| Acronym | Definition |
|---|
| HRT | Hormone Replacement Therapy |
| HRT | Holden Racing Team (formed in 1990) |
| HRT | Hampton Roads Transit (public transportation system, Hampton Roads, VA, USA) |
| HRT | Hrvatska radiotelevizija (Croatian radio and television) |
| HRT | Heart Rate Training (exercise) |
| HRT | Hostage Rescue Team |
| HRT | Hydraulic Retention Time |
| HRT | Hotel, Restaurant and Tourism (various organizations) |
| HRT | Honda Racing Team |
| HRT | High Resolution Technology |
| HRT | Habit Reversal Training (psychotherapy) |
| HRT | Heidelberg Retina Tomograph (glaucoma detection test) |
| HRT | Holden Racing Team |
| HRT | Health Risk Assessment |
| HRT | Hard Real-Time |
| HRT | Hotel Room Tax (BC, Canada) |
| HRT | High Rising Terminal (speech) |
| HRT | Heart Rate Turbulence |
| HRT | Harm Reduction Therapy (healthcare) |
| HRT | Hydraulic Rescue Tool |
| HRT | Hotel Royal Taipei (Taipei, Taiwan) |
| HRT | Horizontal Return Tubular |
| HRT | Host Routing Table |
| HRT | High-Resolution Tracker |
| HRT | Health Records Technician |
| HRT | Habitat Restoration Team |
| HRT | High Risk Target (US Army) |
| HRT | High-Resolution Telemetry |
| HRT | Higher Rate of Tax (UK) |
| HRT | Hartwell Railway Company |
| HRT | Hybrid Railway Tie |
| HRT | Human Rights Trust |
| HRT | Heart Related Trouble |
| HRT | Hydraulic Reservoir Temperature |
| HRT | Health-Related Tasks (curriculum) |
| HRT | Highway Regulating Team |