SMA may stand for:

Chivalry and Knighthood[link]

• Brotherhood and Knight of the Order of Saint Michael of the Wing (Real Ordem de São Miguel da Ala)

Education[link]

• Saint Mary's Academy, Dominica, a private high school in the island of Dominica, in the Caribbean
• San Marcos Baptist Academy, a coed prep school Baptist institution in Texas, USA
• Science and Mathematics Academy, Aberdeen High School, Aberdeen, Maryland
• Sekolah Menengah Atas, Indonesian senior high school
• Singapore-MIT Alliance, an educational initiative
• Staunton Military Academy, Charles Town, Virginia

Engineering and technology[link]

• Shape memory alloy, a metal that "remembers" its geometry
• Shared Memory Architecture, a design where a computer graphics chip does not have its own dedicated memory
• Connectors:
  • SMA connector, a type of coaxial radio-frequency connector
  • Optical fiber connector
• SMA Engines, a diesel aircraft engine manufacturer
• SMA Solar Technology, a manufacturer of solar inverters
• Stone mastic asphalt, a type of road surface
• Styrene Maleic Anhydride, a copolymer with high heat properties
• Submillimeter Array, Mauna Kea, Hawaii
• Simplified Memory-Bounded Algorithm SMA*, a memory usage optimising variant of the heuristic A* algorithm to search in trees

Entertainment[link]

• Stop motion animation/animator, where objects are moved by small amounts between frames
• Super Mario Advance, a game in the Mario series
• Super Mario Adventures, an anthology of comics featuring the characters from Nintendo's Mario series*
• "Suggested for Mature Audiences" - a label that was placed on some film advertisements from 1966 to 1968, prior to the MPAA's adoption of its formal Film Rating System.
• Seoul Music Awards

Medicine[link]

• Spinal muscular atrophy, a motor neuron disease, or any of other related conditions known collectively as spinal muscular atrophies
• Superior mesenteric artery, a blood vessel supplying the pancreas and part of the intestine
• Supplementary motor area, part of the sensorimotor cortex
• Sequential Multiple Analysis, the old name for a panel of clinical chemistry lab tests, see Comprehensive metabolic panel

Other uses[link]

• Santa Maria Airport (Azores), an airport in the Azores
• See My Archives (internet lingo)
• Scouts Musulmans Algériens
• Separately managed account, an individual investment account with an asset-based fee structure
• Special Memorandum Account
• Spectral Map Analysis, a multivariate decomposition method with which a Spectramap Biplot visualization is created, developed by Paul Lewi.
• Sergeant Major of the Army, the senior enlisted member of the U.S. Army
• Seoul Metropolitan Area, a region in South Korea
• Shanghai Maple Automobile, an automobile manufacturer based in Shanghai, China
• Simple moving average, the unweighted mean of the previous n data points, when analyzing time series data
• Sir Mix-a-Lot, the stage name of Anthony Ray, a rapper and producer
• "SMA", a 1999 song by hard rock band Chevelle from their first studio album, Point #1

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