Osa or OSA may refer to:

Places

  • Osa Peninsula, in Costa Rica
  • Osa (canton), in the province of Puntarenas in Costa Rica
  • Osa Conservation Area, an administrative area in Costa Rica
  • Osa, India, a village in Allahabad, India
  • Osa, Iran, a village in Mazandaran Province, Iran
  • Osa, Warmian-Masurian Voivodeship, north Poland
  • Osa, a minor tributary of the Vistula, Poland
  • Osa, Norway, a village in Ulvik municipality, Vestland county, Norway
  • Osa, Russia, the name of several inhabited localities in Russia
  • Osa, Missouri, a community in the United States

Military

  • Osa-class missile boat
  • 9K33 Osa (SA-8 Gecko), a Soviet surface-to-air missile launcher
  • M79 Osa, a Serbian/Yugoslav rocket launcher
  • Avia B.122 Osa, a Czech trainer aircraft
  • Osa (handgun) a Russian non-lethal handgun
  • Osa (drone), Ukrainian uncrewed aerial vehicle (UAV)

Schools

  • Oakland School for the Arts
  • Old Scona Academic High School, a school in Edmonton, Canada

Science and technology

  • Optical spectrum analyzer
  • Osa (plant), a monotypic genus of plant in the family Rubiaceae

Medicine

  • Obstructive sleep apnea, a sleep-related breathing disorder in which upper airway obstruction leads to reduced breathing that interrupts normal sleep
  • Osteosarcoma, a malignant neoplasm of bone

Computing

  • Open Scripting Architecture, for AppleScript
  • Open Services Access, a set of standards for mobile telecommunications
  • Online Sexual Activity
  • Open Systems Adapter, an IBM card for mainframes
  • Open systems architecture, a telecommunication standard

Businesses and organizations

  • Oceania Swimming Association
  • Ontario Soccer Association
  • Ontario Society of Artists
  • Open Solutions Alliance
  • Optical Society of America, now Optica
  • Optimization Systems Associates, a defunct American software company
  • Order of Saint Anna, a Russian order of chivalry
  • Order of Saint Augustine (Ordo Sancti Augustini), the Roman Catholic Augustinian order
  • Oregon Student Association
  • Organization of the Secret Army, French far-right nationalist group in Algeria
  • OSA, a Czech Republic performance rights organisation
  • Oriental Society of Australia, now the Australian Society for Asian Humanities
  • OSA Group, a Constructivist architectural association of the 1920s based in the USSR
  • The Odisha Society of the Americas
  • Intelligence-Security Agency of Bosnia and Herzegovina (Obavještajno sigurnosna / bezbjednosna agencija, or OSA-OBA), an intelligence and security agency of Bosnia and Herzegovina
  • Office of the Science Advisor, of the United States Environmental Protection Agency
  • Office of Special Affairs, a controversial department of the Church of Scientology
  • Operation Save America

People

  • Sumire Haruno, Japanese actress, nicknamed Osa
  • Osa Maliki (1907–1969), Indonesian politician
  • Osa Massen (1914–2006), Danish actress
  • Osa Odighizuwa (born 1998), American football player
  • Lars Osa (1860–1958), Norwegian artist

Other uses

  • Old Stone Age or Paleolithic
  • Office of Secret Actions, a fictional government department in the video game Return to Castle Wolfenstein
  • Official Secrets Act, legislation in several countries
  • Online Safety Act 2023, United Kingdom legislation
  • Online savings account
  • Open skies agreement
  • Osaka International Airport (former IATA code: OSA)

See also

  • Ossa (disambiguation)