| Acronym | Definition |
|---|
| ATAC➣Arimidex, Tamoxifen Alone or in Combination (cancer study) |
| ATAC➣Agenzia del Trasporto Autoferrotranviario del Comune di Roma (Italian: Agency for Rail and Road Transport of the City of Rome; Rome, Italy) |
| ATAC➣Active Thermo Atmosphere Combustion |
| ATAC➣Air Transport Association of Canada |
| ATAC➣Anti-Terrorism Advisory Council |
| ATAC➣Area Tallahassee Aquatic Club (Florida) |
| ATAC➣Advanced Tactical |
| ATAC➣Atrial Tachycardia (medical) |
| ATAC➣Auto Theft Advisory Committee (San Diego, CA) |
| ATAC➣Agenzia Per I Trasporti autoferrotranviari del Comune Di Roma |
| ATAC➣Antiterrorism Alert Center (Navy) (US DoD) |
| ATAC➣American Teens Against Crime (Hardy Boys Undercover Brothers book series) |
| ATAC➣Advanced Traceability And Control |
| ATAC➣Advanced Team Attack Control (Counter-Strike gaming plugin) |
| ATAC➣Agile Tactical Air Component (Killzone) |
| ATAC➣All Terrain All Conditions (boots) |
| ATAC➣Advanced Tactical Air Command |
| ATAC➣Australian Transport Advisory Council |
| ATAC➣Air Transportation Association of Canada |
| ATAC➣Association of Theatrical Artists and Craftspeople (Bloomfield, NJ) |
| ATAC➣Advanced Tactics Airsoft Class (Albany, OR) |
| ATAC➣Antiterrorist Alert Center |
| ATAC➣Automatic Targeting Attack Communicator (from the movie For Your Eyes Only) |
| ATAC➣Anti-Terrorism Advisory Committee |
| ATAC➣Azienda Tramvie e Autobus del Comune Di Roma |
| ATAC➣Asociación Tecnológica Amateur de Comunicaciones |
| ATAC➣Advanced Technology Advisory Committee |
| ATAC➣Art Talks Artists' Collective |
| ATAC➣Artelisys Technical Assistance Center (Ewa Beach, HI) |
| ATAC➣Association Technique pour l'Action Culturelle (French: Technical Association for Cultural Action) |
| ATAC➣Association Terre d'Aragon en Cabardès (French: Land Association of Aragon Cabardès; Aragon, France) |
| ATAC➣Avaya Technology and Consulting |
| ATAC➣Aerospace Technology Advisory Committee |
| ATAC➣Adaptive Transform Acoustic Coding (more commonly seen as ATRAC) |
| ATAC➣Anti Terrorism Alert Center (US) |
| ATAC➣AIDS Treatment Action Coalition |
| ATAC➣Advanced Technology Assessment Center |
| ATAC➣Army Tank-Automotive Center (US Army; predecessor to TACOM) |
| ATAC➣Arizona Transfer Articulation Committee (Phoenix, AZ) |
| ATAC➣Air Transportable Acoustic Communication |
| ATAC➣Air-Transportable Acoustic Communication |
| ATAC➣Acquisition Transformation Action Council |
| ATAC➣Air Tasking Authority Commander |
| ATAC➣Apparel Textile Action Committee (Canada) |
| ATAC➣Advanced Technical Assistance Center |
| ATAC➣Advanced Tactical Assault Command (gaming group) |
| ATAC➣(acrylamidopropyl)trimethylammonium Chloride |
| ATAC➣Advanced Tactics and Countermeasures |
| ATAC➣Asset Tracking and Accountability Control System |
| ATAC➣Airborne Tactical Air Coordinator |
| ATAC➣Aegis Tactical Assessment Capability |
| ATAC➣All Terrain Articulated Crane |