DSO may refer to:

Organisations

  • Defence Science Organisation, now known as DSO National Laboratories, Singapore
  • Defense Sciences Office, part of the US Defense Advanced Research Projects Agency
  • Directorate of Special Operations, a South African law-enforcement agency
  • Direct service organisation, a business unit of a United Kingdom local authority
  • Groupe DSO, an Australian headquartered business cooperative

Orchestras

  • Dallas Symphony Orchestra
  • Denver Symphony Orchestra
  • Detroit Symphony Orchestra
  • Diablo Swing Orchestra
  • Dubuque Symphony Orchestra, in Dubuque, Iowa
  • Darwin Symphony Orchestra, in Darwin, Northern Territory, Australia
  • Deutsches Symphonie-Orchester Berlin, in Berlin, Germany
  • Dubrovnik Symphony Orchestra, in Dubrovnik, Croatia
  • Dark Star Orchestra, in Chicago, Illinois, United States
  • Dunedin Symphony Orchestra, New Zealand

Technology

  • Digital sampling oscilloscope, samples measurements and displays or stores them
  • Digital storage oscilloscope, which stores and analyses the signal digitally
  • Direct sparse odometry, a machine vision algorithm for simultaneous localization and mapping
  • Dynamic shared object, in computing
  • Drakensang Online, the online computer game

Astronomy

  • Dark Sky Observatory, Appalachian State University (ASU) facility
  • Deep-sky object, in astronomy

Other uses

  • Distinguished Service Order (disambiguation), several decorations
  • Dark Star Orchestra, a Grateful Dead cover band formed in Chicago, Illinois
  • Diablo Swing Orchestra, a Swedish avant-garde metal band
  • Digital switchover
  • Dental service organizations
  • Days sales outstanding, in accountancy
  • Direct shipping ore, iron ore that can be shipped directly to a steel furnace
  • Distribution system operators, in energy systems
  • Diving safety officer, an administrator of United States university's research diving safety program
  • Defensive Systems Officer, a member of the flight crew responsible for defensive systems
  • Dubai Silicon Oasis, a free-trade zone in Dubai
  • Dobbertin Surface Orbiter, an amphibious vehicle
  • Domestic security officer serving as riot police
  • Sondok Airport, IATA airport code