| Acronym | Definition |
|---|
| RTAC | Regional Targets Advisory Committee (California) |
| RTAC | Reproductive Technology Accreditation Committee (Fertility Society of Australia) |
| RTAC | Regional Technical Assistance Center |
| RTAC | Regional Transportation Advisory Committee (various locations) |
| RTAC | Research and Technology Advisory Committee (US NASA) |
| RTAC | Regional Trauma Advisory Council (Wisconsin) |
| RTAC | Rotational Translational Actuator |
| RTAC | Rural Transit Assistance Center (Macomb, IL) |
| RTAC | Real-Time Automation Controller |
| RTAC | Réflexe Tonique Asymétrique du Cou (French: Asymmetric Tonic Neck Reflex) |