| MAS | Magic-Angle Spinning | 魔角自旋 |
| MAS | Medical advisory service | 医疗咨询服务 |
| MAS | Malaysia | 马来西亚 |
| MAS | Military Agency for Standardization | 军事防护勤务 |
| MAS | Malaysian Airline System | 马来西亚航空公司系统 |
| MAS | Metal-Alumina-Semiconductor | 金属-氧化铝半导体 |
| MAS | Multiple Sequence Alignment | 多序列联配 |
| MAS | Malaysian Airlines System (ICAO code) | 马来西亚航空系统（ICAO代码） |
| MAS | Montana Archaeological Society | 蒙大拿州考古协会 |
| MAS | Malta Aviation Society | 马耳他航空协会 |
| MAS | Massachusetts Audubon Society | 马萨诸塞州奥杜邦协会 |
| MAS | Chennai, India (Nugumbakkam Airport Code) | 印度钦奈（Nugumbakkam机场代码） |
| MAS | Muslim American Society | 美国穆斯林协会 |
| MAS | Mecklenburg Audubon Society (North Carolina) | 梅克伦堡-奥杜邦协会（北卡罗来纳州） |
| MAS | Museum Association of Saskatchewan (Regina, SK, Canada) | 萨斯喀彻温省博物馆协会（Regina，SK，加拿大） |
| MAS | Market Analysis Service | 市场分析服务 |
| MAS | Manufacturing Advisory Service | 制造咨询服务 |
| MAS | Master of Aeronautical Science (degree) | 航空科学硕士（学位） |
| MAS | Military Aftermarket Services | 军事售后服务 |
| MAS | Maritime Assistance Service (International Maritime Organization) | 海事援助处（国际海事组织） |
| MAS | Milwaukee Astronomical Society | 密尔沃基天文学会 |
| MAS | Mongolian Academy of Sciences | 蒙古科学院 |
| MAS | Mission d'Amenagement du Delta du Fleuve Senegal | 杜拉杜伊洛瓦底三角洲'Amenagement使命d污水大为减少 |
| MAS | Metropolitan Ambulance Service (Melbourne, Australia) | 大都会救护车服务（澳大利亚墨尔本） |
| MAS | Minimum Acceptable Strength | 最小可接受强度 |
| MAS | Missouri Academy of Science | 密苏里科学院 |
| MAS | Multi Agent System | 多Agent系统 |
| MAS | Marker Assisted Selection | 标记辅助选择 |
| MAS | Maneuver Ammunition Systems (DoD) | 机动弹药系统（DoD） |
| MAS | Memorial Affairs Squadron | 纪念事务中队 |
| MAS | Mass Announcement System | 大规模公告系统 |
| MAS | Maintenance Action Sheet | 维护行动表 |
| MAS | Map Accuracy Standard | 地图精度标准 |
| MAS | Marketing Analysis System | 营销分析系统 |
| MAS | Make A Star (gaming, Katamari Damacy) | Make A Star（游戏，Katamari Damacy） |
| MAS | Make A Star (website) | Make A Star（网站） |
| MAS | Mission Aircrew School | 飞行任务机组人员学校 |
| MAS | Matrix Algebraic Separation (algorithm) | 矩阵代数分离（算法） |
| MAS | Mainland Air Services (New Zealand) | 内地航空服务（新西兰） |
| MAS | Military Assistance Sales | 军事援助销售品 |
| MAS | Mission Area Summary | 任务区摘要 |
| MAS | Military Airlift Squadron | 军事空运中队 |
| MAS | Make-A-Store, Inc. | Make-A-Store公司。 |
| MAS | Maximum Amount Subject (insurance/underwriting) | 最高金额(保险/承销) |
| MAS | Maneuver Air Support | 机动空中支援 |
| MAS | Milliampere Second (quantifies an X-ray beam) | 毫安秒（量化X射线束） |
| MAS | Motoscafo Anti Sommergibile (Italian navy WWI and WWII) | Motoscafo Anti-Somergibile（第一次世界大战和第二次世界大战意大利海军） |
| MAS | Mexican American Studies | 墨西哥裔美国人研究 |
| MAS | Management Analysis Summary | 管理分析总结 |
