MSA

MSA may refer to: Organisations and businesses:the Manchester School of Architecture, An architecture school in Greater Manchester, EnglandMalaysia-Singapore Airlines, now Singapore Airlines and Malaysia Airlines separatelyMasonic Services Association, a Freemason resource that offers publications on a variety of Masonic topicsMath and Science Academy, a school in MinnesotaMedical Supplies Agency - part of the United Kingdom's Amred Forces procurement systemMiddle States Association of Colleges and Schools, a non-profit association dedicated to educational excellence and improvement through peer evaluation and accreditation.Mine Safety Appliances, a manufacturer of industrial safety clothing and equipmentMineralogical Society of America, a scientific organization founded for the advancement of mineralogyThe Missouri Scholars Academy, a summer program for gifted students entering their Junior year of High School in the State of Missouri hosted at the University of Missouri-ColumbiaMissouri Students Association, the student government association of the University of Missouri-ColumbiaMonash Student Association, the student government association of the Monash University, Melbourne, AustraliaMotorcycle sport South AfricaMotor Sports Association, the governing body for motorsport in the United KingdomMuslim Students' Association, a group dedicated to Islamic societies on college campuses in Canada and the United StatesMycological Society of America, a scientific society promoting the study of fungi  [1]
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A Medicare health plan option made up of two parts. One part is a Medicare MSA Health Insurance Policy with a high deductible. The other part is a special savings account where Medicare deposits money to help you pay your medical bills.

(See also Central City, Standard Metropolitan Statistical Area) Areas defined by the U.S. Office of Management and Budget. A Metropolitan Statistical Area (MSA) is 1) A county or a group of contiguous counties that contain at least one city of 50,000 inhabitants or more, or 2) An urbanized area of at least 50,000 inhabitants and a total MSA population of at least 100,000 (75,000 in New England). The contiguous counties are included in an MSA if, according to certain criteria, they are essentially metropolitan in character and are socially and economically integrated with the central city. In New England, MSAs consist of towns and cities rather than counties. (DOE4) (DOE5) (FHWA3)

1) The minimum altitude specified in Federal Aviation Regulation (FAR) Part 91 for various aircraft operations; 2) Altitudes depicted on approach charts which provide at least 1,000 feet of obstacle clearance for emergency use within a specified distance from the navigation facility upon which a procedure is predicated. These altitudes will be identified as Minimum Sector Altitudes or Emergency Safe Altitudes and are established as follows: a) Minimum Sector Altitudes. Altitudes depicted on approach charts which provide at least 1,000 feet of obstacle clearance within a 25-mile radius of the navigation facility upon which the procedure is predicated. Sectors depicted on approach charts must be at least 90 degrees in scope. These altitudes are for emergency use only and do not necessarily assure acceptable navigational signal coverage; b) Emergency Safe Altitudes. Altitudes depicted on approach charts which provide at least 1,000 feet of obstacle clearance in nonmountainous areas and 2,000 feet of obstacle clearance in designated mountainous areas within a 100-mile radius of the navigation facility upon which the procedure is predicated and normally used only in military procedures. These altitudes are identified on published procedures as "Emergency Safe Altitudes." (FAA4)

Makeshift Apathy 
Master of Science In Administration 
Medical Savings Account (from IRS Form 5329) 
Metropolitan Statistical Area  For more possible definitions for MSA, click here
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Minimum Safe Altitude