MSA (消歧義)

MSA可能指：

**組織或企業**
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**

**學位**
 Master of Accountancy, an accounting degree- Master of Science in Administration, a degree providing preparation for administrative positions

**學校**
 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**
 5-甲氧基水楊酸（5-Methoxysalicylic acid）：一種化合物，在MALDI質譜中用作基質。- 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**
 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 架構 - Multi-source agreement, an agreement between multiple manufacturers to make products which are compatible across vendors

**運輸**
 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**
 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
*都會統計區, 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