DSO

• Dallas Symphony Orchestra
• Dark Sky Observatory
• Dark Star Orchestra
• Darwin Symphony Orchestra
• Days sales outstanding
• Deep-sky object
• Defence Science Organisation
• Defense Sciences Office
• Dental Service Organizations
• Denver Symphony Orchestra
• Detroit Symphony Orchestra
• Deutsches Symphonie-Orchester Berlin
• Diablo Swing Orchestra
• Digital storage oscilloscope
• Direct Shipping Ore
• Direct service organisation
• Directorate of Special Operations
• Distinguished Service Order (disambiguation)
• Diving safety officer
• Dobbertin Surface Orbiter
• Drakensang Online
• Dubai Silicon Oasis
• Dubrovnik Symphony Orchestra
• Dubuque Symphony Orchestra
• Dynamic Shared Object
• Electric power distribution
• Groupe DSO
• Oscilloscope
• Weapon systems officer