SMA

SMA may stand for:
* Styrene Maleic Anhydride, a copolymer with high heat properties
* Saint Mary's Academy, Rawalpindi, a private English-medium school in Pakistan
* 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
* Santa Maria Airport (Azores), an airport in the Azores
* 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
* 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
* Simple moving average, the unweighted mean of the previous n data points, when analyzing time series data
* Singapore-MIT Alliance, an educational initiative
* Sir Mix-a-Lot, the stage name of Anthony Ray, a rapper and producer
* Connectors:
** SMA connector, a type of coaxial radio-frequency connector
** Optical fiber connector
* SMA Engines, a diesel aircraft engine manufacturer
* Staunton Military Academy, Charles Town, Virginia
* Stone mastic asphalt, a type of road surface
* Stop motion animation/animator, where objects are moved by small amounts between frames
* Submillimeter Array, Mauna Kea, Hawaii
* Super Mario Advance, a game in the Mario series
* Super Mario Adventures, an anthology of comics featuring the characters from Nintendo's Mario series

Medicine

* Spinal muscular atrophy, a motor neuron disease
* Supplementary motor area, part of the sensorimotor cortex
* Superior mesenteric artery, a blood vessel