the production code for the 1973 Doctor Who serial Planet of the Daleks Government and politics Selective Service System, the United States' military conscription program Social security system Social Security System (Philippines) State Security Service, Nigerian domestic intelligence agency Svensk Socialistisk Samling, Swedish Socialist Unity, former Swedish Nazi party Linguistics Sign Supported Speech, a combination of sign language and English speech Sutton's Sign Symbol Sequence, now the International Movement Writing Alphabet, symbols to record movement Other SATS Security Services at Singapore Changi Airport Senior Staff Sergeant, a rank in the Singapore Police Force Super SteadyShot, Sony image stabilization system