| MSA | measurement system analysis | 测量系统分析 |
| MSA | Marine Safety Agency | 海运安全管理局 |
| MSA | Mineralogical Society of America | 美国矿物学会 |
| MSA | Mutual Security Agency | 共同安全署 |
| MSA | multiplication-stimulating factor | 刺激细胞增殖因子 |
| MSA | Minimum Safe Altitude | 最低安全高度 |
| MSA | Master of Science in Agriculture | 农业科学硕士 |
| MSA | Multiplex Section Adaptation | 复用段适配 |
| MSA | Minimum Sector Altitude | 最低扇区高度 |
| MSA | Maritime Safety Agency | 海上保安厅 |
| MSA | Malaysian Scientific Association | 马来西亚科学协会 |
| MSA | Minnesota Software Association | 明尼苏达软件协会 |
| MSA | Missouri Students Association | 密苏里州学生协会 |
| MSA | Muslim Students Association | 穆斯林学生协会 |
| MSA | Masonic Service Association | 共济会服务协会 |
| MSA | Muslim Student Association | 穆斯林学生协会 |
| MSA | Midwest Sunbathing Association (AANR region) | 中西部日光浴协会（AANR地区） |
| MSA | Museum Store Association | 博物馆商店协会 |
| MSA | Muslim Scholars Association | 穆斯林学者协会 |
| MSA | Middle States Association | 美国中部协会 |
| MSA | Minnesota Society of Anesthesiologists | 明尼苏达州麻醉医师协会 |
| MSA | Minnesota Stroke Association | 明尼苏达州中风协会 |
| MSA | Michigan Society of Anesthesiologists, Inc. | 密歇根麻醉师协会。 |
| MSA | Municipal Services Association (British Columbia) | 市政协会（不列颠哥伦比亚省） |
| MSA | Mississippi Society of Anesthesiologists | 密西西比麻醉医师协会 |
| MSA | Missouri Society of Anesthesiologists | 密苏里州麻醉医师协会 |
| MSA | Montana Stockgrowers Association | 蒙大拿州畜牧业协会 |
| MSA | Metropolitan Statistical Area | 大都会统计区 |
| MSA | Medical Savings Account (from IRS Form 5329) | 医疗储蓄账户（来自IRS表格5329） |
| MSA | Master of Science In Administration | 行政学硕士 |
| MSA | Master of Science in Accounting (degree) | 会计学理学硕士（学位） |
| MSA | Multiple Scatterer Algorithm | 多重散射算法 |
| MSA | Maryland School Assessment | 马里兰学校评估 |
| MSA | Microscopy Society of America | 美国显微镜学会 |
| MSA | Method of Standard Addition | 标准加入方法 |
| MSA | Methane Sulfonic Acid | 甲烷磺酸 |
| MSA | Metropolitan Service Area | 大都会服务区 |
| MSA | Marital Settlement Agreement | 婚姻和解协议 |
| MSA | Middle Stone Age | 中石器时代 |
| MSA | Methanesulphonate | 甲磺酸酯 |
| MSA | Merchant Shipping Act | 《商船法》 |
| MSA | Makeshift Apathy | Makeshift冷漠 |
| MSA | Manchester School of Architecture | 曼彻斯特建筑学院 |
| MSA | Missouri Scholars Academy | 密苏里学者学院 |
| MSA | Measurement Systems Analysis | 测量系统分析 |
| MSA | Market Square Arena | 市场广场竞技场 |
| MSA | Multivariate Statistical Analysis | 多变量统计分析 |
| MSA | Microstrip Patch Antenna | 微带贴片天线 |
| MSA | Micro-Strip Antenna | 微带天线 |
| MSA | Maintenance Service Agreement | 维护服务协议 |
| MSA | Minimum Standard for Accreditation | 认证最低标准 |
| MSA | Mastery of Scottish Arts (Bellevue, WA) | 苏格兰艺术大师（华盛顿州贝尔维尤） |
| MSA | Medical Services Account | 卫生勤务账目 |
| MSA | Maritime Security Act of 1996 | 1996年《海上安全法》 |
| MSA | Motorway Service Area (UK) | 高速公路服务区（英国） |
| MSA | Missionary Sisters of Ajmeer | 阿杰梅尔修女会 |
| MSA | Microsoft Systems Architecture | Microsoft系统体系结构 |
| MSA | Mark Space Amplitude (electronics) | 标记空间振幅（电子） |
| MSA | Military Satellite Communications Architecture | 军用卫星通信体系结构 |
| MSA | Mission Specific Application | 任务特定应用 |
| MSA | Missile Storage Area | 导弹储存区 |
| MSA | Manpower Standard Application | 人力标准应用 |
| MSA | Multilateral Steel Agreement | 多边钢铁协定 |
| MSA | Maritime Surveillance Aircraft | 海上监视飞机 |
| MSA | Most Seriously Affected | 受影响最严重 |
| MSA | Mission Staff Assistant | 特派团工作人员助理 |
| MSA | Masters of Spatial Analysis | 空间分析硕士 |
| MSA | Maritime Safety Agency (Japan) | 海事安全局（日本） |
| MSA | Molloy Software Associates | Molloy Software Associates公司 |
| MSA | Maryland State Assessment | 马里兰州州评估 |
| MSA | Market Service Area | 市场服务区 |
| MSA | Microsoft Student Ambassador | Microsoft学生大使 |
| MSA | Modern Standard Arabic | 现代标准阿拉伯语 |
| MSA | Multisource Agreement | 多源协议 |
| MSA | Malta Standards Authority | 马耳他标准局 |
| MSA | Master Stock Assortment | 主库存产品组合 |
| MSA | Multi-Service Access | 多服务访问 |
| MSA | Multi-dimensional Systolic Array | 多维收缩阵列 |
| MSA | Maximum Size Aggregate | 最大尺寸骨料 |
| MSA | Microgravity Science and Applications | 微重力科学与应用 |
| MSA | Mine Safety Agency | 矿山安全局 |
| MSA | Munitions Storage Area (US DoD) | 弹药储存区（美国国防部） |
| MSA | Missionaries of the Holy Apostles (religious order) | 圣使徒传教士（宗教秩序） |
| MSA | Materials Support Activity | 材料支持活动 |
| MSA | Molino Santa Ana (Guatemala) | 莫利诺圣安娜（危地马拉） |
| MSA | Management System Audit | 管理体系审核 |
| MSA | Managed Services Architecture | 托管服务体系结构 |
| MSA | Meat Sheep Alliance of Florida (Lake City, Florida) | 佛罗里达肉羊联盟（佛罗里达州湖城） |
| MSA | Multiuse Solar Array | 多用途太阳能阵列 |
| MSA | Million Standard Axles (transportation engineering) | 百万标准轴（运输工程） |
| MSA | Measure of Sampling Accuracy | 采样精度测量 |
| MSA | Major Support Area | 主要支持区域 |
| MSA | Member Services Area | 会员服务区 |
| MSA | Melissa Sue Anderson (actress) | 梅丽莎·苏·安德森（女演员） |
| MSA | Master Sales Agreement | 主销售协议 |
| MSA | Memory Subassembly | 内存子组件 |
| MSA | Management Security Administrator | 管理安全管理员 |
| MSA | Major System(s) Acquisition | 主要系统采办 |