| NRO | N Retinylidene Opsin 
| Others |
| NRO | Narrow Rim Option
| Others |
| NRO | National Reconciliation Order
| Others |
| NRO | National Reconciliation Ordinance
| Others |
| NRO | National Reconditioning Order
| Others |
| NRO | National Reconnaissance Office
| Others |
| NRO | National Recruitment Office
| Others |
| NRO | National Registration Organization
| Others |
| NRO | National Repertory Orchestra
| Others |
| NRO | National Review Online
| Others |
| NRO | National Roaming Operator
| Others |
| NRO | NCR Retail Online
| Others |
| NRO | Neighborhood Resource Officer
| Others |
| NRO | Neighborhood Resource Officers
| Others |
| NRO | Neighborhood Resource Organization
| Others |
| NRO | Neighborhood Resources Officers
| Others |
| NRO | Network Roll Out
| Others |
| NRO | New Restaurant Opening
| Others |
| NRO | Niangua River Oasis
| Others |
| NRO | Nichtregierungsorganisation
| Others |
| NRO | Non Recording Option
| Others |
| NRO | Non Repudiation of Origin
| Others |
| NRO | Non Resident Ordinary
| Others |
| NRO | Non Residential Ordinary
| Others |
| NRO | North River Outfitter
| Others |
| NRO | North River Outfitters
| Others |
| NRO | Northeastern Regional Organization
| Others |
| NRO | Northern Regional Office
| Others |
| NRO | Nucleus Raphe Obscurus
| Others |
| NRO | Number Resource Organization
| Others |
| NRO | Number Resources Organization
| Others |
| NRO | Numbering Resources Optimization
| Others |