| MRN | Machine Readable News 
| Others |
| MRN | Macquarie Radio Network
| Others |
| MRN | Magazine Road North
| Others |
| MRN | Magnetic Resonance Neurogram
| Others |
| MRN | Magnetic Resonance Neurography
| Others |
| MRN | Major Races Number
| Others |
| MRN | Management Research Network
| Others |
| MRN | Manufacturing Referral Network
| Others |
| MRN | Marion Radio News
| Others |
| MRN | Martin Ramon Nievera
| Others |
| MRN | Maryland Recycling Network
| Others |
| MRN | Material React Native
| Others |
| MRN | Material Reference Number
| Others |
| MRN | Material Return Note
| Others |
| MRN | Material Return Notes
| Others |
| MRN | Material Return Notice
| Others |
| MRN | Mathis Rumpl and Nordsieck
| Others |
| MRN | Median Raphe Nucleus
| Others |
| MRN | Medical Record Number
| Others |
| MRN | Medical Records Number
| Others |
| MRN | Medical Research Network
| Others |
| MRN | Medical Review Nurse
| Others |
| MRN | Medicare Redetermination Notice
| Others |
| MRN | Medicare Remittance Notice
| Others |
| MRN | Merchant Rewards Network
| Others |
| MRN | Message Reference Number
| Others |
| MRN | Meteorological Rocket Network
| Others |
| MRN | Metropolitan Resilience Network
| Others |
| MRN | Miger Rogers Neighborhood
| Others |
| MRN | Mind Research Network
| Others |
| MRN | Mine Right Now
| Others |
| MRN | Mission Resource Network
| Others |
| MRN | Missionary Resources Network
| Others |
| MRN | Missions Resource Network
| Others |
| MRN | Missouri Recovery Network
| Others |
| MRN | Money Recovery Nationwide
| Others |
| MRN | Morganton, North Carolina USA
| Others |
| MRN | Morris Register Nederland
| Others |
| MRN | Motor Racing Network
| Others |
| MRN | Movement Reference Number
| Others |
| MRN | MRE11 RAD50 NBS1
| Others |
| MRN | Multi Region Network
| Others |
| MRN | Multi Regional National
| Others |
| MRN | Multimodal Residual Networks
| Others |
| MRN | My Real Name
| Others |