| Abbreviation | Definition |
|---|---|
| ATA | Army Training Agenda |
| ATAADS | Antitank Assault Air Defense System |
| ATAC | Air-To-Air Combat |
| ATAC | All Terrain Armored Combatant |
| ATAC | Anti-Terrorism Alert Center |
| ATACC | Advanced Tactical Air Command Center |
| ATACC | Alternate Tactical Air Control Center |
| ATACMS | Army TACtical Missile System |
| ATACO | Air Tactical Actions Control Officer |
| ATACOMAP | Army TActical Command and Control MAster Plan |
| ATACS | Advanced Target Acquisition Counterfire System |
| ATACS | Army Tactical Area Communications System |
| ATACS | Army Tactical Communications System |
| ATADS | Anti-tank Air Defense System |
| ATAF | Allied Tactical Air Force (NATO) |
| ATAFCS | Airborne Target Acquisition Fire Control System |
| ATAM | Air to Air Missile |
| ATAP | Anti-Terrorist Action Plan |
| ATAR | Air to Air Recognition |
| ATARMS | Advanced Tactical Active Radar Missile System |