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