytes) - GCA Ground Controlled Approach - GCAS Ground Collision Avoidance System - GCB Generator Circuit Breaker - GCC Ground Cluster Controller (ACARS) - GCI Ground Controlled Interception - GCP Glare-Shield Control Panel - GCS Ground Clutter Suppression - GCU Generator Control Unit - GDAP Growing Danger Of Acronym Proliferation - GDLP Ground Data Link Processor - GDOP Geometric Dilution Of Precision - GDP Ground Delay Program - GE Geopolitical Entity - GENOT General Notice - GEO Geosynchronous/Geostationary Earth Orbit - GEP Ground Entry Point - GES Ground Earth Station - GFE Government Furnished Equipment - GFI General Format Identifier - GFLOPS Gigaflops - GFSK Gaussian Frequency Shift Keying - GG Graphics Generator - GGR G/G Router - GGS GPS Ground Station - GGTFM Ground-Ground Traffic Flow Management - GH Ground Handling - GHz Gigahertz - GI Group Identifier - GIB Gnss Integrity Broadcast - GIC Gnss Integrity Channel - GIC GPS Integrity Channel - GICB Ground-Initiated Comm-B - GIHO Ground Initiated Handoff - GINS GPS-Inertial Navigation Systems - GIOVE-A Galileo In-Orbit Validation Experiment-A - GIP Government-Industry Partnership - GIS Geodetic Information System - GIS Graphical Information System - GIVE Grid Inospheric Vertical Error - GJU Galileo Joint Undertaking - GL Ground Location (ACARS/Afeps) - GL Group Length - GLC Geographic Locator Codes - GLNS GPS Landing And Navigation System - GLONASS Global Navigation Satellite System (Russia) - GLOW Gross Liftoff Weight (Wo For Rockets) - GLS Gnss Landing System - GLS GPS Landing System - GLU GPS Landing Unit - GM Guidance Material - GMC Ground Movement Control - GMDS Ground Mobile Data Service - GMPCS Global Mobile Personnel Communication Services - GMR Giant Magnetoresistive - GMT Greenwich Mean Time - GMTI Ground Moving Target Indicator - GMU GPS Monitoring Unit - GNA Global Network Architecture - GNE Gross Navigational Error - GNR Global Navigation Receiver - GNSS Global Navigation Satellite System - GNSSP Gnss Panel (ICAO) - GoMATS Golf Of Mexico Advanced Traffic Surveillance - GOPS Giga Operations - GOS Grade Of Service - GOSIP Government Open Systems Interconnection Profile - GP General Purpose - GP&C Global Positioning And Communications - GPADIRS Global Positioning, Air Data, Inertial Reference System - GPCBT Guidelines For The Production Of Computer-Based Training (Eurocontrol) - GPIB General Purpose Instrument Bus - GPIRS Global Positioning/Inertial Reference System - GPP General Purpose Processor - GPPUs General-Purpose Processing Units - GPRS General Packet Radio Services - GPS Global Positioning System - GPSSU GPS Sensor Unit - GPU Ground Power Unit - GPWC Ground Proximity Warning Computer - GPWS Ground Proximity Warning System - GR Ground Router - GRAS Ground-Based Regional Augmentation System - GRIP Gridded Binary (National Weather Service Model Output) - GRP Geographic Reference Point - GS Ground Speed/Station - GSC Ground Station Controller (ACARS) - GSE Ground Support Equipment - GSIF Ground Station Information Frame - GSM Global Systems Mobile - GSM Global System for Mobile Communications - GSMS Ground Station Management System - GSP Glare Shield Panel - GTC Data Link Ground Terminal Computer - GUI Graphical User Interface - GVE Graphics Vector Engine - GW Gateway - GWDS Graphic Weather Display System - GWS Graphical Weather Services - h Eta-Efficiency - HAA Height Above Airport - HAA High-Altitude Airship - HAD Hardware Architecture Document - HADS High-Altitude Platform Station - HALE High Altitude Long Endurance - HARM High-Speed Anti-Radiation Missile - HARS High Altitude Route System - HCI Human-Computer Interface - HCP Heads-Up Control Panel - HCS Host Computer System - HDD Head-Down Displays - HDG Heading - HDG Sel Heading Select - HDISK Hard Disk - HDL Hybrid Data Link - HDLC High-Level Data Link Control - HDLC-B Hdlc-Balanced - HDLMS Hybrid Data Link Management System - HDOP Horizontal Dilution Of Precision - HDP Hardware Development Plan - HDTV High-Definition Television - HE Altitude Error - HE High Explosive - He Helium - HEA Head Equipment Assembly - Helo Helicopter - HERF High-Energy Radio Frequency (Or Energy Radiated Fields: Dense) - HF High Frequency - HF Human Factors - HFACS Human Factors Analysis And Classification System - HFDL High Frequency Data Link - HFDM High-Frequency Data Modem - HFDR High Frequency Data Radio - HFI Human Factors Integration - HFNPDU High Frequency Network Protocol Data Unit - HFS High Frequency System - HFSG Human Factor Study Group - HFSNL High Frequency Subnetwork Layer - HFWG Human Factors Working Group - HGA High Gain Antenna - HGAS Hga System - HGC Head-Up Guidance Computer - HGI Hot Gas Ingestion - HGS Head-Up Guidance System - HGS Hfdl Ground Station - HHLD Heading Hold - HID Host Interface Display - HIL Horizontal Integrity Limit - HIRF High Intensity Radiated Field - HLCS High Lift Control System - HLE Higher Layer Entity - HLL High Level Language - HLR Home Location Register - HMD Helmet-Mounted Display - HMI Hazardously Misleading Information - HMI Human-Machine Interface - HMOS High Density Metal Oxide Semiconductor - HMU Height Monitoring Unit - HO Handoff - HOCSR Host/Oceanic Computer System Replacement - HOTAS Hands On Throttle And Stick - HOW Hand-Over Word - HP High Pressure - HP Holding Pattern - hPa Hecto Pascal - HPA High Power Amplifier - HPC High Pressure Compressor - HPR High Power Relay - HPSOV High Pressure Shutoff Valve - HPT High Pressure Turbine - HRD Home Routing Domain - HRM Home Regional Manager - HSD High-Speed Data - HS-DSAD High Speed Frame Relay Service Access Device - HSI Horizontal Situation Indicator - HSIT Hardware And Software Integration Test - HSL Heading Select - HSR High Stability Reference - HSRP Hot Standby Routing Protocol - HST-900 High Speed Transceiver - HTC Highest Two-Way Channel - HUD Head-Up Display - HUMS Health And Usage Monitoring System - HVPS High Voltage Power Supply - HWCI Hardware Configuration Item - HX Heat Exchanger - HYD Hydraulic - HYDIM Hyd Interface Module - Hz Hertz (Cycles Per Second) - I&TE Integration And Test Engineering - I/O Input/Output - IA Interoperability Assessment - IAC Integrated Avionics Computer - IACSP International Aeronautical Communications Service Provider - IAGS Integrated ARINC Ground Station - IANA Internet Assigned Number Authority - IAOA Indicated Angle Of Attack - IAOPA International Council Of Aircraft Owners And Pilots Association - IAPA Instrument Approach Procedures Automation - IAPS Integrated Avionics Processing System - IARP Inverse Address Resolution Protocol - IAS Indicated Airspeed - IAS Integrated Avionics Services (Full Service Avionics Product Development Consultant) - IAT Investment Analysis Team - IATA International Air Transport Association - IATA International Air Transport Association - IBAC International Business Aviation Council - IC Integrated Circuit - IC Intercabinet - ICAO International Civil Aviation Organization - ICAP Increased Capability - ICAP Improved Capability - ICARD ICAO Five-Letter Name Code & Route Designator System - ICC Iaps Card Cage - ICCAIA International Coordinating Council Of Aerospace Industries Association - ICD Interface Control Document/Drawing - ICD Interactive Design Center - ICD Installation Control Drawing - ICM Interline Communications Manual - ICMP Internet Control Message Protocol - ICNIA Integrated Communications, Navigation And Identification Avionics - ICP Integrated Core Processor - ICS Intercommunications System - ICS Interface Control Specification - ICSS Integrated Communication Switching System - ICU Integrated Control Unit - ICU Instrument Comparator Unit - ID Identifier/Identification - IDA Institute For Defense Analysis (Think-Tank For