| Acronym | Definition |
|---|
| NRR | Noise Reduction Rating |
| NRR | Nuclear Reactor Regulation |
| NRR | Net Reproduction Rate (fertility) |
| NRR | Office of Nuclear Reactor Regulation |
| NRR | Nederlandse Reanimatie Raad (Dutch: Dutch Resuscitation Council) |
| NRR | National Research Register |
| NRR | National Risk Register (UK) |
| NRR | Net Run Rate (cricket) |
| NRR | Nuclear Receptor Resource (project; Georgetown University; Washington, DC) |
| NRR | Non Repudiation of Receipt (electronic commerce) |
| NRR | North Reading Room (various locations) |
| NRR | Nuclear Regulatory Research |
| NRR | National Registration Regulations (Australia) |
| NRR | Nutrition Research Reviews (journal) |
| NRR | No Response Required |
| NRR | Neuroretinal Rim (optic nerve) |
| NRR | Nakanoshima Rapid Railway (Osaka, Japan) |
| NRR | Nascom Reconfiguration Request |
| NRR | National Recording Registry |
| NRR | Navesink River Rowing (New Jersey) |
| NRR | Non-Recurring Revenue |
| NRR | Navy Research Requirements |
| NRR | Nonunit Related Record |
| NRR | Naval Research Requirement |
| NRR | Nuclear Reactor Robot (Earthbound game) |
| NRR | Network Requirements Review (acquisition process) |
| NRR | Number of Reserved Registers |
| NRR | No Rules Radio (Internet radio) |
| NRR | Neurological Rehabilitation Resources (Thornton, CO) |
| NRR | Nationwide Rip Ridaz (band) |