| Abbreviation | Definition |
|---|---|
| IVE | Instant Virtual Extranet |
| IVIS | Integrated Vehicular Information System |
| IVIS | Inter-vehicular Information System |
| IVMF | Imperatorskіj Voenno-Morskoy Flot(Imperial Russian Naval Service) |
| IVMMD | Interim Vehicle Mounted Mine Detector |
| IVR | Initial Voice Report |
| IVRU | Interactive Voice Response Unit |
| IVSN | Initial Voice Switched Network |
| IVT | Acquisition Category IV-T; Test and Evaluation required |
| IVVF | Imperatorskіj Voenno-Vozdushnyj Flot(Imperial Russian Air Service) |
| IW | Information Warfare |
| IW | Irregular Warfare |
| IWARS | Installation Worldwide Ammunition Reporting System |
| IWC | Information Operations Warfare Commander |
| IWC | Integrated Weapon Complex |
| IWC2W | Information Warfare/Command and Control Warfare |
| IWCG | Iraq War Clinician Guide |
| IWCS | Integrated Tactical Communications System |
| IWD | Integrated Weapons Display |
| IW-D | Defensive Information Warfare |