| Abbreviation | Definition |
|---|---|
| NPRA | National Petrochemical Refiners Association |
| NPRA | Norwood Park Residents Association |
| NPRA | Nottingham Park Residents Association |
| NPSB | National Professional Standards Board |
| NPTA | National Property Taxpayers Association |
| NQAA | North Queensland Afforestation Association |
| NQF | National Quality Forum |
| NQI | National Quality Institute |
| NQI | Nursing Quality Institute |
| NRA | National Registration Association |
| NRA | National Rehabilitation Association |
| NRA | National Rescue Association |
| NRA | National Riffle Association |
| NRA | National Rifles Association |
| NRA | Nudist Rifle Association |
| NRACRDF | National Rifle Association Civil Rights Defense Fund |
| NRAEF | National Restaurant Association Education Foundation |
| NRAEF | National Restaurant Association Education Foundations |
| NRAEF | National Restaurant Association Educational Foundation |
| NRAF | National Rifle Association Foundation |