Avionics Magazine presents the third edition of our comprehensive Aerospace Acronym Guide. Since we started compiling the list in 2002, the number of acronyms and abbreviations has grown by 660 entries, from 2,306 to 2,966.
Though it is not an exhaustive list, we trust it will serve you well.
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IA interoperability assessment
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I&TE integration and test engineering
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IACSP international aeronautical communications service provider
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IAGS integrated ARINC ground station
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IANA Internet assigned number authority
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IAOA indicated angle of attack
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IAOPA International Council of Aircraft Owners and Pilots Association
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IAPA instrument approach procedures automation
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IAPS integrated avionics processing system
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IARP inverse address resolution protocol
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IAS indicated airspeed
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IAT investment analysis team
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IATA International Air Transport Association
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IBAC International Business Aviation Council
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IAC integrated avionics computer
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IATA International Air Transport Association
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IC integrated circuit
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IC intercabinet
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ICAO International Civil Aviation Organization
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ICARD ICAO five-letter name code & route designator system
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ICAP increased capability
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ICAP improved capability
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ICC IAPS card cage
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ICCAIA International Coordinating Council of Aerospace Industries Association
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ICD interface control document/drawing
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ICD interactive design center
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ICD installation control drawing
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ICM interline communications manual
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ICMP Internet control message protocol
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ICNIA integrated communications, navigation and identification avionics
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ICP integrated core processor
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ICS intercommunications system
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ICS interface control specification
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ICSS integrated communication switching system
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ICU integrated control unit
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ICU instrument comparator unit
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ID identifier/identification
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IDC internal diagnostic capabilities
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IDC indicator display/control
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IDD interface design document
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IDEN integrated digital enhanced network
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IDEO Innovation, Design Engineering Organization
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IDG integrated drive generator
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IDI initial domain identifier
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iDMU integrated data management unit
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IDIQ indefinite-delivery/indefinite quantity
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IDP initial domain part
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IDRP interdomain routing protocol
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IDS integrated display system
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IDS inter-domain system
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IDS ice detection system
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IDU interactive display unit
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IEC International Electrotechnical Commission
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IEC IAPS environmental control module
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IEC International Engineering Consortium
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IED insertion extraction device
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IEEE Institute of Electrical and Electronics Engineers
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IF intermediate frequency
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IFALPA International Federation of Airline Pilots Association
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IFASS integrated system for surveillance and radio transmission
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IFATCA International Federation of Air Traffic Controllers' Association
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IFC indicated final cost
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IFDL intraflight data link
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IFE in-flight entertainment
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IFF identification, friend or foe
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IFIS Integrated Flight Information System
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IFPS integrated initial flight plan processing system
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IFR instrument flight rules
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IFRB International Frequency Registration Board
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IGES intermediate ground earth station
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IGES standardized graphics exchange file
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IGIA Interagency Group on International Aviation
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IGV inlet guide vane
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IHAS integrated hazard avoidance system
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ILA International Law Association
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ILM independent landing monitor
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ILS instrument landing system
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ILSP integrated logistics support plan
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IMA integrated modular avionics
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IMC instrument meteorological conditions
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IMG implementation manager group
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IMU inertial measurement unit
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INCD integrated navigation, controls and displays system
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INFO information frame
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INAV interactive navigation
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IN.HG. inches of mercury
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INMARSAT International Maritime Satellite Organization
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INMS integrated network management system
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INS inertial navigation system
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INTELSAT International Telecommunications Satellite Organization
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InterNIC Internet Network Information Center
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Interop interoperability
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I/O input/output
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IOC initial operating capability
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ION Institute of Navigation
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IOR Indian Ocean region
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IOS Internet operating system
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IOT & E initial operational test and evaluation
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IP Internet protocol
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IPACG Informal Pacific ATC Coordination Group
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IPC interprocess communication
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IPC intermediate pressure compressor
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IPD industrial products division
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IPT integrated product team
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IPI initial protocol identifier
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IPL illustrated parts list
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IPR Internet protocol router
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IPS internet service providers
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IPT integrated product team
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IPT integrated project team
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IPT intermediate pressure turbine
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IR infrared
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IRAC Interdepartmental Radio Advisory Committee
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IR&D investment research and development
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IRIG-B inter-range instrumentation group-time code format B
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IRIS Iris Recognition Immigration System
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IRP integrated refuel panel
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IRR internal rate of return
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IRS inertial reference system
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IRS interface requirements specification
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IRU inertial reference unit
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IS intermediate system
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ISA industry standard architecture
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ISA Instrument Society of America
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ISC integrated systems controller
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ISDN integrated services digital network
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ISDOS information system design and optimization system
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ISDU inertial system display unit
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ISH intermediate system hello
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ISIS integrated sensor is structure
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ISLN isolation
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ISMS in-flight safety monitoring system
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ISO International Standards Organization
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ISO PA ISO protocol architecture
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ISP integrated switching panel
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ISP internet service providers
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ISR interrupt service routine
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ISS integrated surveillance system
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ISSN intermediate system sub-network
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ISSS initial sector suite system/subsystem
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ISU initial signal unit
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IT information technology
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ITAR International Traffic in Arms Regulations
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ITC in-trail climb
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ITD in-trail descent
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ITM IT management
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ITS integrated test system
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ITSE integrated test and support environment
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ITU International Telecommunications Union
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ITWS integrated terminal weather system
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IUPS internal uninterruptible power supply
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IV isolation valve
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IVSI instantaneous vertical speed indicator