| Acronym | Definition |
|---|
| ATSA➣Association for the Treatment of Sexual Abusers |
| ATSA➣Aviation and Transportation Security Act of 2001 (USA) |
| ATSA➣American Translation Studies Association (now ATISA) |
| ATSA➣Automated Timber Sale Accounting |
| ATSA➣American Tactical Shooting Association |
| ATSA➣Assembly of Turkish Student Associations |
| ATSA➣Advanced Tactical Support Aircraft |
| ATSA➣Aircraft Technical Support Association |
| ATSA➣Aero Tech Service Associates, Inc. |
| ATSA➣Advanced Tactical SIGINT Architecture |
| ATSA➣Air Traffic System Analysis |
| ATSA➣Access to Space Agents (NASA) |
| ATSA➣Antipodal Tapered-Slot Antenna |