| Acronym | Definition |
|---|
| HAR | Highway Advisory Radio |
| HAR | Houston Association of Realtors |
| HAR | Harrisburg (Amtrak station code; Harrisburg, PA) |
| HAR | Humanitarian Action Report (UNICEF) |
| HAR | Haryana (India) |
| HAR | Hawaii Administrative Rules |
| HAR | Hit and Run |
| HAR | Hyperacute Rejection (gastroenterology) |
| HAR | Hadoop Archives |
| HAR | Harmonization (certification mark for low voltage energy cables) |
| HAR | Highway Accident Report (various locations) |
| HAR | High Aspect Ratio |
| HAR | Hospital Account Record (various locations) |
| HAR | Human Accelerated Region (gene) |
| HAR | Hope After Rape |
| HAR | High Altitude Redesign (FAA) |
| HAR | Hazard Analysis Report |
| HAR | Helicopter Aerial Refueling |
| HAR | Height Above Runway |
| HAR | HST Anomaly Report |
| HAR | Horse of the Americas Registry |
| HAR | Help Age/Rwanda |
| HAR | Herpetological Association of Rhodesia |
| HAR | Helicopter Assault Regiment |
| HAR | Hotel Attachment Rate |
| HAR | Hydrologic Assessment Report |