SSA

SSA may refer to:

Geography

 * Sub-Saharan Africa

Organizations

 * Sainsbury's Staff Association, of Sainsbury's, UK
 * Scottish Socialist Alliance, a coalition of left-wing bodies, fore-runner to the Scottish Socialist Party
 * Seismological Society of America, international scientific society founded1906
 * Shan State Army, a former insurgent group in Burma
 * Shipconstructors' and Shipwrights' Association, a former British trade union
 * Singapore Scout Association, youth movement founded 1910
 * Slovak Society of Actuaries (Slovenská spoločnosť aktuárov), professional association in Slovakia
 * Soaring Society of America, American sporting society founded in 1932
 * Society for the Study of Addiction, UK learned society with charitable status
 * Society of Scottish Artists, artists society founded in 1891
 * SSA Global Technologies, American software company acquired by Infor Global Solutions
 * Steamship Authority, a Massachusetts ferry service and regulatory body
 * Sudan Studies Association, US professional association
 * Swedish Society of Radio Amateurs, an amateur radio organization

Education

 * School of Saint Anthony, Quezon City, Philippines
 * Secular Student Alliance, US
 * Shady Side Academy, Pittsburgh, Pennsylvania, US

Government

 * Saudi Space Agency, Saudi government agency
 * Social Security Administration of the US government
 * Social Security Agency (Northern Ireland)
 * Selective Service Act of 1917, an American piece of legislation signed by President Woodrow Wilson during WWI that established nationwide conscription
 * State Security Agency (South Africa), the South African intelligence service

Computing

 * Stochastic Simulation Algorithm
 * Serial Storage Architecture
 * Singular Spectrum Analysis
 * Software Security Assurance
 * Solid State Array, in flash data storage using solid-state drives
 * Start of Selected Area, a control character in the C1 control code set
 * Static single-assignment form, a property of intermediate representations used in compilers
 * Stationary Subspace Analysis
 * Strong subadditivity of quantum entropy
 * SubStation Alpha and .ssa file format, a video subtitle editor
 * Super systolic array

Science

 * Semantic structure analysis
 * Single-strand annealing in homologous recombination
 * Side-side-angle in geometry for solving triangles
 * Specific surface area, a property of solids

Medicine

 * Anti-SSA/Ro autoantibodies
 * Senile systemic amyloidosis
 * Sessile serrated adenoma, a type of pre-malignant intestinal polyp
 * Special somatic afferent
 * Sulfosalicylic acid

Other uses

 * IATA code of Salvador Bahia Airport
 * ESA Space Situational Awareness Programme
 * Sarva Shiksha Abhiyan, the Government of India's Education for All programme
 * Self-sampling assumption
 * Serious Sam Advance, a 2004 video game
 * Shared services agreement
 * Slippery slope argument, a rhetorical device (and often a fallacy)
 * Special Service Agreement between the UN and a contractor
 * Special services area or business improvement district
 * SSA, Grand Cross of the Order of the Star of South Africa
 * Supervisory Special Agent