RRTA
| Acronym | Definition |
|---|---|
| RRTA | Railroad Retirement Tax Act (IRS; similar to Social Security) |
| RRTA | Red Rose Transit Authority |
| RRTA | Reversed Ray Tracing Algorithm |
| RRTA | Rapid Response for Technical Assistance (US DHHS) |
| RRTA | Rolling River Teachers' Association (Manitoba, Canada) |