| Abbreviation | Definition |
|---|---|
| NRRM | National or Regional Return Management |
| NRS | New Revised Standard |
| NRTI | National Retail Traffic Index |
| NRU | Never Rung Up |
| NS | not stated |
| NSBP | National Small Business Pooling |
| NSC | Nouvelle Systeme de Cotation |
| NSCC | National Securities Clearing Corporation |
| NSD | New Service Development |
| NSEC | National Supported Employment Conference |
| NSFAS | National Student Financial Aid Scheme |
| NSI | Net Spendable Income |
| NSM | Net Shape Manufacturing |
| NSMS | National Stock Market System |
| NSO | No Such Order |
| NSRO | National Self Reliance Organization |
| NSTS | National Securities Trading System |
| NSTS | NHS Strategic Tracing Service |
| NSY | Naval Ship Yard |
| NT | New Technologies |