SCA
- Bureau of South and Central Asian Affairs
- List of country groupings
- McNamara–O'Hara Service Contract Act
- SCA (company)
- SCA (computer virus)
- SCA armoured combat
- Sabah Chinese Association
- Sarawak Chinese Association
- Schuylkill Canal Association
- Scottish Canoe Association
- Screen Composers of America
- Sebastian Conran Associates
- Secular Coalition for America
- Securities and Commodities Authority
- Senate Constitutional Amendment
- Seoul Capital Area
- Service Component Architecture
- Sexual Compulsives Anonymous
- Shuttle Carrier Aircraft
- Sickle cell disease
- Side-channel attack
- Singapore Changi Airport
- Single Connector Attachment
- Small craft advisory
- Society for Creative Anachronism
- Society for Cultural Anthropology
- Société en commandite par actions
- Software Communications Architecture
- Software Composition Analysis
- Solar collector array
- Sony Corporation of America
- South and Central America
- Southern Control Area
- Southern Cross Austereo
- Soviet Central Asia
- Space Centre Australia
- Spectrum continuation analysis
- Spinocerebellar ataxia
- Static code analysis
- Statistical coupling analysis
- Stored Communications Act
- Strong customer authentication
- Student Catholic Action
- Student Conservation Association
- Subsidiary communications authority
- Sudden cardiac arrest
- Suez Canal Authority
- Supercheap Auto
- Superior cerebellar artery
- Supreme Council of Antiquities
- Supreme Court of Albania
- Sustainable competitive advantage
- Swedish Committee for Afghanistan
- Swiss Cricket Association
- Sydney Catchment Authority
- Sydney College of the Arts
- USC School of Cinematic Arts