Dod) - IDC Internal Diagnostic Capabilities - IDC Indicator Display/Control - IDD Interface Design Document - IDEN Integrated Digital Enhanced Network - IDEO Innovation, Design Engineering Organization - IDG Integrated Drive Generator - IDI Initial Domain Identifier - IDIQ Indefinite-Delivery/Indefinite Quantity - iDMU Integrated Data Management Unit - IDP Initial Domain Part - IDRP Interdomain Routing Protocol - IDS Integrated Display System - IDS Inter-Domain System - IDS Ice Detection System - IDU Interactive Display Unit - IEC International Electrotechnical Commission - IEC Iaps Environmental Control Module - IEC International Engineering Consortium - IED Insertion Extraction Device - IEEE Institute Of Electrical And Electronics Engineers - IF Intermediate Frequency - IFALPA International Federation Of Airline Pilots Association - IFASS Integrated System For Surveillance And Radio Transmission - IFATCA International Federation Of Air Traffic Controllers' Association - IFC Indicated Final Cost - IFDL Intraflight Data Link - IFE In-Flight Entertainment - IFF Identification Friend-Or-Foe - IFIS Integrated Flight Information System - IFPS Integrated Initial Flight Plan Processing System - IFR Instrument Flight Rules - IFR In-Flight Refueling - IFRB International Frequency Registration Board - IGES Intermediate Ground Earth Station - IGES Standardized Graphics Exchange File - IGIA Interagency Group On International Aviation - IGV Inlet Guide Vane - IHAS Integrated Hazard Avoidance System - ILA International Law Association - ILM Independent Landing Monitor - ILS Instrument Landing System - ILSP Integrated Logistics Support Plan - IMA Integrated Modular Avionics - IMC Instrument Meteorological Conditions - IMG Implementation Manager Group - IMU Inertial Measurement Unit - IN.HG. Inches Of Mercury - INAV Interactive Navigation - INCD Integrated Navigation, Controls And Displays System - INFO Information Frame - INMARSAT International Maritime Satellite Organization - INMS Integrated Network Management System - INS Inertial Navigation System - INTELSAT International Telecommunications Satellite Organization - InterNIC Internet Network Information Center - Interop Interoperability - IOC Initial Operating Capability - ION Institute Of Navigation - IOR Indian Ocean Region - IOS Internet Operating System - IOT & E Initial Operational Test And Evaluation - IP Internet Protocol - IPACG Informal Pacific Atc Coordination Group - IPC Interprocess Communication - IPC Intermediate Pressure Compressor - IPD Industrial Products Division - IPI Initial Protocol Identifier - IPL Illustrated Parts List - IPPD Integrated Product And Process Development - IPR Internet Protocol Router - IPS Internet Service Providers - IPT Integrated Project Team - IPT Intermediate Pressure Turbine - IPT Integrated Product Team - IR Infrared - IR&D Investment Research And Development - IRAC Interdepartmental Radio Advisory Committee - IRIG-B Inter-Range Instrumentation Group-Time Code Format B - IRIS Iris Recognition Immigration System - IRP Integrated Refuel Panel - IRR Internal Rate Of Return - IRS Inertial Reference System - IRS Interface Requirements Specification - IRST Infrared Search And Track - IRU Inertial Reference Unit - IS Intermediate System - ISA Industry Standard Architecture - ISA Instrument Society Of America - ISC Integrated Systems Controller - ISDN Integrated Services Digital Network - ISDOS Information System Design And Optimization System - ISDU Inertial System Display Unit - ISH Intermediate System Hello - ISIS Integrated Sensor Is Structure - ISLN Isolation - ISMS In-Flight Safety Monitoring System - ISO Pa Iso Protocol Architecture - ISO International Standards Organization - ISP Integrated Switching Panel - ISP Internet Service Providers - Isp Specific Impulse (Rocket Propellant Consumption =3600/Sfc) - ISR Interrupt Service Routine - ISR Intelligence-Surveillance-Reconnaissance (Missions & Equipment) - ISS Integrated Surveillance System - ISSN Intermediate System Sub-Network - ISSS Initial Sector Suite System/Subsystem - ISU Initial Signal Unit - ISU Individual Subscriber Unit - IT Information Technology - ITAR International Traffic In Arms Regulations - ITC In-Trail Climb - ITD In-Trail Descent - ITM It Management - ITS Integrated Test System - ITSE Integrated Test And Support Environment - ITU International Telecommunications Union - ITU-R International Telecommunication Union –Radio Communication Bureau - ITWS Integrated Terminal Weather System - IUPS Internal Uninterruptible Power Supply - IV Isolation Valve - IVSI Instantaneous Vertical Speed Indicator - J/S Jammer-To-Signal Ratio - JAA Joint Aviation Authority - JAR Joint Airworthiness Requirement - JAR Joint Aviation Requirements (European Flight & Certification Specs) - JAR-AWO Jar-All Weather Operations - JAR-OPS Joint Airworthiness Requirement - JASSM Joint Air-To-Surface Standoff Missile - JAST Joint Advanced Strike Technology - JATO Jet-Assisted Take-Off - JCAB Japanese Civil Aviation Bureau - JDAM Joint Direct Attack Munition - JFET Junction Field Effect Transistor - JFS Joint Strike Fighter - JHMCS Joint Helmet-Mounted Cueing Systems - JP Jet Propellant (Kerosene-Based Fuel) - JPDO Joint Planning Development Office - JPO Joint Planning Office - JPS Journal Processing System - JRANS Japanese Regional Air Navigation System - JRC Joint Resource Council - JSAT Joint System Acceptance Test - JSF Joint Strike Fighter (Project Leading To F-35) - JSTARS Joint Surveillance Target Attack Radar System - JTAG Joint Test Action Group - JTIDS Joint Tactical Information Distribution System - JTRS Joint Tactical Radio System - J-UCAS Joint Unmanned Combat Air Systems - JV Joint Venture - kA Kiloamperes - KARI The Korea Aerospace Research Institute - KB Kilobytes (Thousand Bytes) - KBITS Kilobits - Kbps Kilobits Per Second - Kgls Kinematic GPS Landing System - KHz Kilohertz (1000 Cycles Per Second) - KISS Keep It Simple, Stupid - KPS Kb Per Second - ksps kilo symbols per second - KTS Knots - KVA Kilovolt-Ampere - KW Kilowatt - l (lambda) Wing Taper Ratio - L/D Lift To Drag Ratio - L1 L-Band Carrier (1575.42 Mhz) - L2 L-Band Carrier (1227.6 Mhz) - LAAS Local Area Augmentation System - LAC Location Area Code - LACAC Latin American Civil Aviation Commission - LADAR Laser Radar - LADGPS Local Area Differential GPS - LAGPS Local Area Global Positioning System - LAHSO Land And Hold Short Operation - LAIRCM Large Aircraft Infrared Countermeasure - LAN Local Area Network - LANTIRN Low-Altitude Navigation And Targeting Infrared For Night - LAPB Link Access Protocol, Balanced - LASER Light Amplification By Simulated Emission Of Radiation - LAT Latitude - LBA Luftfahrt-Bundesamt (Germany) - LBP L-Band Physical - LCA Layered Component Architecture - LCC Leadless Chip Carrier - LCC Life Cycle Cost - LCC Low-Cost Carrier - LCD Liquid Crystal Display - LCF Link Control Field - LCI Logical Channel Identifier - LCN Local Communications Network - LCP Lighting Control Panel - LCR Link Connection Refusal - LDA Landing Directional Aid - LDA Laterally Displaced Approach - LDCC Leaded Chip Carrier - LDCS Local Departure Control System - LDGPS Local Area Differential Global Positioning Satellite - LDOC Long Distance Operational Control - LDRCL Low Density Radio-Communications Link - LDU Lamp Driver Unit - LE Link Establish - LED Light-Emitting Diode - LEO Low Earth Orbiting - LEO Low Earth Orbit - LF Low Frequency - LFE Lead-Free Electronics - LFR Lf Radio Range - LGA Low Gain Antenna - LGB Laser-Guided Bomb - LHP Lighting Hirf Protection - LHT Lufthansa Technik Ag - LIDAR Light Detection And Ranging - LIMNATRAN Limited North Atlantic Regional Air Navigation - LINCS Long-Haul/Leased Interfacility National