| Acronym | Definition |
|---|
| HART | Highway Addressable Remote Transducer (protocol; HART Communication Foundation) |
| HART | Hazardous Area Response Team (ambulance service; UK) |
| HART | Hartford Areas Rally Together (Hartford, CT) |
| HART | Human Assisted Reproductive Technology (New Zealand) |
| HART | Housatonic Area Regional Transit (Connecticut USA) |
| HART | Homeless Animals Rescue Team |
| HART | Hybrid and Real-Time Systems (Conference) |
| HART | Halt All Racist Tours (New Zealand) |
| HART | High Altitude Rescue Team |
| HART | Hopkins Adult Reading Test |
| HART | Huntington Area Rapid Transit (Long Island, NY) |
| HART | Henderson Area Rapid Transit (Kentucky, USA) |
| HART | Honda Australia Roadcraft Training |
| HART | HTS Autotechniek Rally Team |
| HART | Holderness Area Rural Transport (UK) |
| HART | Honda of America Racing Team (Ohio) |
| HART | Hornet Autonomous Real-Time Targeting |
| HART | Hillsborough Area Rapid Transit (Florida) |
| HART | Health Assessment Review Tool |
| HART | High Access Rescue Team |
| HART | Honolulu Area Rapid Transit |
| HART | Healing and Recovery After Trauma |
| HART | Hardened Artillery |
| HART | Human-Animal Relational Therapies |
| HART | High Accuracy Registration Technology |
| HART | Historical and Archeological Resources Training (City of Fort Walton Beach; Florida) |
| HART | Heuristic and Analytical Reporting Tool (data warehouse technology) |
| HART | Hot, Alpha, Rich, Toned |