| Abbreviation | Definition |
|---|---|
| I2R | maging Infrared |
| IA | Imagery Analyst |
| IA | Immediate Agreement |
| IA | Imperial Army |
| IA | Implementing Arrangement |
| IA | Indian Army |
| IA | Individual Augmentee |
| IA | Initial Assessment |
| IA | Inspection Authorization |
| IA | Instant Action |
| IA | Integrated Assault |
| IA | Intelligence Assessment |
| IA | Iraqi Army |
| IA | Issuing Authority |
| IA&T | Integration, Assembly, and Test |
| IAC | Image Analysis Center |
| IAC | Indian Army Cavalry |
| IAC | Interagency Advisory Council |
| IAC | International Assassin Corps |
| IAC | Iraq Action Coalition |