Airspace Communications System - LISN Line Impedance Stabilization Network - LL L-Band Link - LLC Logical Link Control - LLLTV Low-Light-Level Television - LLWAS Low-Level Wind Shear Alert System - LME Link Management Entity - LMI Logical Management Interface - LMM Locator Middle Marker - LMT Local Mean Time - LNA Low-Noise Amplifier - LNAV Lateral Navigation - LOB Left Outboard - LOC Localizer/Location - LOM Locator Outer Marker - LON Longitude - LORAN Long-Range Air Navigation - LOS Line Of Sight - LOX Liquid Oxygen - LPB Loss Prevention Bulletin - LPC Low Pressure Compressor - LPDU Link Protocol Data Unit - LPT Low Pressure Turbine - LRC Long-Range Cruise - LRM Line Replaceable Module - LRR Long-Range Radar - LRU Line Replaceable Unit - LSAS Longitudinal Stability Augmentation System - LSB Least Significant Bit - LSB Lower Sideband - LSD Least Significant Digit - LS-DSAD Low Speed Frame Relay Service Access Device - LS-FRAD Low Speed Frame Relay Access Device - LSI Large Scale Integration - LSK Line Select Key - LSN Local Subnetwork - LSP Link State Pdu - LSS Lightening Sensor System - LTA Lighter Than Air - LTC Lowest Two-Way Channel - LV Lower Sideband Voice - LVC Low Visibility Conditions - LVDT Linear Voltage Differential Transducer - LVL Level - LVP Low Visibility Procedures - LVPS Low Voltage Power Supply - LVTs Low Volume Terminals - LWF Lightweight Fighter - M Mach Number - m Mu-Viscosity; Micro (One Millionth = 1/10^6 ) - M&S Merging & Spacing - M/ASI Mach/Airspeed Indicator - M2K Mobility 2000 - MA Message Assurance - MAA Maximum Authorized Ifr Altitude - MAC Medium Access Controller - MACC Military Area Control Center - MACS Multiple Access Communication System - MAD Magnetic Anomaly Detection (Finds Submarines) - MAD Mutually Assured Destruction - MADARS Malfunction Detection, Analysis And Recording System - MAHWP Missed Approach Holding Waypoint - MALDT Mean Administrative And Logistics Delay Time - MALE Medium-Altitude, Long-Endurance - MAN Metropolitan Area Network - MANPADS Man Portable Air Defense System - MAP Missed Approach - MAP Missed Alert Parameter - MAP Missed Approach Procedure - MAP Monitor Alert Parameter - MAP Mobile Application Part - MAPt Missed Approach Point - MAR Mobile Access Router - MARSA Military Assumes Responsibility For Separation - MASPS Minimum Aviation System Performance Standards - MAST Multiaircraft Simulation Terminal - MAT Maintenance Access Terminal - MAV Micro Air Vehicle - MAWP Missed Approached Waypoint - MAX Maximum - mb Millibars - MB Marker Beacon - MBE Multiple Bit Error - MBER Minimum Bit Error Rate - MBPS Megabytes Per Second - MC Master Change - MCA Minimum Crossing Altitude - MCB Microwave Circuit Board - MCC Maintenance Control Computer - MCDP Maintenance Control Display Panel - MCDU Multifunctional Control Display Unit - MCI Mode C Intruder - MCN Manufacturing Control Number - MCOS Multi-Computing Operating System - MCP Maintenance Control Panel - MCP Mode Control Panel - Mcr Critical Mach Number - MCT Max Continuous Thrust - MCU Modular Concept Unit - MCU Multifunction Concept Unit - MDA Minimum Descent Altitude - MDA Missile Defense Agency - MDAH Minimum Descent Altitude/Height - MDAO Multidisciplinary Design, Analysis, & Optimization - MDAU Maintenance Data Acquisition Unit - MDC Maintenance Diagnostic Computer - MDCRS Meteorological Data Collection And Reporting Service - MDD Mission Data Debrief - Mdd Drag Divergent Mach Number - MDL Multipurpose Data Link - MDO Multidisciplinary Optimization Or Multidisciplinary Design Optimization - MDR Mode Digital Radio - MDS Minimum Discernible Signal - MDT Maintenance Display Terminal - MDT Mean Downtime - MEA Minimum En Route Altitude - MEC Main Equipment Center - MECO Main Engine Cut Off (Shutdown) - MEL Minimum Equipment List - MEO Medium Earth Orbit - MEOT Multiple-Expert Opinion Team - MES Main Engine Start - MET Meteorology - METAR Meteorological Aviation Routine Weather Report - MF Medium Frequency - MFCP Multifunction Control Display Panel - MFD Multifunction Display - MFDS Malfunction Display System - MFDU Malfunction Display Unit - MFDUA Miscellaneous Flight Data Acquisition Units - MFIT Mean Fault Isolation Time - MFM Maintenance Fault Memory - MGR Manager - MGSCU Main Gear Steering Control Unit - MHD Magnetic Hard Drive - MHD Multi-Hazard Display - MHRS Magnetic Heading Reference System - MHS Message Handling Service - MHz Megahertz - MIB Management Information Base - MIC Microphone - MicroEARTS Micro En Route Automated Radar Tracking System - MIDS Multifunction Information Distribution System - MIDU Multi-Purpose Interactive Display Unit - MILAERO Military/Aeronautical - MILS Multiple Independent Levels Of Security - MILSPEC Military Specification - MIL-STD Military Standard - MIMO Multi-Input/Multi-Output - MIN Minimum/Minute - MIPS Management Interface Protocol Specification - MIPS Million Instructions Per Second - MKR Marker - MLA Maneuver Limited Altitude - MLM Mid-Level Management - MLS Microwave Landing System - MLW Maximum Landing Weight - MM Mass Memory - MM Middle Marker (Glideslope) - MM Mobility Management - MMI Man-Machine Interface - MMIC Monolithic Microwave Integrated Circuit - MMR Multimode Receiver - MMS Maintenance Management System - MMSI Miniature Munitions System Interface - MMU Memory Management Unit - MMW Millimeter Wave - MNCID Management Network Category Interaction Diagram - MNPS Minimum Navigation Performance Specification - MNS Managed Network Service - MO Managed Object - MO Magneto-Optical - MOA Memorandum Of Agreement - MOA Military Operation Area - MOCA Minimum Obstacle Clearance Altitude - MOD Modification - MOD Magneto-Optical Drive - MODEM Modulator/Demodulator - MOPR Minimum Operational Performance Requirements - MOPS Minimum Operational Performance Standards - MOQA Maintenance Operations Quality Assurance - MORA Minimum Off-Route Altitude - MOS Metal Oxide Semiconductor - MOSA Modular Open Systems Approach - MOU Memorandum Of Understanding - MOU Memorandum of Understanding - MOV Metal Oxide Varsitor - MPAR Multipurpose Airport Radar - MPCU Multiport Protocol Converter Unit - MPDS Mobile Packet Data Service - MPEG-3 Moving Picture Expert Group - MPEL Maximum Permissible Exposure Level - MPM Microwave Power Module - MPP Materials, Processes And Parts - MPS Maintenance Processor System/ Subsystem - MRA Minimum Reception Altitude - MRF Multirole Fighter (Jsf/F-35 Predecessor Program) - MRR Manufacturing Revision Request - MRT Mean Repair Time - MRT Multi-Remote Terminal - Ms Millisecond - MS Milestone - MSB Most Significant Bit - MSC Member Services Center - MSC Message Sequence Chart - MSC Mobile Switching Center - MSC-MS Mobile Switching Center to Mobile Subscriber - MSCP Mobile Satellite Service Provider - MSD Mass Storage Device - MSG Message - MSI Medium Scale Integration - MSISDN Mobile Station Individual Subscriber Director y Number - MSK Minimum Shift Keying - MSL Mean Sea Level - M-SNDCF Mobile-Subnetwork Dependent Convergence Function - MSP Mode S Specific Protocol - MSS Mobile Satellite Service - MSSR Monopulse Secondary Surveillance Radar - MSSS Mode S Specific Services - MSU Mode Select Unit - MT Minimum Time - MTA Message Transfer Agent - MTBF Mean Time Between Failure - MTBO Mean Time Between Outages - MTBR Mean Time Between Removal/Repairs - MTBUR Mean Time Between Unscheduled Removal - MTBUR Mean Time Between Unit Replacements - MTC Maintenance Terminal Cabinet - MTD Maintenance Terminal Display - MTD Message Termination Devices - MTF Maintenance Terminal Function - MTI Moving Target Indicator - MTI Moving Target Indicator - MTM Module Test And Maintenance - MTMBIU Mtm Bus Interface Unit - MTOW Maximum Takeoff Weight - MTR Military Training Route - MTSAT Multifunction Transport Satellite - MTTDA Mean Time To Dispatch Alert - MTTF Mean Time To Failure - MTTM Mean Time To Maintenance - MTTMA Mean Time To Maintenance Alert - MTTR Mean Time To Repair - MTTR Mean Time To Repair - MTTRS Mean Time To Restore Service - MTTUR Mean Time To Unscheduled Removal - MU Management Unit - MUE Modernized User Equipment - MUS Minimum Use Specification - MUSE Multi-User System Environment - MUX Multiplexer - mV Millivolts - MWARA Major World Air Route Area - MWP Meteorological Weather Processor - MWS Missile Warning System - MXU Multiplexed Unit - MZFW Maximum Zero Fuel Weight - n Load Factor - N/A Not Applicable - N1 Fan Speed - N2 Intermediate Compressor Speed - N3 High-Speed Compressor - NACA National Advisory Committee For Aeronautics - NADIN National Airspace Data Interchange Network - NADIN Ii Nadin Packet Switch - NAILS National Airspace Integrated Logistics Support - NAK Negative Acknowledgment - NAPRS National Airspace Performance Reporting System - NAS National Airspace System (FAA) - NAS National Aircraft Standard - NAS Naval Air Station - NASA National Aeronautics And Space Administration - NASDAC National Aviation Safety Data Analysis Center - NASPALS National Airspace System Precision Approach And Landing System - NASTRAN Nasa Structural Analysis - NAT North Atlantic Region - NAT North Atlantic Tracks - NAT Tfg Nat Traffic Forecasting Group - NAT/NAM/PAC North Atlantic/North American/Pacific - NATA National Air Transport Association Inc. - NATCA National Air Traffic Controllers Association - NATS National Air Traffic Services (Uk) - NATS North Atlantic Track System - NAV Navigation - NAVAID Navigational Aid - NavAir Naval Air Systems Command - NAVSAT Navigation Satellite - NavSea Naval Sea Systems Command - NBAA National Business Aviation Association - NC Numerically Controlled - NCAR National Center For Atmospheric Research - NCATT National Center For Aircraft Technician Training - NCD No Computed Data - NCI Not Currently Implemented - NCOW Net-Centric Operations And Warfare - NCP Nas Change Proposal - NCS Network Control System - NCS Network Coordination Station - ND Navigation Display - NDB Navigation Data Base - NDB Non-Directional Radio Beacon - NDI Nondestructive Inspection - NDI Non-Developmental Item - NE Network Element - NEAN North European Ads Network - NEAP North European Cns/Atm Application Project - NELS Northwest European Loran System - NEMA National Electrical Manufacturers Association - NESACC North, East & Southern Area Control Centers For China - NESDIS National Environmental Satellite Data And Information Service - NET Network Entity Title - NEXCOM Next Generation Air/Ground Communications System - NEXRAD Next-Generation Weather Radar - NFF No Fault Found - NFS Network File Server - NGATS Next Generation Air Transportation System - NIAC Nas Information Architecture Committee (FAA) - NIC New Installation Concepts - NICE Nat Implementation Management Group Cost Effectiveness - NICE Network Integrated Cabin Equipment - NICs Network Interface Controllers - NIH Not Invented Here - NIMA National Imagery And Mapping Agency - NIMS Nas Infrastructure Management System - NIP Network Interface Processor - NIR Network Interface Router - NIRV Network Interface Router VDL - NIS Not In Service - NISC Nas Information Security Coordination - NIST National Institute Of Standards And Technology - NITA New Information Technologies In Aviation - NIU North American Isdn User Forum (Nist) - NL Network Layer - NLM Network Loadable Module - NLP Network Layer Protocol - NLR Netherlands National Aerospace Laboratory - NM Network Management - NM Nautical Mile - NMC National Meteorological Center - NMCCD Network Management Category Class Diagram - NMCD Network Management Category Diagram - NMF Network Management Function - NMIRS Network Management Interface Requirements Specification - NMP Network Management Plan - NMS Network Management System - NMS Navigation Management System - NMSP New Mexico State Police - NO Com No Communication - NOAA National Oceanic And Atmospheric Administration - NOC Network Operations Center - NOC Note Of Change - NOCAR North Atlantic Oceanic Concept And Requirements - NOCC National Operational Control Center - NOI Notice Of Inquiry (Fcc) - NOPAC North Pacific - NORAD North American Aerospace Defense Command - NOTAM Notice To Airmen - NOTAR No Tail Rotor - NOTUS Notice To Users (ARINC) - NPA Non-Precision Approach - NPDU Network Protocol Data Unit - NPIAS National Plan For Integrated Airport Systems - NPR National Performance Review - NPRM Notice Of Proposed Rule Making - NPV Net Present Value - NR Network Router - NRD Network Routing Domain - NRP National Route Program - NRZ Non-Return To Zero - NS Network Service - NSA National Security Agency - NSAP Network Service Access Point - NSC Network Service Center - NSDU Network Service Data Unit - NSEL Nsap Selection - NSEU Neutron Single Event Upset - NSSL National Severe Storms Laboratory - NTF No Trouble Found - NTIA National Telecommunications And Information Administration (U.S.) - NTSB National Transportation Safety Board - NTSM National Transportation Safety Board (U.S.) - NTST National Television Systems Committee - NUI Network User Identification - NUP Nean Update Program - NURBS Non-Uniform Rational B-Spline (Curve Equation For Cad) - NVCD Night Vision Cueing And Display - NVIS Night Vision Imaging Spectrometer - NVM Non-Volatile Memory - NVRAM Non-Volatile Ram - NWS National Weather Service (U.S.) - O&M Operations And Maintenance - O&S Operations And Support - OAC Oceanic Area Control Center - OAS Oceanic Automation System - OASIS Operational Area Satellite Information System - OASIS Operational And Supportability Implementation System - OASIS Organic Airborne And Surface Influence Sweep - OASYS Obstacle Avoidance System - OAT Operational Acceptance Test - OAT Outside Air Temperature - OATS Orbit And Attitude Tracking System - OBP Operational Build Plan - OBS Omnibearing Selector - OBS Optical Bypass Switch - OCA Oceanic Control Area - OCC Occasionally Connected Computing - OCC Operations Control Center - OCD Oceanic Clearance Delivery - OCIG Oceanic Communications Improvement Group - OCP Oceanic Clearance Processor - OCTAS Obstacle Cable And Terrain Avoidance System - ODA Open Document Architecture - ODAPS Oceanic Display And Planning System - ODIAC Operational Requirements For Atm Air/Ground Data Communications (Eurocontrol) - ODID Operational Display And Input Development - ODL Optical Data Link - ODL Oceanic Data Link - OEI One Engine Inoperative - OEM Original Equipment Manufacturer - OEP Operational Evolution Plan - OES Office Of Emergency Services - OEU Overhead Electronics Unit - OFDM Orthogonal Frequency Division Multiplexing - OFDPS Oceanic Flight Data Processing System - OFP Operational Flight Program - OGE Operational Ground Equipment - OHA Operational Hazard Assessment - OHU Overhead Unit (Hud) - OID Object Identifier - OIG Office Of Inspector General - OIT Onboard Information Terminal - OJT On-The-Job Training - OLAN Onboard Local Area Network - OLDI On-Line Data Interchange - OM Outer Marker - OMB Office Of Management And Budget - OMS Onboard Maintenance System - OMT Object Modeling Technique - OMTs Onboard Maintenance Terminals - ONR Office Of Naval Research (U.S.) - OOA Object-Oriented Analysis - OOD Object-Oriented Design - OODA Observe, Orient, Decide And Act - OOOI Out/Off/On/In - OPA Operational Performance Assessment - OPAS Overhead Panel ARINC 629 System - OPBC Overhead Panel Bus Controller - OPS Operations - OPS Ops Per Second - OPSPECS Ops Specifications - OPU Overspeed Protection Unit - O-QAR Optical Quick Access Recorder - OR Operational Requirements - ORB