| Abbreviation | Definition |
|---|---|
| HRAI | Heating, Refrigeration and Air Conditioning Institute of Canada |
| HRAS | Hudson River Audubon Society |
| HRFS | Human Rights First Society |
| HRIMS | Hotel Restaurant Institution Management Society |
| HRPS | Historic Reno Preservation Society |
| HRS | Heart Rhythm Society |
| HRS | House Rabbit Society |
| HRSS | House Rabbit Society of Singapore |
| HS | High Society |
| HS | Hip Society |
| HS | Histochemical Society |
| HS | Hume Society |
| HS | Hydrogen Society |
| HS | Hydrographic Society |
| HSA | Hegel Society of America |
| HSAC | Humane Society of Alamance County |
| HSAC | Humane Society of Atlantic County |
| HSANZ | Haematology Society of Australia and New Zealand |
| HSBH | Humane Society of the Black Hills |
| HSBR | Humane Society of Blue Ridge |