| MAS | Modular Alarm System | 模块化报警系统 |
| MAS | Multi-Access Spool (IBM Mainframe) | Multi-Access Spool（IBM大型机） |
| MAS | Marianas Audubon Society | 马里亚纳奥杜邦学会 |
| MAS | Military Application Seminar | 军事应用研讨会 |
| MAS | Memento Audere Semper (Latin: remember to dare always) | Memoento Audere Semper（拉丁语：永远记得勇敢） |
| MAS | Maximum Assignable Slots | 最大可分配插槽 |
| MAS | Master of Architectural Studies | 建筑研究硕士 |
| MAS | Multiple-Award Schedule (contract) | 多项奖励计划（合同） |
| MAS | Modern Art Studio (band) | 现代艺术工作室（乐队） |
| MAS | Mandolin Acquisition Syndrome | 下颌骨获得综合征 |
| MAS | Michigan Archaeological Society | 密歇根考古学会 |
| MAS | Multiple Address Spectrum (FCC) | 多址频谱（FCC） |
| MAS | Movimiento de AcciÓn Solidaria (Guatema) | Movimiento de AcciÓn Solidaria (Guatema) |
| MAS | Mozilla Application Suite | Mozilla应用程序套件 |
| MAS | Mandibular Advancement Splint | 下颌前移夹板 |
| MAS | Master of Advanced Studies | 高级研究硕士 |
| MAS | Meconium Aspiration Syndrome | 胎粪吸入综合征 |
| MAS | Management Advisory Service | 管理咨询服务 |
| MAS | Mass Attenuation Coefficient | 质量衰减系数 |
| MAS | Mutual Admiration Society | 互相标榜学会 |
| MAS | McCune-Albright Syndrome | McCune Albright综合征 |
| MAS | MODIS Airborne Simulator | MODIS机载模拟器 |
| MAS | Multiagent System | 多代理系统 |
| MAS | Mobile Atmospheric Spectrometer | 移动式大气光谱仪 |
| MAS | Memory Administration System | 内存管理系统 |
| MAS | masculine | 男子汉的 |
| MAS | Monetary Authority of Singapore | 新加坡金融管理局 |
| MAS | Motivational Assessment Scale | 动机评估量表 |
| MAS | Method of Auxiliary Sources | 辅助电源方法 |
| MAS | Muerte A Secuestradores (paramilitary death squad) | Muerte A Securestradores（准军事敢死队） |
| MAS | Microsoft Activesync | Microsoft Activesync |
| MAS | Movimiento al Socialismo (Movement to Socialism; Argentina, Bolivia, Venezuela) | 社会主义运动；阿根廷、玻利维亚、委内瑞拉 |
| MAS | Modified Alsever Solution | 改良Alsever溶液 |
| MAS | Millimeter-wave Atmospheric Sounder | 毫米波大气探测器 |
| MAS | Masco Corporation (stock symbol) | Masco公司（股票符号） |
| MAS | Multi-Service Access System | 多业务接入系统 |
| MAS | Master Advertising Specialist | 高级广告专家 |
| MAS | Maximal Allowed Shareability | 最大允许可分享性 |
| MAS | Menu Activated Switch | 菜单激活开关 |
| MAS | Mass Air Sensor (automotive) | 空气质量传感器（汽车） |
| MAS | Management Assistance Service | 管理协助服务 |
| MAS | Mutant Analysis Service | 突变分析服务 |
| MAS | Man-Day Accounting System | 人工日会计制度 |
| MAS | Marine Assistance Service | 海上救援服务 |
| MAS | Marine Advisory Service (Sea Grant Program) | 海洋咨询服务（海洋赠款计划） |
| MAS | Multiple Absorbing Surfaces | 多个吸收表面 |
| MAS | Master Assembly Schedule | 总装配计划 |
| MAS | Myanmar Agricultural Service | 缅甸农业服务 |
| MAS | Mechanical Actuation System | 机械驱动系统 |
| MAS | Maritime Air Superiority | 海上空中优势 |