Object Request Broker - ORD Operations Readiness Demonstration - ORD Operational Requirements Document - OS Operating System - OS Open Service - OSA Operational Safety Assessment - OSCAR Orbiting Satellite Carrying Amateur Radio - OSDS Oceanic Systems Development Support - OSE Open Systems Environment - OSED Operational Service And Environment Definition - OSEIC Operational Service And Environment Information Capture - OSI Open Systems Interface/ Interconnection - OSIE Osi Environment - OSI-RM Osi Reference Model - OSJTF Open Systems Joint Task Force - OSPF Open Shortest Path First - OSR Order Status Report - OT&E Operational Test And Evaluation - OTA Office Of Technology Assessment (U.S.) - OTFP Operational Traffic Flow Planning - OTH Over The Horizon - OTP Office Of Telecommunications Policy (U.S.) - OTS Off The Shelf - OVHT Overheat - p Pi- 3.141592653589793... - P Pi-Product Operator - P&L Profit And Loss - P/F Poll/Final - P/RST Press To Reset - P2FEP Petal-Ii Front-End Processor - P3 I Preplanned Product Improvements - PA Passenger Address - PA Power Amplifier - PABX Private Automatic Branch Exchange - PAC Path Attenuation Compensation - PACIS Passenger Address And Communication Interphone System - PAD Packet Assembler-Disassembler - PAL Programmable Array Logic - PAM Pulse Amplitude Modulation - PAMRI Peripheral Adapter Module Replacement Item - PANS-OPS Procedures For Air Navigation Services-Aircraft Operations - PAPD Precise And Accurate Positioning Device - PAR Precision Approach Radar - PAT Process Action Team - PATS Portable Avionics Test Solution - PAU Passenger Address Unit - PAVES Programmable Audio Video Entertainment System - PAWES Performance Assessment And Workload Evaluation - PAX Passenger - PBD Place Bearing/Distance (Waypoint) - PBID Post Burn-In Data - PBX Public/Private Branch Exchange - PC Printed Circuit - PC Personal Computer - PCA Physical Configuration Audit - PCB Printed Circuit Board - PCC Pilot Controller Communication - PCD Panoramic Cockpit Display - PCI Peripheral Component Interface (32-Bit Local Bus) - PCI Protocol Control Information - PCM Pulse Code Modulation - PCMIA Personal Computer Memory Card Interface Association - PCO Protocol Converter Unit - P-Code GPS Precision Code - PCU Program Coordination Office - PCU Passenger Control Unit - PCU Personal Control Unit - PCU Power Control Unit - PD Profile Descent - PDA Personal Digital Assistant - PDB Performance Data Base - PDC Pre-Departure Clearance - PDCU Panel Data Concentrator Unit - PDD Package Design Document - PDDI Product Definition Data Interface - PDF Primary Display Function - PDL Program Design Language - PDM Predefined Controller Text Message - PDM Project Development Manager - P-DME Precision Dme - PDN Public Data Network - PDOP Position Dilution Of Precision - PDR Preliminary Design Review - PDS Persistent Data Storage - PDS Primary Display System - PDT Product Development Team - PDU Protocol Data Unit - PE Precision Engagement - PECT Peer Entity Contact Table - PED Portable Electronic Device - PER Packed Encoding Rule - PERT Program Evaluation And Review Technique - PETAL Preliminary Eurcontrol Test Of Air/Ground Data Link - PF Power Factor - PF Pilot Flying - pFAST Passive Final Approach Spacing Tool - PFC Primary Flight Computer - PFCS Primary Flight Control System - PFD Primary Flight Display - PHARE Program For Harmonized Atm Research In Europe (Eurocontrol) - PHI Petroleum Helicopters Inc. - PHY Physical - PI Parameter Identifier - PIA Performance, Integrity And Availability - PICS Protocol Implementation Conformance Statements - PID Parameter Identifier - PID Pilot Information Display - PID Primitive Identifier - PID Process Id - PIM Programmable Infosec Module - PIP Product Improvement Program - PIREP Pilot Report - PL Parameter Length - PL Project Leader - PLA Power Lever Angle - PLB Personal Locator Beacon - PLBTs Personal Locator Beacon And Voice Transceivers - PM Program Manager - PM Phase Modulation - PMA Parts Manufacturer Approval - PMA Parts Manufacturer Authority - PMA Permanent Magnet Alternator - PMAT Portable Maintenance Access Terminal - PMC Provisional Memory Cover - PMC Pci Mezzanine Card - PMG Permanent Magnet Generator - PMOS P-Type Metal Oxide Semiconductor - PMP Project/Program Management Plan - PMS Performance Management System - PN Pseudo Noise - PNCS Performance Navigation Computer System - PND Primary Navigation Display - PNF Pilot Not Flying - PNR Point Of No Return - PO Part Of - POA Plain Old ACARS - POC Point Of Contact - POC Proof Of Concept - POCC Project Operations Control Center - POH Pilot'S Operating Handbook - POM Program Objective Memorandum - POP Point Of Presence - POR Pacific Ocean Region - POSIX Portable Operating System Interface - POTS Plain Old Telephone System/Service - PPA Production Preparation Agreement - PPDU Physical Layer Protocol Data Unit - PPI Planned Position Indicator - PPL Processor-To-Processor Link - PPM Pulse Position Modulation - PPM Pages Per Minute - PPM Parts Per Million - PPP Point-To-Point Protocol - PPPI Pre-Planned Product Improvement ("P-Cubed I") - PPS Packets Per Second - PPS Pulse Per Second - PPS Precise Positioning Service - PRAIM Predictive Raim - pre-preg Pre-Impregnated (Composite Materials) - PRF Pulse Repetition Frequency - PRI Primary Rate Interface - PRM Precision Runway Monitor - PRN Pseudo Random Noise - P-RNAV Precision Area Navigation - ProE Pro/Engineer (High-End Cad System) - PROM Programmable Rom - PRS Public Regulated Service - PRSOV Pressure Regulating And Shutoff Valve - PS Power Supply - PSA Ps Assembly - PSD Port Sharing Device - PSDN Packet Switched Data Network - PSE Packet-Switching Exchange - PSEU Proximity Sensor Electronic Unit - PSFD Power Spectral Flux Density - PSL Projected Service Life - PSL/PSA Problem Statement Language/ Problem Statement Analyzer - PSM Power Supply Modules - PSN Packet Switching Network - PSPL Preferred Standard Parts List - PSR Primary Surveillance Radar - PSS Proximity Sensor System - PSSA Preliminary System Safety Assessment - PSTN Public Switched Telephone Network - PSU Passenger Service Unit - PT Plane Talk - PT Total Pressure - PTAN Precision Terrain Aided Navigation - PTD Performance Test Domain - PTI Packet Type Identifier - PTM Peripheral Transition Module (I/O Interface For Sbc) - PTR Production Test Requirements - PTS Problem Tracking System - PTSD Production Test Specification Document - PTT Push To Talk - PTU Power Transfer Unit - PV Parameter Value - PV Photovoltaic - PVC Permanent Virtual Circuit - PVD Plan View Display - PVT Position, Velocity, Time - PWM Pulse-Width Modulation - PWR Power - PXI Pci Extensions For Instrumentation - q Dynamic Pressure (Of Air) - QA Quality Assurance - QAP Qa Plan - QAR Quick Access Recorder - QDR Quality Defect Report - QDR Quality Deficiency Report - QEC Quadrantral Error Corrector - QFD Quality Function Deployment - QFE Field Elevation Pressure - QM Quality Management - QMP Qm Plan - QMS Qm System - QNH Sea Level Pressure - QNT Quint Networking Technology - QOP Quality Operating Procedures - QOS Quality Of Service - QP Quality Procedure - QPSK Quaternary Phase Shift Keying - QRH Quick Reference Handbook - QT Qualification Test - QVL Qualified Vendor List - r (rho) Air Density - R&D Research And Development - R&M Reliability And Maintainability - R/W Read/Write - RA Radio Altitude - RA Resolution Advisories - RA Routing Area - RAA Regional Airline Association - RAAF Royal Australian Air Force - RAAS Runway Awareness And Advisory System - RAC-GAT Russian/American Coordinating Group For Air Traffic Control - RACs Runway Analysis Charts - RAD Rapid Application Development - RAE Royal Aircraft Establishment (Farnborough) - RAF Requirements