English abbreviations from mars to mash
- MARS (Military Amateur Radio Station)
- MARSA (Military Assumes Responsibility For Separation of Aircraft)
- MARSEC (Maritime Security)
- MARSOC (Marine Corps Special Operations Command)
- MARSOF (Marine Corps Special Operations Forces)
- MART (Mid- Atlantic Rail Trail)
- Mart., M., MM. (Martyr, Martyres ("Martyr", "Martyrs" Breviary))
- MARTA (Multiple Access RouTing Authority)
- MARV (Mini Autonomous Robot Vehicle)
- MARVEL ((project) Multi-object Apache Point Observatory Radial Velocity Exoplanet Large-area Survey, a NASA-funded project to search for exoplanets)
- MAS (NATO Military Agency for Standardization)
- MASAS (Monte Agliale Supernovae and Asteroid Survey)
- MASC (Massachusetts Association of Student Councils)
- MASCAL (Mass Casualty)
- MASCIP (Multidisciplinary Association for Spinal Cord Injury Professionals)
- Maser (Microwave Amplification by Stimulated Emission of Radiation)
- MASF (Mobile Aero-medical Staging Facility)
- MASH (Mobile army surgical hospital (US))