| I²R | 
Imaging Infra-Red | 
| I | 
Inertial | 
| I | 
Invoice Card | 
| I/I | 
Inspection/Interval | 
| I/O | 
Input/Output | 
| I/P | 
Input | 
| I/P | 
Intercept Point | 
| I/P | 
Intercept Profile | 
| Irr.M | 
Irritating Material | 
| IADS | 
Integrated Air Defense System | 
| IAE | 
International Aero Engines | 
| IAF | 
Initial Approach Fix | 
| IAM | 
[UK] Institute of Aviation Medicine | 
| IAP | 
[USSR] Istrebitelnye Aviatsionnye Polki - Regiment d'aviation de chasse | 
| IAS | 
Indicated Airspeed | 
| IATA | 
International Air Transport Association | 
| IAW | 
In Accordance With | 
| IAWP | 
Initial Approach Waypoint | 
| IB | 
[USSR] Istrebitel Bombardirovschik - Chasseur bombardier | 
| IBN | 
Identification Beacon | 
| IC | 
Integrated Circuit | 
| IC | 
Invoice Control Card | 
| ICAO | 
International Civil Aviation Organisation | 
| ICBM | 
Intercontinental Ballistic Missile | 
| ICCAIA | 
Inter Co-ordinating Council of Aerospace Industries Association | 
| ICD | 
Interface Control Document | 
| ICE | 
In Circuit Emulation | 
| ICE | 
[Germany] Improved Combat Efficiency. Une mise à jour du F-4 Phantom II. | 
| Iceberg | 
[USA] Atterrissage à Okinawa.  | 
| Ichigo | 
[Japan] Operations en Chine du Sud, Mars 1944. | 
| ICNIA | 
[USA] Integrated Communication, Navigation and Identification Avionics. | 
| ICU | 
Isolation Control Unit | 
| ICY | 
Interchangeability | 
| ID | 
Identification | 
| ID | 
Inside Diameter | 
| ID PL | 
Identification Plate | 
| Ida | 
[USA] Nom de code des Tachikawa Ki.36 et Ki.55 | 
| IDC | 
Instrument Display Catalog | 
| IDENT | 
Identification, Identifier, Identify | 
| IDF | 
[Taiwan] Indigenous Defence Fighter, le Ching-Kuo. | 
| IDF | 
Instantaneous Direction Finder | 
| IDF/AF | 
[Israel] Israeli Defence Force / Air Force : Armée de l'Air Israélienne | 
| IDG | 
Integrated Drive Generator | 
| IDM | 
[USA] Improved Data Modem. Remplace ATHS. | 
| IDP | 
Integrated Data Processing | 
| IDS | 
Infra-Red Detection Set | 
| IDS | 
InterDictor / Strike. Version du Panavia Tornado | 
| IDU | 
Interactive Display Unit | 
| Ieshi la Wanachi la Tanzania | 
Armée de l'air populaire de Tanzanie | 
| IF | 
Initial Fix | 
| IF | 
Intermediate Frequency | 
| IFF | 
Identification Friend or Foe | 
| IFIS | 
[UK] Integrated Flight Instruments System | 
| IFP | 
In Flight Performance Computation Program | 
| IFR | 
Instrument Flight Rules | 
| IFR | 
In-Flight Refuelling | 
| IFREP | 
[UK] In-Flight Report | 
| IFS | 
[USA] USN:  Inshore Fire Support Ship | 
| IFTU | 
[UK] Intensive Flying Trials Unit | 
| IGB | 
Inlet Gear Box | 
| IGE | 
In Ground Effect : Le célèbre Effet de Sol. | 
| IGN | 
Ignition | 
| IGV | 
Inlet Guide Vane | 
| IHADSS | 
[USA] Integrated Helmet And Display Sighting System | 
| IHE | 
[USA] Improved High Explosive | 
| IHPTET | 
[USA] Integrated High-Performance Turbine Engine Technology | 
| IIPD | 
Illustrated Initial Provisioning Document | 
| IIR | 
Imaging Infra-Red | 
| ILLUM | 
Illumination | 
| ILLUMD | 
Illuminated | 
| Ilmailuvoimat | 
[Finland] Armée de l'Air - Créée en 1918. | 
| Ilmavoimat | 
[Finland] Armée de l'Air | 
| ILS | 
Instrument Landing System (LOC and G/S) | 
| IM | 
ILS Inner Marker | 
| IM | 
[USA] Intercept missile, par exemple un SAM | 
| IMC | 
Image Motion Compensation | 
| IMC | 
Instrument Meteorological Conditions | 
| IMC | 
Indirect Maintenance Cost | 
| IMI | 
[USA] Improved Manned Interceptor | 
| IMM | 
Immediate | 
| IMN | 
Indicated Mach Number | 
| IMT | 
[USA] Inflight Maintenance Technician. A bord des RC-135 pour les missions de longue durée. | 
| IMU | 
Inertial Measurement Unit | 
| IN | 
Inch | 
| IN HG | 
Inches of Mercury | 
| IN-LBS | 
Inch-Pounds | 
| INA | 
Initial Approach | 
| INAS | 
Integrated Navigation / Attack System | 
| INB | 
Inbound | 
| INBD | 
Inboard | 
| INCLG | 
Including | 
| INCR | 
Increase | 
| INCR | 
Increment | 
| IND | 
Indicator | 
| INDG | 
Indicating | 
| INEWS | 
[USA] Integrated Navigation / Electronic Warfare System | 
| INFO | 
Information | 
| INHI | 
Inhibit | 
| INHIB | 
Inhibit, Inhibited, Inhibition | 
| INIT | 
Initial(ization) | 
| INOP | 
