SSO may refer to:

Organizations

  • Sarasota County Sheriff's Office, a law enforcement agency in Sarasota County, Florida, US
  • Social Security Organization, a social welfare organization in Iran
  • Special Security Office, a function to disseminate sensitive information in the US federal government and armed forces
  • Special Security Organization, a former Iraqi security agency
  • Special Source Operations, a division of the US National Security Agency that collects digital data
  • Standards Setting Organization, a group developing, producing or maintaining technical standards
  • SSO VS, Russian Special Operations Forces (Sily Spetsial'nykh Operatsiy)
  • SSO ZSU, Ukrainian Special Operations Forces (Syly Spetsialʹnykh Operatsiy)
  • SSO, Belarusian Special Operations Forces
  • Society of Surgical Oncology

Orchestras

  • Salford Symphony Orchestra, England
  • Saskatoon Symphony Orchestra, Canada
  • Scottish Symphony Orchestra, Scotland
  • Seattle Symphony Orchestra, US
  • Shreveport Symphony Orchestra, US
  • Singapore Symphony Orchestra, Singapore
  • Southern Syncopated Orchestra, an early US jazz group that toured the UK and Ireland 1919–21
  • Springfield Symphony Orchestra, US
  • Stavanger Symphony Orchestra, Norway
  • Sudbury Symphony Orchestra, Canada
  • Sydney Symphony Orchestra, Australia
  • Syracuse Symphony Orchestra, US

Arts and entertainment

  • Starship Operators, a Japanese sci-fi novel and anime television series
  • Super Surgical Operation, a Japanese video game also known as Trauma Center: Under the Knife

Science and technology

Spaceflight

  • Scaled Composites SpaceShipOne, the vehicle used in the first privately funded human spaceflight
  • Semi-synchronous orbit, a type of orbit
  • Single-stage-to-orbit, a reusable vehicle that reaches space without jettisoning hardware
  • Space Shuttle Orbiter, a reusable space vehicle formerly operated by NASA
  • Sun-synchronous orbit, a type of orbit
  • Swiss Space Office, national space program of Switzerland

Computing

  • Single sign-on, allowing access to multiple software systems using one login
  • Structure, sequence and organization, a US legal term relating to computer programs and copyright
  • Small string optimization

Electronics

  • Simultaneous switching output, also known as simultaneous switching noise (SSN), or ground bounce

Astronomy

  • Siding Spring Observatory, an astronomical observatory in Australia
  • Solar System Object

Other uses

  • Sanitary sewer overflow, when untreated sewage is discharged into the environment
  • Senior station officer (New Zealand Fire Service), a rank in the New Zealand Fire Service
  • Source-separated organics, a system for separating compostable materials from other waste streams
  • Student Switch Off, a UK-based energy saving campaign
  • Sydney Star Observer, an LGBT newspaper in Sydney, Australia
  • South Sudan Oyee!, the national anthem of South Sudan.
  • Subsynchronous oscillations in an electrical grid

See also

  • Sso (ethnic group), of southern Cameroon
  • Sso (rite), an initiation rite once practised by the Beti of Cameroon
  • SS0, a postcode in the SS postcode area