| Acronym | Definition |
|---|
| NSO➣National Statistics Office (Philippines) |
| NSO➣National Symphony Orchestra |
| NSO➣New Student Orientation |
| NSO➣Nashville Symphony Orchestra (Nashville, TN) |
| NSO➣National Statistical Office |
| NSO➣Novosibirskaya Oblast (Russian federal subject) |
| NSO➣Nintendo Switch Online (paid online gaming service) |
| NSO➣National Solar Observatory |
| NSO➣Nalu Service Object |
| NSO➣Names Supporting Organization |
| NSO➣Naming Service Object |
| NSO➣Nevada Site Office |
| NSO➣Nurses Service Organization (liability insurance company) |
| NSO➣National Service Officer (Disabled American Veterans) |
| NSO➣Northern Spotted Owl |
| NSO➣No Such Organization (Vassar University; Poughkeepsie, NY) |
| NSO➣Network Security Officer |
| NSO➣Nonqualified Stock Option |
| NSO➣Nevada Solar One (Boulder City, NV) |
| NSO➣Nederlands Studenten Orkest (Dutch: Netherlands Student Orchestra) |
| NSO➣Northern Star Online (Minnesota) |
| NSO➣Neighbourhood Specialist Officer (UK) |
| NSO➣Newfoundland Symphony Orchestra (Canada) |
| NSO➣New Store Opening |
| NSO➣National Security Office(r) |
| NSO➣National Census and Statistics Office (Philippines) |
| NSO➣National Sales Organizations |
| NSO➣North Sydney Oval |
| NSO➣National Socialist Society (political group; Russia) |
| NSO➣NATO Standardization Organization |
| NSO➣National Safeman's Organization |
| NSO➣Numeric Stockage Objective |
| NSO➣New Student Outreach |
| NSO➣Nonferrous Smelter Order |
| NSO➣Network Systems & Operations |
| NSO➣Nuclear Safety Officer |
| NSO➣Non-Subscriber Order |
| NSO➣Non-Skating Official (roller derby) |
| NSO➣Natural Spin Orbital(s) |
| NSO➣Naval Staff Officer |
| NSO➣Non-SIOP Option |
| NSO➣Nuclear Safe Orbit |
| NSO➣Nuclear Support Office |
| NSO➣Navy Subsistence Office |
| NSO➣Non-Standard Option |
| NSO➣Navy Supply Officer |
| NSO➣Non Standard Operation |
| NSO➣Neutral Start Output |
| NSO➣Non-Streaming Overhead |
| NSO➣Nail Solution for Onychomycosis |
| NSO➣Normal Sustained Operations |
| NSO➣NATO (North Atlantic Treaty Organizations) School Oberammergau (Oberammergau, Germany) |
| NSO➣National Support Officer |