DSO

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 operator, 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