Analysis Folder - RAF Royal Air Force (Uk) - RAI Radio Altimeter Indicator - RAIM Receiver Autonomous Integrity Monitoring - RALA Request Automatic Line Adapter - RALT Radar Altimeter - RAM Random Access Memory - RAMICS Rapid Airborne Mine Clearance System - RAND Rand Corp. -Research And Development (Think-Tank For Usaf) - RAP Required Automation Performance - RATMP Required Air Traffic Management Performance - RATO Rocket-Assisted Take-Off - RC&W Rack Connectors And Wiring - RCAG Remote Control Air-To-Ground - RCAT Re-Configurable Cockpit And Avionics Testbed - RCD Radar Cable Detection - RCE Radio Control Equipment - RCF Required Communications Performance - RCL Radio Communications Link - RCO Remote Communications Outlet - RCP Radio Control Panel - RCR Routing And Circuit Restoral - RCS Radar Cross Section - RCS Reaction Control System (Small Thrusters For Control) - RCSU Romote Control And Status Unit - RCU Radio Control Unit - RCU Remote Control Unit - RD (Taxi) Route Deviation - RD Routing Domain - RDARA Regional Domestic Air Route Area - RDC Routing Domain Confederation - RDDMI Radio Digital Distance Magnetic Indicator - RDF Rd Format - RDI Radio Direction Indicator - RDI Rd Identifier - RDP Radar Data Processing - RDR Radar - RDS Raymer'S Design System (Aircraft Design Software) - RDSS Radio Determination Satellite System - RDT&E Research, Development, Test, And Evaluation - RE&D Research, Engineering And Development - REA Radar Electronics Assembly - Recce Reconnaissance - Recon Reconnaissance - REDAC Research, Engineering And Development Advisory Committee (FAA) - REP Required Environmental Performance - REQ Request - RER Residual Error Rate - RERB Reliability Enhancement And Re-Engining Program - REVS Radar-Enhanced Vision System - RF Radio Frequency - RFC Request For Comments - RFG Requirement Focus Group - RFI Radio Frequency Interference - RFI Request For Information - RFO Request For Offer - RFP Request For Proposal - RFQ Request For Quote - RFU Radio Frequency Unit - RGB Red Green Blue - RGCSP Review Of The General Concept Of Separation Panel (ICAO) - RGS Relay Ground Station - RH Radio Handler - RHF Ridiculously High Frequency - RHO Response On Handoff - RHSM Reduced Horizontal Separation Minima - RI Runway Incursion - RIB Routing Information Base - RIN Royal Institute Of Navigation (Uk) - RIP Routing Information Protocol - RISC Reduced Instruction Set Computer - RLE Response On Link Establishment - RLG Ring Laser Gyro - RLS Reliable Link Service - RM Regional Manager - RM&A Reliability, Maintainability And Availability - RMCDE Radar Message Conversion And Distribution Equipment - RMI Radio Magnetic Indicator - RMMS Remote Maintenance Monitoring System - RMP Risk Management Plan - RMS Risk Management System - RMS Root Mean Square - RNAV Area Navigation - RNP Required Navigation Performance - RNP Required Navigational Performance - RNR Receive Not Ready - RO Radio Operator - ROA Recognized Operating Agency - ROC Rate Of Climb - ROC Rest Of Operational Capability - ROD Rate Of Descent - ROIP Radio Over Internet Protocol - ROM Read Only Memory - ROM Rough Order Of Magnitude - RON Remain Over Night - RP Routing Protocol - RP Rocket Propellant (Kerosene-Based Fuel) - RPDE Rapid Preliminary Development Effort - RPGs Rocket-Propelled Grenades - RPM Revolutions Per Minute - RPOA Recognized Private Operation Agency (Ccitt) - RPV Remote-Piloted Vehicle - RPZ Ramensky Priborostroitelny Zavod (Russian Avionics Manufacturer) - RR Receive Ready - RRI Router Reference Implementation - RSDP Reliable Sequencing Delivery-Confirmation Protocol - RSN Regional Sub-Network - RSP Required Surveillance Performance - RSSI Received Signal Strength Indicator - RT Radio Telecommunication - RTA Required Time Of Arrival - RTC Red Time Clock - RTCA Radio Technical Commission For Aeronautics - RTCM Radio Technical Commission For Maritime Services - RTK Real-Time Kinematic - RTM Radio Transmission Module - RTO Rejected Takeoff - RTOS Real Time Operating System - RTR Remote Transmitter Receiver Site - RTS Request To Send - RTSP Required Total System Performance - RTTI Run-Time Type Identification - RTU Radio Tuning Unit - RU Rack Unit (1 Inch) - RVP Required Vision Performance - RVR Runway Visual Range - RVSM Reduced Vertical Separation Minimum - RWM R/W Memory - RWP Required Weather Performance - RWR Radar Warning Receiver - RX Receiver - RZ Return To Zero - s Sigma-Unit Stress; Air Density Ratio - S Sigma-Summation Operator - S&A Sense-And-Avoid - S&C Stability And Control - S0 Segment 0 - S1 Segment 1 - SA Selective Availability - SA Situational Awareness - SAAAR Special Aircraft And Aircrew Authorization Required - SAASM Selective Availability/Anti- Spoofing Module - SAASM/EGI Saasm/Embedded GPS Inertial System - SABENA Societe Anonyme Belge D'Exploitation De La Navigation Aerienne - SABM Set Asynchronous Balanced Mode - SAD Software Architecture Document - SADT Software Architecture Design Team - SAE Society Of Automotive Engineers - SAFIR Systems Aid For Integration And Fault Reporting - SAI System Architecture And Interfaces - SAI System Architecture And Interfaces Subcommittee (Aeec) - SAM Slot Allocation Management - SAM South American Region - SAM Surface-To-Air Missile - SAMM Surface Area Movement Management - SAMPE Society For The Advancement Of Materials And Process Equipment - SAP Service Access Points - SAPPHIRE Satellite And Aircraft Database Program For System Integrity Research - SAR Search And Rescue - SAR Synthetic Aperture Radar - SARPS Standards And Recommended Practices (ICAO) - SARS Severe Acute Respiratory Syndrome - SAS Scandinavian Airlines System - SAS Stability Augmentation System - SAS Station Address Set - SASS Surveillance Analysis Support System (Eurocontrol) - SAT Static Air Temperature - SAT Systems And Acceptance Testing - SATCOM Satellite Communications - SATNAV Satellite Navigation - SB Service Bulletin - SBAS Satellite-Based Augmentation System - SBC Single Board Computer - SBD Schematic Block Diagram - SBD Short Data Burst - SC Special Committee (Rtca) - SC202 Special Committee 202 - SCA Self-Contained Approaches - SCA Software Communications Architecture - SCAP Standard Computerized Airplane Performance - SCAT Special Category - SCCI System Controller And Cockpit Indicator - SCD System Category Diagram - SCE Super-Conducting Electronics - SCPC Single Carrier Per Channel - SCSI Small Computer System Interface - SD Secure Digital - SD&D System Development And Demonstration - SDD System/Software Design Document - SDD System Development And Demonstration - SDDN Software-Defined Data Network - SDF Software Development Folder - SDI Source Destination Identifier - SDI Strategic Defense Initiative - SDL Software Data Loader - SDLC Synchronous Data Link Control - SDM Software Development Methodology - SDP Software Development Plan - SDR Software Defined Radio - SDR System Design Review - SDRAM Synchronous Dynamic Random Access Memory - SDRs Software-Defined Radios - SDU Satellite Data Unit - SE Systems Engineering - SEAD Suppression Of Enemy Air Defenses - SEC Aircraft Information Security - SEC Software Enabled Control - SECAM Sequential Color With Memory - SEI Software Engineering Institute - SEL Select Identifier - SELCAL Selective Calling - SEMP System Engineering Management Plan - SESAR Single European Sky Air Traffic Management Research - SETA System Engineering And Technical Assistance (Contractor) - SE-Vision Synthetic-Enhanced Vision - SEWG Security Working Group - SFAR Special Federal Regulation - SFC Specific Fuel Consumption - SFDF Subsystem Fault Detection Function - SFE Supplier (Or Seller)-Furnished Equipment - SFT Software Fault Tolerance - SHM Structural Health Monitoring - SI&T Software