DSO

DSO may refer to:

Decorations

• Distinguished Service Order refers to a number of decorations

Music

• Dallas Symphony Orchestra
• Dark Star Orchestra
• Deathspell Omega, a French black metal band
• Detroit Symphony Orchestra
• Deutsches Symphonie-Orchester Berlin
• Diablo Swing Orchestra

Computers and electronics

• Digital Sampling Oscilloscope, samples measurements and displays or stores them
• Digital storage oscilloscope
• Dynamic Shared Object, a library of subroutines in Unix-like systems

Entertainment

• Dark Sun Online
• Dark Star One

Other

• Days Sales Outstanding
• Deep sky object
• Defence Science Organisation, now known as DSO National Laboratories, Singapore
• Defense Sciences Office, one of the seven program offices of the US Defense Advanced Research Projects Agency
• Direct Shipping Ore, referring to iron ore that can be shipped directly to a steel furnace
• Directorate of Special Operations, South African law-enforcement agency
• Distribution system operator in the electricity supply industry
• Diving safety officer
• Division Special Operations Division Spezielle Operationen, part of Germany's Bundeswehr
• Drug Supply Organisation
• Dubai Silicon Oasis, corporate free zone in UAE
• Groupe DSO, Australian headquartered business cooperative