| Acronym | Definition |
|---|
| MAS | Multi Agent System |
| MAS | Monetary Authority of Singapore |
| MAS | Muslim American Society |
| MAS | Manufacturing Advisory Service |
| MAS | Master of Advanced Studies |
| MAS | Multiple-Award Schedule (contract) |
| MAS | Magic-Angle Spinning |
| MAS | Movimiento al Socialismo (Movement to Socialism; Argentina, Bolivia, Venezuela) |
| MAS | Marker Assisted Selection |
| MAS | Masco Corporation (stock symbol) |
| MAS | Chennai, India (Nugumbakkam Airport Code) |
| MAS | Master Airscrew (model aircraft propeller) |
| MAS | Microsoft Activesync |
| MAS | Multiagent System |
| MAS | MODIS Airborne Simulator |
| MAS | Meconium Aspiration Syndrome |
| MAS | Malaysian Airlines System (ICAO code) |
| MAS | Mexican American Studies |
| MAS | McCune-Albright Syndrome |
| MAS | Mass Air Sensor (automotive) |
| MAS | Media Arts and Sciences (Massachusetts Institute of Technology) |
| MAS | Motor Assessment Scale (clinical evaluation method) |
| MAS | Mutual Admiration Society |
| MAS | Media Asset Management |
| MAS | Muerte A Secuestradores (paramilitary death squad) |
| MAS | Metropolitan Ambulance Service (Melbourne, Australia) |
| MAS | Massachusetts Audubon Society |
| MAS | Management Advisory Service |
| MAS | Mandibular Advancement Splint |
| MAS | Mongolian Academy of Sciences |
| MAS | Master Advertising Specialist |
| MAS | Military Airlift Squadron |
| MaS | Make A Star (gaming, Katamari Damacy) |
| MaS | Make A Star (website) |
| MAS | Mozilla Application Suite |
| MAS | Millimeter-wave Atmospheric Sounder |
| MAS | Make-A-Store, Inc. |
| MAS | Milliampere Second (quantifies an X-ray beam) |
| MAS | Memento Audere Semper (Latin: remember to dare always) |
| MAS | Military Agency for Standardization |
| MAS | Microarray Analysis Suite (bioinformatics software) |
| MAS | Mass Attenuation Coefficient |
| MAS | Master of Aeronautical Science (degree) |
| MAS | Marine Advisory Service (Sea Grant Program) |
| MAS | Maneuver Ammunition Systems (DoD) |
| MAS | Method of Auxiliary Sources |
| MAS | Missouri Academy of Science |
| MAS | Movimiento de Acción Solidaria (Guatema) |
| MAS | Maritime Assistance Service (International Maritime Organization) |
| MAS | Milwaukee Astronomical Society |
| MAS | Motoscafo Anti Sommergibile (Italian navy WWI and WWII) |
| MAS | Musée Automobile de la Sarthe (French: Automobile Museum of Sarthe; Sarthe, France) |
| MAS | Message Application Server (Avaya) |
| MAS | Motivational Assessment Scale |
| MAS | Multi-Access Spool (IBM Mainframe) |
| MAS | Michigan Archaeological Society |
| MAS | Military Aftermarket Services |
| MAS | Ministry of Altar Servers (Catholicism) |
| MAS | Memory Administration System |
| MAS | Mandolin Acquisition Syndrome |
| MAS | Memorial Affairs Squadron |
| MAS | Map Accuracy Standard |
| MAS | Mission Aircrew School |
| MAS | Minimum Acceptable Strength |
| MAS | Mass Announcement System |
| MAS | Maritime Air Superiority |
| MAS | Mecklenburg Audubon Society (North Carolina) |
| MAS | Military Assistance Sales |
| MAS | Modern Art Studio (band) |
| MAS | Market Analysis Service |
| MAS | Myanmar Agricultural Service |
| MAS | Maneuver Air Support |
| MAS | Montana Archaeological Society |
| MAS | Motivated Abilities and Skills (UK) |
| MAS | Multifaith Action Society (Vancouver, British Columbia, Canada) |
| MAS | Malta Aviation Society |
| MAS | Marketing Analysis System |
| MAS | Modular Alarm System |
| MAS | Mutuelle d'Action Sociale (French: Mutual Social Action; Morocco) |
| MAS | Marine Assistance Service |
| MAS | Master of Architectural Studies |
| MAS | Museum Association of Saskatchewan (Regina, SK, Canada) |
| MAS | Multi-Service Access System |
| MAS | Management Assistance Service |
| MAS | Matrix Algebraic Separation (algorithm) |
| MAS | Modified Alsever Solution |
| MAS | Mission d'Amenagement du Delta du Fleuve Senegal |
| MAS | Master Assembly Schedule |
| MAS | Man-Day Accounting System |
| MAS | Menu Activated Switch |
| MAS | Mobile Atmospheric Spectrometer |
| MAS | Multiple Address Spectrum (FCC) |
| MAS | Maintenance Action Sheet |
| MAS | Mutant Analysis Service |
| MAS | Maximum Assignable Slots |
| MAS | Mechanical Actuation System |
| MAS | Mainland Air Services (New Zealand) |
| MAS | Mission Area Summary |
| MAS | Manitoba Affidavit of Support (Canada) |
| MAS | Maximum Amount Subject (insurance/underwriting) |
| MAS | Ma’lomat wa Abhath Seyahiyah (Arabic: National Centre for Tourism Information and Research; Saudi Arabia) |
| MAS | Module Attach System |
| MAS | Military Application Seminar |
| MAS | Marianas Audubon Society |
| MAS | Maximal Allowed Shareability |
| MAS | Multiple Absorbing Surfaces |
| MAS | Management Analysis Summary |
| MAS | Mildly Amused Smirk |
| MAS | Military Air System (Eastern Air Defense Sector) |
| MAS | Modern Apprenticeship Scheme |
| MAS | Massachusetts Academy of Science |
| MAS | Medical Aid Scheme (various locations) |
| MAS | Miniature Australian Shepherd (dog) |
| MAS | Mathematics and Statistics (Masters in Actural Sciences) |
| MAS | Management Accounting Software (various organizations) |
| MAS | Miami Ad School (various locations) |
| MAS | Military Air Solutions (now Military Air & Information; UK) |
| MAS | Martial Arts School (various locations) |