Integration And Test - SIA Singapore Airlines - SICAS Secondary Surveillance Radar Improvements And Collision Avoidance Systems - SICASP Sicas Panel (ICAO) - SID Standard Instrument Departure - SIGINT Signals Intelligence - SIGMET Significant Meteorological Information - SIM Subscriber Identity Module - SINCGARS Single-Channel Ground And Airborne Radio System - SISG Systems Implementation Subgroup (Iata) - SIT System Integration And Test - SITA Societe Internationale De Telecommunications Aeronautiques - SITD System Integration Test Description - SITP System Integration Test Plan - SITP/D Sitp/Description - SITR System Integration Test Report - SIU Server Interface Unit - SIWG Seat Integration - SKT Station-Keeping Technology - SL Sea Level - SLA Service Level Agreement - SLAM Standoff Land Attack Missile - SLC Synchronous Link Control - SLH System Level Health - SLI System Level Interface - SLM Standard Length Message - SLoC Source Lines Of Code - SLS Satellite Landing System - SLUC System Level Use Case - SLV Service Level Verifier - SM Systems Management - SMA Surface Movement Advisor - SMART Standard Modular Avionics Repair And Test - SMB Serial Mezzanine Board - SMD Surface Mount Device - SMDS Switch Multimegabit Data Service - SME System Management Entity - SMGCS Surface Movement Guidance And Control Systems - SMI Standard Message Identifier - SMR Simulator Maintainability And Reliability - SMR Specialized Mobile Radio - SMR Surface Movement Radar - SMS Short Messaging Service - SMS Spectrum Monitoring System - SMT Standard Message Text - SMU Sensor Management Unit - SMUG Stores Management Upgrade System - SN Subnetwork - SNA System Network Architecture - SNAC Sn Access - SNCR Sn Connection Reference - SNDCF Sn Dependent Convergence Function - SNDCF/P Sndcf/Protocol - SNICF Sn Independent Convergence Function - SNLE Sn Link Establishment - SNMP Simple Network Management Protocol - SNMPv1 Snmp Version 1 - SNPA Sn Point Of Attachment - SNPDU Sn Protocol Data Unit - SNR Signal-To-Noise Ratio - SNSDU Sn Service Data Unit - SOC System On A Chip - SOH Start Of Header - SOI System Operator Instructions - SOIA Simultaneous Offset Instrument Approach - SOIT Satellite Operational Implementation Team - SOM Software Operator Manual - SON Statement Of Operational Need - SOP Standard Operating Procedure - SOW Statement Of Work - SP Signal Processing - SPC Statistical Process Control - SPCR System Problem/Change Report - SPEAR System Performance Evaluation And Analysis Reporting - SPI Serial Peripheral Interface - SPI Single Process Initiative - SPICE Stans Preparation Integrator For Cns/Atm Environment (Eurocontrol) - SPM Software Programmer'S Manual - SPO System Program Office - SPR Safety And Performance Requirements - SPS Software Product Specification - SPS Standard Positioning Service - SPS Stratospheric Platform System - SPTF Spectrum Policy Task Force - SQ Service Quality - SQAP Software Quality Assurance Plan - SQB Sq/Billing Processor - SQD Sq Data - SQP Signal Quality Parameter - SRAM Static Random Access Memory - SRAM Short-Range Attack Missile - SREJ Selective Reject - SRM Selective Reject Mode - SRM Systematic Risk Management - SRR System/Software Requirements Review - SRS Software Requirements Specification - SRTM Shuttle Radar Topography Mission - SRU Shop Replaceable Unit - SSA Source Selection Activity - SSA System Safety Assessment - SSAC Source Selection Advisory Committee - SSAP Strategic Safety Action Plan - SSB Single Side Band - SSDD System/Segment Design Document - SSEB Source Selection Evaluation Board - SSOI Sidestick Order Indicator - SSR Secondary Surveillance Radar (ICAO/FAA) - SSS Surveillance Server System - SSS System/Segment Specification - SST Supersonic Transport - SSU Subsequent Signal Unit - STANAG Standardization Agreement - STANS Simulation For A Total Air Navigation System (Eurocontrol) - STAP Space-Time Adaptive Processing - STAR Standard Terminal Arrival Route - STARS Standard Terminal Automation Replacement System (FAA) - STB Systems Test Bed - STC Supplemental Type Certificate (FAA) - STCA Short-Term Traffic Advisory - STD Standard - STD System Technical Description - STDMA Self-Organized Time Division Multiple Access - STDMA Synchronized Time Division Multiple Access - STF Satcom Tracking Facility - STIU Satellite Telecommunications Intermediate Unit - STK Scandinavian Authorities - STM Serial Transition Module - STOL Short Take-Off And Landing - STOVL Short Take-Off/Vertical Landing - STP System Test Plan - STP/D Stp/Description - STR System Technical Report - STR System Test Report - STVS Small Tower Voice Switch - STX Start Of Text - SU Signal Unit - SUA Special Use Airspace - SUM Software User Manual - SUPPS Regional Supplementary Procedures - SUT System Under Test - SV Space Vehicle - SVC Switched Virtual Circuit - SvRR Service Readiness Review - SVS Synthetic Vision System - SVU Satellite Voice Unit - SW Software - SWIT Software Integration And Test - SWIT Switched Virtual Circuit - SWTP Software Technology Plan - SWTRR Software Test Readiness Review - SYS System Identifier - SYSCAT-B System Category-B (FAA Message Format) - SysCI System Configuration Item - SysDD System Design Document - T&E Test And Evaluation - T&M Time And Materials - T/W Thrust-To-Weight Ratio - TA Traffic Advisory (Tcas) - TAA Technical Advanced Aircraft - TAB Tab-Delimited Aircraft Data Table From Rds - TABI Tailorable Advanced Blanket Insulation (Tps) - TACAN Tactical Air Navigation - TAF Terminal Aerodrome Forecast - TAF Terminal Area Forecast (ICAO) - TAIC Transport Accident Investigation Commission - TAIS Total Airport Management System - TAMD Theater Air And Missile Defense - TAOARC Terminal Area Operations Aviation Rulemaking Committee (FAA) - TAP Tower Automation Program - TAR Trials Atn Router - TAS Traffic Advisory System - TAS True Airspeed - TASS Terminal Air Surveillance System - TAT Total Air Temperature - TAWS Terrain Avoidance Warning System - TC Transport Connection - TCA Terminal Control Area - TCAD Traffic Collision Alerting Device - TCAS Traffic Alert Collision Avoidance System - TCAS Ii Traffic Alert Collision Avoidance System Ii - TCDL Tactical Common Data Link - TCP Transmission Control Protocol - TCP/IP Tcp/Internet Protocol - TCS Tower Communications System - TD Technical Documentation - TDD Time Division Duplexed - TDF Training Device Facility Requirements - TDLS Tower Data Link Services (System) - TDM Time Division Multiplexer - TDMA Time Division Multiple Access - TDMA Time Division Multiple Access - TDOA Time Difference Of Arrival - TDST Tower Data Services Terminal - TDWR Terminal Doppler Weather Radar - TECOM Technical Committee - TEDS Transducer Electronic Data Sheet - TEI Text Element Identifiers - TELCO Telephone Company - TEN-T Trans-European Network - Tansport - TERCOM Terrain Contour Matching - TERPS Terminal En Route Procedures - TERPS Terminal Instrument Procedures (FAA) - TES Tactical Exploitation System - TES Trials End System (For Atn) - TESCOS Terminal Coordination System - TFC Traffic - TFM Traffic Flow Management - TFR Temporary Flight Restriction - TFR Terrain-Following Radar - TFTP Trivial File Transfer Protocol - TG Transmission Gate - TG4 Maximum Time Between Gsif'S Timer - TG5 Maximum Link Overlap Timer - TGT Target - TIA Telecommunications Industry Association - TIF Traffic Information File - TIP Tower Integrated Program - TIS Traffic Information Service - TIS Traffic Information System - TIS-B Traffic Information Service - Broadcast - TL Terminal Location (ACARS/Afeps) - TLS Target Level Of Safety - TM Timer-Media Access Control - TM Technical Manual - TM&O Telecommunications Management And Operations - TMA Traffic Management Advisor - TMC Traffic