| Acronym | Definition |
|---|
| MHRN➣Mental Health Research Network (UK) |
| MHRN➣Montana Human Rights Network (Helena, MT) |
| MHRN➣Manitoba Harm Reduction Network (Manitoba, Canada) |
| MHRN➣Mental Health Registered Nurse |
| MHRN➣Maryland Homeschool Resource Network (website) |
| MHRN➣Medically High Risk Newborn |
| MHRN➣Mackenzie Highway Repeater Network (radio club; Canada) |