| Acronym | Definition |
|---|
| NRG | Energy |
| NRG | NRG Energy, Inc. |
| NRG | Natural Resources Group |
| NRG | Nature Reviews Genetics (journal) |
| NRG | Numerical Renormalization Group (method for Kondo problem) |
| NRG | NMR Restraints Grid (chemical database) |
| NRG | Nero Image |
| NRG | Norton Registration Entries |
| NRG | Network Referral Group |
| NRG | Nokia River Golf (Finland) |
| NRG | New Radiancy Group |
| NRG | New Resource Group |
| NRG | Non-Regulatory Guidance |
| NRG | Nautical Research Guild (Cuba, NY) |
| NRG | Neuromuscular Research Group (various organizations) |
| NRG | Northern Realty Group (Ft. Worth, TX) |
| NRG | Notional Requirements Generator (US DoD) |
| NRG | Network Resource Grapher |
| NRG | New Rock Guitars |
| NRG | National Reserve Grant |
| NRG | Numerics Rapporteur Group |
| NRG | Neuroprosthetics Research Group |
| NRG | Newport Robotics Group |
| NRG | Neuwieder Ruder-Gesellschaft |
| NRG | Next Rave Generation |
| NRG | National Research Guild |
| NRG | New Rave Generation |
| NRG | Nations Racing Group (gaming clan) |
| NRG | New Royal Guards (gaming clan) |