I
- IAF – Indian Air Force
- IAF – Israeli Air Force
- ICBM – Intercontinental Ballistic Missile
- ICE – Individual Carrying Equipment
- ID – IDentification
- IED – Improvised Explosive Device
- IFAK – Individual First Aid Kit
- IFF – Identification Friend or Foe
- IFF – Introduction to Fighter Fundamentals (USAF)
- IG – Inspector General (US Military)
- IFV – Infantry Fighting Vehicle
- INSCOM – United States Army Intelligence and Security Command
- Il – Ilyushin
- Interpol – International Criminal Police Organization
- ISO – Inter School Course
- ISR – Intelligence, Surveillance, and Reconnaissance
- IYAAYAS – If You Aint AMMO, You Ain't Shit
Read more about this topic: List Of U.S. Government And Military Acronyms