Management Coordinator - TMC Test, Monitor And Control - TMLLF Terrain Masking Low-Level Flight - TMMAC Tactical Airborne Moving Map Capability - TMSI Temporary Mobile Subscriber Identification - TMS-T Traffic Management System Transition - TMU Traffic Management Unit - TO Technical Order - TO/GA Take Off/Go Around - TOC Transfer Of Communications - TOFT Tactical Operational Flight Trainer - TOGW Takeoff Gross Weight - TOR Terms Of Reference (ICAO/FAA) - TOW Takeoff Weight - TP Test Point - TP4 Transport Protocol Class 4 - TPA Taxi Positional Awareness - TPAW Turbulence Prediction And Warning System - TPDU Transport Protocol Data Unit - T-PEDs Transmitting Portable Electronic Devices - TPF Transaction Processing Facility - TPL Terminal Permission List (ACARS/Afeps) - TPM Technical Performance Management - TPS Thermal Protection System (For Reentry) - TPUs Terminal Processing Units - TQM Total Quality Management - TQM Total Quality Management - TRACON Terminal Radar Approach Control - TRB Technical Review Board - TRD Transit Routing Domain - TRL Technology Readiness Level - TRNS Terrain Referenced Navigation System - TRR Test Readiness Review - TS Time Source - TS Transport Service - TSA Technical Services Agreement - TSA Transportation Security Administration - TSAP Transport Service Access Point - TSAs Temporary Segregated Areas - TSB Transportation Safety Board - TSC Term Service Commitment - TSC Transportation System Center - TSDPs Technical Support And Data Packages - TSDU Transport Service Data Unit - TSG Technical Subgroup - TSG Technical Standards And Guidelines - TSO Technical Standard Order (FAA) - TSP Transmitted Signal Power - TSPDs Technical Support And Data Packages - TSS Technology Support And Services - TSTM Time Source Transition Module - TT Test Tools - TT&C Tracking, Telemetry, and Command - TTG Time To Go - TTL Transistor-Transistor Logic - TTNT Tactical Targeting Networking Technology - TTP Time-Triggered Protocol - TTS Time To Station - TTW Time To Waypoint - TURB Turbulence - TVC Thrust Vector Control - TVE Total Vertical Error - TWDL Two-Way Data Link Communications - TWIP Terminal Weather Information For Pilots - TWP Technical Work Program - TX Transmit - UA Unmanned Aircraft - UA Unnumbered Acknowledgment - UART Universal Asynchronous Receiver Transmitter - UAS Unmanned Aircraft Systems - UAT Universal Access Transceiver - UAT Universal Access Transponder - UATP Universal Air Travel Plan - UAV Unmanned Or Uninhabited Aerial (Or Air) Vehicle - UBI Uplink Block Identifier - UCAV Unmanned Or Uninhabited Combat Air Vehicle - UCD Universal Cockpit Display - UCI User Computer Interface - UD User Data - UDF Unducted Fan - UDP User Datagram Protocol - UH Utility Helicopter - UHF Ultra-High Frequency - UI Unnumbered Information - UIR Upper Information Region - UL Uplink - ULV Ultra-Low Voltage - ULWG Upper Layer Working Group - UML Unified Modeling Language - UMTS Universal Mobile Telecommunications System - UP Universal Platform - UPRM Universal Platform Resource Management - UPS Uninterruptible Power Supply - UPS United Parcel Service - UPSMS Ups Management Supply - URET User Request Evaluation Tool - URL Universal Resource Locator - USB Universal Serial Bus - USC United States Code - USCG U.S. Coast Guard - UTC Universal Time Coordinated - UTP Unshielded Twisted Pair - UUT Unit Under Test - UV Ultraviolet - UWB Ultra Wide-Band - V Volt - V&V Verification And Validation - V/STOL Vertical/Short Take-Off And Landing - V/ULOS Versions Of The Havequick And VHF/UHF Line Of Sight - V1 Takeoff Decision Speed - V2 Takeoff Safety Speed - v8208 VDLM2 8208 Protocol - VAC Volts Alternating Current - VAGR VDLM2 Agr - VAMs Value-Added Manufacturers - VANS Value-Added Network Services - VAP Value-Added Processor - VAR Value-Added Reseller - VAS Value-Added Services - VASI Visual Approach Slope Indicator - VC Virtual Circuit - VCB Virtual Circuit Bridge - VCDU Video Control Display Unit - VCP Video Cassette Player - VCU VDL Control Unit - VDC Volts Direct Current - VDD Version Description Document - VDGS Visual Docking Guidance System - VDL VHF Data Link - VDL4 VHF Data Link Mode 4 - VDLM2 VDL Mode 2 - VDLM3 VDL Mode 3 - VDLM4 VDL Mode 4 - VDR VHF Data Radio - VDU Visual Display Unit - VEE Visual Engineering Environment - VER Version - VFD Virtual Flight Deck - VFR Visual Flight Rules - VG Variable Geometry - VG/DG Vertical Gyro/Directional Gyro - VGA Video Graphics Adapter - VGA Video Graphics Array - VGS VDLM2 Ground Station - VHF Very High Frequency - VHSIC Very High Speed Integrated Circuit - VIA Versatile Integrated Avionics - VIFF Vectoring In Forward Flight - VIP Verbal Intruder Positioning - VLR Visitor Location Register - VLSI Very Large Scale Integration - VMC Visual Meteorological Conditions - VMCs Vehicle Management Computers - VMD Video Motion Detection - VME Versa Module Eurocard Bus - VME VHF Management Entity (Vmebus) - VMECC Versa Module Eurocard Card Cage - VMON Vnms Health Monitoring - VMS Vehicle Management System - VNAV Vertical Navigation - VNE Never-Exceed Speed - VNMS VDLM2 Network Management System - VNO Maximum Structural Cruising Speed - VOCRAD Voice Radio - VOIP Voice Over Internet Protocol - VOR VHF Omni-Directional Radio Range - VPN Virtual Private Network - VPT Virtual Procedure Trainer - Vr 157 Knots - VR Rotation Speed - VREF Approach Reference Speed - VRG VDL Reference Guide - VSAT Very Small Aperture Terminal - VSCS Voice Switching And Control System - VSD VDL Specific Dte Address - VSM Vertical Separation Minimum - VSRS Voice Switch Replacement System - VSWR Voltage Standing Wave Radio - VTAM Virtual Telecommunications Access Method - VTAS Voice, Throttle And Stick - VTO Vertical Take-Off - VTOL Vertical Take-Off And Landing - VTS Vessel Traffic System - W/S Wing Loading - WAAS Wide Area Augmentation System - WACS Wireless Airport Communication System - WADGPS Wide Area Differential GPS - WAEA World Airline Entertainment Association - WAFC World Area Forecast Center - WAN Wide Area Network - WARC World Administrative Radio Conference - WARP Weather And Radar Processor - WAS Wide Area Search - WASP Wireless Access Service Point - WATRS West Atlantic Route Structure - WBS Weight Balance System - WBS Work Breakdown Structure - WC Waypoint Capture - WDM Web Data Manager - We Empty Weight - WG Working Group - WGS World Geodetic System - Wi-Fi Wireless Fidelity - WIG Wing In Ground-Effect - wilco Will Comply - WINN Weather Information Network - WIP Wide Area Augmentation System Integrity Panel - WIPPS Wide-Body Integrated Platform Protection System - WJHTC William J. Hughes Technical Center (FAA) - WLG Wireless Ground-Link - WMO World Meteorological Organization - WMSCR Weather Message Switching Center Replacement - WNW Wideband Networking Waveform - Wo Takeoff Gross Weight - WORM Write-Once/Read Many (Optical Disk Technology) - WP Work Procedure - WPR Waypoint Position Report - WPT Waypoint - WQAR Wireless Quick Access Recorder - WRC World Radiocommunication Conference - WRC World Radio Conference - WS Windshear - WSDDM Weather Support For Deicing Decision-Making - WSR Weather Surveillance Radar - WWG Wireless Working Group - WWW World Wide Web - WX Weather - WXR Weather Radar - X Cancel - XFR Transfer - XG Next Generation - XID Exchange Identification - XL-ETFE Cross-Linked Ethylene Tetraflourothylene - XMC Switched Fabric Mezzanine Card - XMIT Transmit - XMTR Transmitter - XPDR Transponder - XS Societe Internationale De Telecommunications Aeronautiques (SITA) - XTI X-Open Transport Interface - XTP Express Transfer Protocol - XTRA X-Ban Thin Radar Aperture - XWIND Crosswind - Z Zulu (Greenwich Mean Time) - ZFW Zero Fuel Weight - ZOC Zone Of Convergence - ZVF Zero Velocity Filter -