Inoperative | 
| INP | 
Input | 
| INR | 
Inner | 
| INRTL | 
Inertial | 
| INS | 
Inertial Navigation System | 
| Insect | 
[UK] Livraison de Spitfire à Malte, 21 Juillet 1942. | 
| INSP | 
Inspection | 
| INST | 
Instinctive | 
| INST | 
Instrument | 
| INSTL | 
Installation | 
| INSTLLD | 
Installed | 
| INSTM | 
Instrumentation | 
| INSUL | 
Insulate, Insulation, Insulator | 
| INT | 
Interrupt | 
| INT | 
Intersection | 
| INTCON | 
Interconnection | 
| INTCP | 
Intercept | 
| INTEG | 
Integral | 
| INTEN | 
Intensity | 
| INTERACT | 
[USA] Integrated Research Aircraft Control Technology. | 
| INTERCOM | 
Intercommunication | 
| INTFC | 
Interface | 
| INTG | 
Integral | 
| INTGT | 
Integrate, Integrating | 
| INTL | 
Internal | 
| INTLK | 
Interlock | 
| INTMD | 
Intermediate | 
| INTMT | 
Intermittent | 
| INTPH | 
Interphone | 
| INTR | 
Interior | 
| INTRG | 
Interrogate, Interrogator | 
| INTRPT | 
Interrupt | 
| INU | 
Inertial Navigation Unit | 
| INV | 
Inverter | 
| INWP | 
Intermediate Waypoint | 
| IOC | 
Indirect Operating Cost | 
| IOC | 
Initial, or Interim Operational Capability | 
| Ione | 
[USA] Nom de code du Aichi AI-104. N'a jamais existé. | 
| IOR | 
Immediate Operationnal Requirement | 
| IP | 
Intermediate Pressure | 
| IP | 
Invoice Packing Card | 
| IP | 
Initial Point (pour une attaque) | 
| IP | 
Instructor Pilot | 
| IPC | 
Illustrated Parts Catalog | 
| IPC | 
Intermediate Pressure Bleed Check Valve | 
| IPCT | 
Initial Provisioning Coordination Team | 
| IPD | 
Illustrated Provisioning Document | 
| IPD | 
Initial Provisionning Data | 
| IPL | 
Illustrated Parts List | 
| IPPU | 
Instrumentation POsition Pick-off Unit | 
| IPS | 
Incorrect Phase Sequence | 
| IPT | 
Inadvertent Power Transfer | 
| IPV | 
Indicator Para Visual | 
| IR | 
Inertiel Reference | 
| IR | 
Infra Red | 
| IRADS | 
[USA] Infra-Red Acquisition and Detection System | 
| I-RAMS | 
[USA] Integrated Retractable Aircraft Munition System, du RAH-66 Comanche. | 
| IRAN | 
[USA] Inspect and Repair As Necessary, une procédure de maintenance  | 
| IRBM | 
Intermediate Range Ballistic Missile | 
| IRCCM | 
Infrared Counter-counter Measures | 
| IRCM | 
Infrared Counter Measures | 
| IRD | 
[UK] InfraRed Decoy | 
| Irene | 
[USA] Nom de code du Junkers Ju 87, n'était pas en service au Japon. | 
| IRH | 
Infrared Homing | 
| IRIAF | 
[Iran] Islamic Republic of Iran Air Force - Armée de l'Air de la république islamique iranienne. | 
| IRLS | 
Infra-Red Line Scan | 
| Iron Hand | 
[USA] Premieres missions "Wild Weasel" sur le Vietnam, en 1965. | 
| Iron Lung | 
[USA] Boeing KC-135R et RC-135M, avions ELINT | 
| IRQ | 
Interrupt Request | 
| IRS | 
Inertial Reference System | 
| IRST | 
Infrared Search and Track | 
| IRSTS | 
Infrared Search and Track Sensor | 
| IRU | 
Inertial Reference Unit | 
| Irving | 
[USA] Nom de code du Nakajima J1N Gekko | 
| IRWR | 
Infra-Red Warning Receiver | 
| ISA | 
Inertial Sensor Assembly | 
| ISA | 
International Standard Atmosphere | 
| ISADS | 
[USA] Innovative Strategic Aircraft Design Study. | 
| ISAR | 
[USA] Inverted Synthetic Aperture Radar. | 
| ISB | 
Inter-System Bus | 
| ISD | 
In Service Date | 
| ISDU | 
Inertial Sensor Display Unit (IRS) | 
| ISG | 
Instrument Symbol Generator Unit | 
| ISO | 
International Standardization Organisation | 
| ISOL | 
Isolation | 
| ISS | 
Inertial Sensor System | 
| ISU | 
Inertial Sensor Unit | 
| ISWL | 
Isolated Single Wheel Load | 
| IT | 
Interruption | 
| ITP | 
[USSR] Istrebitel'tyazhely Pushechny - Chasseur lourd, avec canon. | 
| ITP | 
Intent to Purchase | 
| ITP | 
Instruction to Proceed | 
| ITT | 
Invitation To Tender | 
| IUKADGE | 
[UK] Improved United Kingdom Air Defence Ground Environment | 
| IV | 
Isolation Valve | 
| IVS | 
Inertial Vertical Speed | 
| IVS | 
Interactive Voice System | 
| I/WAC | 
[USA] Interface/ Weapon Aiming Computer, installé sur les AV-8A Harriers de l'USMC à la place du système de navigation britannique FE541, plus compliqué.  | 
| IWS | 
Integrated Weapon System | 
| IX | 
[USA] USN:  Unclassified Auxiliary. | 
| IXSS | 
[USA] USN:  Unclassified Auxiliary Submarine |