| Abbreviation | Definition |
|---|---|
| AIT | Advanced Infantry Training |
| AIT | Aeromedical Isolation Team |
| AIT | Aryan Invasion Theory |
| AIT | Atmospheric Interceptor Technology |
| AIT | Automatic Identification Technology |
| AITC | Army Interoperability Test Center |
| AITF | Ammunition Initiatives Task Force |
| AIT-III | Automatic Identification Technology contract number Three |
| AITN | Army Interoperability Test Network |
| AITP | Audit Information Transfer Protocol |
| AITR | Aided Target Recognition |
| AITR | Army Information Technology Registry |
| AITR | Automated Information Technology Register |
| AITST | Armor Interrated Termal Signature Targets |
| AIU | ADN (Automatic Digital Network) Interface Unit |
| AIU | Advanced Interface Unit |
| AIWB | Appendix Inside the Waist Band |
| AIWS | Advanced Individual Weapon System |
| AIWS | Advanced Interdiction Weapon System |
| AJ | Anti Jam |