| Acronym | Definition |
|---|
| MRU | Maximum Receive Unit (PPP) |
| MRU | Most Recently Used (opposite of LRU) |
| MRU | Mykolas Romeris University (Lithuania) |
| MRU | Medical Research Unit (various organizations) |
| MRU | Maximum Reception Unit |
| MRU | Most Recently Used |
| MRU | Mount Royal University (Calgary, Alberta, Canada) |
| MRU | Medical Resource Utilization |
| MRU | Migration Research Unit (UK) |
| MRU | Mobile Response Unit |
| MRU | Medical Rehabilitation Unit (various loctions) |
| MRU | Mobile Rescue Unit (obsolete) |
| MRU | Mountain Rescue Unit |
| MRU | Motion Reference Unit |
| MRU | Media Relations Unit (various organizations) |
| MRU | Multi-campus Research Unit |
| MRU | Magnetic Resonance Urography |
| MRU | Mechatronics Research Unit (EU) |
| MRU | Mauritius, Mauritius - Plaisance (Airport Code) |
| MRU | Media Robot Utility (HP OpenVMS) |
| MRU | Military Radar Unit |
| MRU | Mobile Radio Unit |
| MRU | Mercury Removal Unit (equipment used to trap mercury to prevent liquid metal embrittlement) |
| MRU | Machine Records Unit |
| MRU | Much Regret Unable |
| MRU | Macau Rugby Union (Macau, China) |
| MRU | Manu River Union |
| MRU | Manifest Review Unit (customs) |
| MRU | Minimum Revisable Unit |
| MRU | Motivation Reaction Unit (writing structure) |
| MRU | Management Reporting Unit |
| MRU | Mobile Repair Unit |
| MRU | Mechanical Refrigeration Unit (Natural Gas Industry) |
| MRU | Minimum/Maintenance Replacement Unit |
| MRU | Message Received and Understood |
| MRU | MEG (Monoethylene Glycol) Regeneration Unit (gas production) |
| MRU | Maximized Resource Utilization |
| MRU | Mobile Retail Unit |
| MRU | Many Regrets Unable (responding to invitations) |
| MRU | Magnetic Receiver Unit |