| Acronym | Definition |
|---|
| TRTA➣Trade-Related Technical Assistance (UN World Trade Organization) |
| TRTA➣Tahoe Rim Trail Association |
| TRTA➣Texas Retired Teachers Association |
| TRTA➣Teito Rapid Transit Authority (Japan) |
| TRTA➣Tennessee Recreation Therapy Association |
| TRTA➣Teddy Roosevelt Terrier Association |
| TRTA➣Technical Road Transport Association (Netherlands) |
| TRTA➣Tinnitus Retraining Therapy Association (Portland, OR) |
| TRTA➣Thai - Russian Trade Association |
| TRTA➣Tennessee Retired Teachers Association |
| TRTA➣Tokyo Rapid Transit Authority |
| TRTA➣Tri-River Transit Authority |
| TRTA➣Texas Rail Tourism Alliance |
| TRTA➣Three Rivers Trail Association (Canada) |
| TRTA➣Traumatic Rupture of Thoracic Aorta |
| TRTA➣Texas Rail Trail Alliance |
| TRTA➣Toms River Transportation Association |
| TRTA➣Tuscarawas Regional Technology Accelerator (Ohio) |
| TRTA➣Tumbler Ridge Teachers Association (British Columbia, Canada) |
| TRTA➣Tennant Research Technology Applications |
| TRTA➣Tennessee River Trail Association |
| TRTA➣Two Rivers Tennis Association (Virginia) |