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
 * 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, USA

Technology

 * Digital Sampling Oscilloscope, samples measurements and displays or stores them
 * Digital storage oscilloscope, which stores and analyses the signal digitally
 * Dynamic Shared Object, in computing
 * Drakensang Online, the online computer game

Astronomy

 * Dark Sky Observatory, Appalachian State University (ASU)
 * 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
 * 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