MSA可能指：
組織或企業
编辑- 馬來西亞-新加坡航空：新加坡航空及馬來西亞航空的前身。
- 交通運輸部海事局（China Maritime Safety Administration）
- 海上保安廳（舊稱Maritime Safety Agency，今稱Japan Coast Guard）
- Maritime Security Agency, aka the Pakistan Coast Guard
- Masonic Service Association, a Freemasonry publishing resource
- Microscopy Society of America, a society for the promotion of microscopy
- Mine Safety Appliances, a manufacturer of industrial safety clothing and equipment
- Mineralogical Society of America, an organization for the advancement of mineralogy
- Motion Sensing Alliance, an alliance for the development of motion sensing technology
- Motor Sports Association, the governing body for motorsport in the United Kingdom
- Mutual Security Agency, established by the US Mutual Security Act (1951), and distributed aid to Europe after the Marshall Plan
- Mycological Society of America, a society promoting the study of fungi
教育
编辑學位
编辑- Master of Accountancy, an accounting degree
- Master of Science in Administration, a degree providing preparation for administrative positions
學校
编辑- Mackintosh School of Architecture, an architecture school in Glasgow, Scotland
- Manchester School of Architecture, an architecture school in Manchester, England
- Maryland School of the Arts, a fictional dance school in the film Step Up
- Middle States Association of Colleges and Schools, an evaluation and accreditation association
- Minnesota Math and Science Academy, a school in Minnesota
- Mississippi School of the Arts, a high school in Brookhaven, Mississippi
- Missouri Scholars Academy, a summer program at the University of Missouri
- MSA Mutfak Sanatlari Akademisi, a culinary arts institute in Istanbul, Turkey
- Modern Sciences and Arts University, a university in October City, Egypt
- Monash Student Association, the student government association of Monash University, Melbourne, Australia
- Muslim Students' Association, a group dedicated to Islamic societies on college campuses in Canada and the United States
科學及醫學
编辑- 5-甲氧基水杨酸（5-Methoxysalicylic acid）：一种化合物，在MALDI质谱中用作基质。
- 甘露醇鹽瓊脂（Mannitol salt agar）：一種微生物培養基。
- Measurement systems analysis, the analysis of the process of obtaining measurements
- 甲基磺酸（Methanesulfonic acid）
- Middle Stone Age, a period of African prehistory
- 多重序列比對（Multiple sequence alignment）是對三個以上的生物學序列，如蛋白質序列、DNA序列或RNA序列所作的序列比對。
- Multiple system atrophy, a degenerative neurological disorder
- Multiscale approximation 或多解析度分析（multiresolution analysis）
- Morphosyntactic alignment (linguistics)
- Measure of sampling adequacy, a quality criterion for a correlation matrix as prequisition for factor analysis (statistics)
科技
编辑- Hewlett Packard Modular Smart Array, the primary storage device for some data centres
- Mail submission agent, a computer program used when sending email
- Master service agreements, a master agreement defining services to be delivered
- Microsoft Access：一種資料庫管理系統
- Mobile Service Architecture, a combination of Java ME extensions
- MSA，MIPS SIMD 架构
- Multi-source agreement, an agreement between multiple manufacturers to make products which are compatible across vendors
運輸
编辑- MSA Garratt, a steam engine class of the Western Australian Government Railways
- 公路服務區（Motorway service area）
- Muskrat Dam Airport, an airport at Muskrat Dam, Ontario, Canada (IATA code)
其他
编辑- 馬來語（Malay language）
- Mapping Services Agreement, a licensing contract between local authorities in the United Kingdom and suppliers of geographic data
- Matthew Shepard Act, 2009 United States federal hate-crime legislation
- Market Square Arena, an indoor arena in Indianapolis, Indiana demolished in 2001
- Medical savings account, a tax-deferred deposit account for medical expenses
- 都会统计区, a geographical area associated with an urban area of 50,000 people or more, as defined by the United States Office of Management and Budget
- United States Micropolitan Statistical Area, a geographical area associated with an urban area of 10,000 to 49,999 people, as defined by the United States Office of Management and Budget
- Minimum safe altitude, used for safely navigating aircraft over terrain or large structures
- 現代標準阿拉伯語（Modern Standard Arabic）
- Tobacco Master Settlement Agreement, an agreement reached between U.S. States and major tobacco companies
- MSA Kyotei, a Japanese abbreviation in reference to U.S. and Japan Mutual Defense Assistance Agreement.
- Minesweeper Auxiliary
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