| Acronym | Definition |
|---|
| HRU | High Resolution Unit |
| HRU | How Are You |
| HRU | Heat Recovery Unit |
| HRU | Hydrostatic Release Unit |
| HRU | Ham Radio University |
| HRU | Health Research Unit |
| HRU | Human Rights Unit |
| HRU | Hydrological Response Unit |
| HRU | Human Resources Unlimited |
| HRU | High Risk Unit |
| HRU | Hydrological Research Unit |
| HRU | Heading Reference Unit |
| HRU | Healthcare Resource Utilization |
| HRU | Human Reproduction Update (European Society of Human Reproduction and Embryology) |
| HRU | Hydrogen Recovery Unit |
| HRU | Hose Recovery Unit (firefighting equipment) |
| HRU | Hearings and Release Unit |
| HRU | Hypermedia Research Unit |
| HRU | Hardcopy Reconstruction Unit |
| HRU | Humanities Research Unit (University of Saskatchewan) |
| HRU | Higher Reasoning Unit |
| HRU | Hi-current Relay Unit |
| HRU | HDSL Repeater Unit (telecommunications) |
| HRU | Herington Regional Airport, Herington, Kansas, USA (airport code) |