Commercial/ government enterprises

• SSA Global Technologies

• SSA Graphics

• Social Security Administration

Computing and data analysis

• Serial Storage Architecture

• Singular Spectrum Analysis

• Static single assignment form, an intermediate representation used in compilers

• Stochastic Simulation Algorithm

• SubStation Alpha, a popular video subtitle editor which allows some advanced display features like positioning, karaoke, and style management

• * .ssa, a file format used by SubStation Alpha

• Super systolic array

Education

• Shady Side Academy, a Pittsburgh-area preparatory school.

• Spiritus Sanctus Academies - a group of schools based in Ann Arbor, Michigan and Granite Bay, California.

• Slip Slidin' Away - A summer camp for up and coming herpetologists based in Camp Chestnut Ridge, Hillsborough, North Carolina.

Government agencies and programs

• Sarva Shiksha Abhiyan, the government of India's Education for All programme

• Secretariat of Health and Assistance (Secretaría de Salud y Asistencia, SSA), health department of Mexico.

• Social Security Administration, an independent agency of the United States government

• Social Security Agency, a government agency in Northern Ireland

• Statistics South Africa, the official South African census agency.

Science

• Steady State Approximation

• Semantic structure analysis

• Semiotic Society of America

• Specific surface area for minerals in m²/g

Chemistry

• Sodium silicoaluminate, also called sodium aluminosilicate, an anti-caking agent

• Sulfosalicylic acid

Medicine

• Sessile serrated adenoma - a type of pre-malignant intestinal polyp.

• Sickle-cell anemia

• Senile systemic amyloidosis

Space Agencies

• Singapore Space Agency

Social and cultural organisations

• Singapore Scout Association

• Singapore Soka Association

Special interest groups

• Shan State Army, a group that supported the separation of Shan State from Myanmar (Burma)

• Slovak Society of Actuaries

• Scottish Socialist Alliance

• Secular Student Alliance, a student organization based in the US

• Soaring Society of America

• Society of Scottish Artists

• Somali Salvation Alliance, a branch of the United Somali Congress

• Föreningen Sveriges Sändareamatörer, an amateur radio organization in Sweden

Other uses

• The IATA airport code for Deputado Luís Eduardo Magalhães International Airport in Salvador, Bahia, Brazil

• Sat Sri Akal, a Sikh Greeting, which means "Immortal God is Truth!"

• Sub-Saharan Africa

• University of Chicago School of Social Service Administration

• SSA or Side-Side-Angle, a faulty proof in mathematics

• Saratoga Soaring Association

• Same sex attraction - term for part of sexual orientation.

• Choral arrangement of female voices only, standing for Soprano 1, Soprano 2 and Alto

• Supply support activity