| Acronym | Definition |
|---|
| DSO | Distinguished Service Order (British military decoration for distinguished service in action) |
| DSO | Dynamic Shared Object |
| DSO | Days Sales Outstanding |
| DSO | Detroit Symphony Orchestra |
| DSO | Dallas Symphony Orchestra |
| DSO | Decision Support Objects |
| DSO | Device Software Optimization |
| DSO | Defense Sciences Office (DARPA) |
| DSO | Digital Storage Oscilloscope |
| DSO | Designated School Official (US Department of Homeland Security) |
| DSO | Dubai Silicon Oasis (Authority; planned community) |
| DSO | Data Source Object |
| DSO | Direct Shipping Ore (bulk economic minerals) |
| DSO | Distribution System Operator (electrical production) |
| DSO | Deep Sky Object |
| DSO | Division Spezielle Operationen (gaming clan) |
| DSO | Deep Sky Object (astronomy) |
| DSO | Departmental Security Officer (Canada) |
| DSO | Domestic Support Obligation (divorce law) |
| DSO | Daily Sales Outstanding |
| DSO | District Staff Officer |
| DSO | Delaware Symphony Orchestra |
| DSO | Digital Switch Over |
| DSO | Deinstitutionalization of Status Offenders |
| DSO | Drunk Sex Orgy |
| DSO | Data Security Officer |
| DSO | Dungeon Sea Online (role-playing game) |
| DSO | Defensive Systems Operator |
| DSO | Detailed Supplementary Objective |
| DSO | Defense Science Organization |
| DSO | Distributed Server Option |
| DSO | Darkstar Orchestra |
| DSO | Designated Senior Official |
| DSO | Defense Subsistence Office |
| DSO | Delta Special Ops (gaming clan) |
| DSO | Domestic Special Order |
| DSO | Defense Spectrum Office |
| DSO | Dekalb Symphony Orchestra (Tucker, Georgia) |
| DSO | DEERS Support Office (US DOD) |
| DSO | Disaster Safety Officer |
| DSO | defensive systems officer (US DoD) |
| DSO | DMDC Support Office |
| DSO | Dear Significant Other |
| DSO | Director of Site Operations (FEMA) |
| DSO | Dobbertin Surface Orbiter |
| DSO | Division of Security Operations (Office of Research Services; US NIH) |
| DSO | Development System Office |
| DSO | Detailed Secondary Objective |
| DSO | Data Set Optimizer |
| DSO | Dynamic Sound-Stage Organiser |
| DSO | Dam Safety Officer (USACE) |
| DSO | Division Security Officer |
| DSO | Database for Solar Observatories (Naples, Italy) |
| DSO | Detailed Science/Supplementary Objective |
| DSO | Defense Systems Operations (US government) |
| DSO | Delayed Service Order |
| DSO | domestic support operation (US DoD) |
| DSO | Discrete Stochastic Optimization |
| DSO | Dover Symphony Orchestra (Dover, DE) |
| DSO | Dulwich Symphony Orchestra (UK) |
| DSO | Disulphide Oil |
| DSO | Discovery System Online |
| DSO | Deputy Supply Officer (Royal Australian Navy) |
| DSO | Distance Spectrum Optimized |
| DSO | Digital Sampling Oscillator |
| DSO | Denora Southern Railroad |
| DSO | Director of Staff Office |
| DSO | Desktop Services Organization |
| DSO | Dropsonde Systems Operator (USAF Hurricane Hunter aircrew meteorological member) |
| DSO | Double Socket Outlet (unswitched) |
| DSO | Distributed System Online (IEEE) |
| DSO | Diablo Swing Orchestra (Swedish band) |
| DSO | Deathspell Omega (band) |
| DSO | Democratic Services Officer |
| DSO | Development Services Office (various locations) |
| DSO | De Standaard Online (Belgian newspaper) |
| DSO | Drug Safety Officer (various companies) |