| Acronym | Definition |
|---|
| NDO | Non Degree Option (education) |
| NDO | Nido Petroleum Limited (Australia) |
| NDO | National Demining Office |
| NDO | Naturopathic Doctors Ontario (Ontario, Canada) |
| NDO | Neurogenic Detrusor Overactivity (nervous control mechanisms disorder) |
| NDO | National Debt Office (UK) |
| NDO | Neglect of Differential Overlap |
| NDO | .NET Data Objects (trademark of House of Tools Development GmbH; Germany) |
| NDO | Natural Draft Opening |
| NDO | New Deadly Order (gaming clan) |
| NDO | Network Design Office (Campus Information Technologies and Educational Services; University of Illinois at Urbana-Champaign) |
| NDO | Ninth District Opportunity, Inc. (low-income assistance; Gainesville, GA) |
| NDO | Novell Data Object |
| NDO | Notre-Dame des Oiseaux (Catholic schools; Paris, France) |
| NDO | National Database Organization (Pakistan) |
| NDO | Navy Disbursing Office |
| NDO | New Development Opportunities |
| NDO | National Development Organisation |
| NDO | Night and Day Orchestra (Beaumont, TX) |
| NDO | National Dialling Only (telecommunications; UK) |