Other
- Airport IATA Code for Siassi
- Same Store Sales, a measure to gauge the development of retail revenues
- Satellite Syndicated Systems, a company that provided distribution of data via communications satellite
- SATS Security Services, provider of security services for aviation-related activities at the Singapore Changi Airport
- Saunders Secondary School, a high school in London, Ontario, Canada
- Sea Scout Ship, part of the Sea Scouting program
- Sport Searching School, the fictional school from Sport Ranger
- Second sound shift
- Secret Stadium Sauce
- Selective Service System, the United States military conscription program
- Sega Soccer Slam
- Senior Staff Sergeant, a rank in the Singapore Police Force
- Shoot, shovel, and shut up, an often illegal method for dealing with unwanted animals in rural areas
- Siding Spring Survey, a Near-Earth Object search program based Siding Spring Observatory, N.S.W., Australia
- Side-side-side – see congruence of triangles and solution of triangles
- Sign Supported Speech, a combination of sign language and English speech
- Singapore Sports School
- Soccer-specific stadium, a sports stadium whose primary (but not only) purpose is to host soccer matches
- Social security system
- Southern Cross Station (formerly Spencer Street Station), a major railway station in Melbourne, Australia, in the state of Victoria.
- Southwood Secondary School, a high school in Cambridge, Ontario
- Standard scratch scoring, a golf scoring system
- St. Stephen's Episcopal School, Austin, Texas, a private school in Austin, TX
- State Security Service, Nigerian domestic intelligence agency
- Streetsville Secondary School, a high school in Mississauga, Ontario, Canada
- Sudbury Secondary School, a high school in Greater Sudbury, Ontario, Canada
- Sutton's Sign Symbol Sequence, now the International Movement Writing Alphabet, an ordered set of symbols used to record movement
- Sun, Sand and Surf - as a form of tourism, sometimes substituted by Sand, Sea and Sex
- Súper Sábado Sensacional, a variety show from Venezuela that airs on Venevision
- Super Special Stage, a competitive section in a stage rally (motorsports) event
- Super Steady Shot, Sony's Image stabilization Technology name
- Joycard Sanusui SSS, a controller for the Nintendo Entertainment System
- SSS islands, part of the Netherlands Antilles
- SSS (Three-Speed), a fictional character from the anime series MADLAX
- Solid State Society, the movie sequel to Ghost in the Shell: Stand Alone Complex
- Svensk Socialistisk Samling, Swedish Socialist Unity, former Swedish Nazi party
- Swedish Swing Society, a Swedish dance club of some importance in the lindy hop revival
- Smithfield-Selma High School a high school in Smithfield, North Carolina
- Sakal, Sakali, Saklolo, a 2007 Filipino film
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