| MRL | MacDonald Research Laboratories 
| Others |
| MRL | Machine Room Less
| Others |
| MRL | Machineroom Less Elevator
| Others |
| MRL | Madras Refineries Limited
| Others |
| MRL | Magnetic Reference Laboratory
| Others |
| MRL | Mahindra Renault Limited
| Others |
| MRL | Main Ring Length
| Others |
| MRL | Manipulator Retention Latch
| Others |
| MRL | Manipulator Retention Lock
| Others |
| MRL | Manual Retention Latch
| Others |
| MRL | Manuals of Romance Linguistics
| Others |
| MRL | Manufacturing Readiness Level
| Others |
| MRL | Manufacturing Readiness Levels
| Others |
| MRL | Map Reading Lights
| Others |
| MRL | Marine Resources Library
| Others |
| MRL | Mark Rite Lines
| Others |
| MRL | Market Readiness Level
| Others |
| MRL | Marketing Resources Ltd
| Others |
| MRL | Massanutten Regional Library
| Others |
| MRL | Master of Religious Leadership
| Others |
| MRL | Master Requirements List
| Others |
| MRL | Material Requirements List
| Others |
| MRL | Materials Research Laboratory
| Others |
| MRL | Materials Resources LLC
| Others |
| MRL | Materiel Requirements List
| Others |
| MRL | Mathematical Research Letters
| Others |
| MRL | Maximum Residual Limit
| Others |
| MRL | Maximum Residue Level
| Others |
| MRL | Maximum Residue Limit
| Others |
| MRL | Maximum Residue Limits
| Others |
| MRL | Mecanism de Rulare Libera
| Others |
| MRL | Mechatronics Research Laboratory
| Others |
| MRL | Media Research Lab
| Others |
| MRL | Media Resource Library
| Others |
| MRL | Media Resource Locator
| Others |
| MRL | Medical Research Laboratory
| Others |
| MRL | Memory Read Line
| Others |
| MRL | Merchandise Recyclers Lqdtrs
| Others |
| MRL | Merck Research Laboratories
| Others |
| MRL | Method Reporting Limit
| Others |
| MRL | Microprocessor Research Lab
| Others |
| MRL | Microsoft Research Labs
| Others |
| MRL | Middle Ring Little
| Others |
| MRL | Midwest Regional League
| Others |
| MRL | Might Reply Late
| Others |
| MRL | Millennium Research Laboratories
| Others |
| MRL | Milwaukee Road Lives
| Others |
| MRL | Miners Lake, Queensland, Australia
| Others |
| MRL | Minimal Risk Level
| Others |
| MRL | Minimal Risk Levels
| Others |
| MRL | Minimum Reporting Limit
| Others |
| MRL | Minimum Risk Level
| Others |
| MRL | Mixed Reality Laboratory
| Others |
| MRL | Modification And Reuse In Logic
| Others |
| MRL | Modified Reporting Limit
| Others |
| MRL | Montana Rail Link
| Others |
| MRL | Montana RailLink Incorporated
| Others |
| MRL | Morrisson Reeves Library
| Others |
| MRL | Morrisson-Reeves Library
| Others |
| MRL | Motor Racing Legends
| Others |
| MRL | Motor Room Less
| Others |
| MRL | Mounted Rocket Launcher
| Others |
| MRL | Multiple Rocket Laucher
| Others |
| MRL | Multiple Rocket Launcher
| Others |
| MRL | Musculoskeletal Research Laboratories
| Others |
| MRL | My Resource Library
| Others |
| MRL | Mycobacteria Research Laboratories
| Others |
| MRL | Mycology Research Laboratories
| Others |