| Abbreviation | Definition |
|---|---|
| NOYO | Northern Ohio Youth Orchestra |
| NPCO | New Palm Court Orchestra |
| NPMB | Northland Pines Music Boosters |
| NPOI | New Philharmonic Orchestra of Irving |
| NPQ | New Plainsmen Quartet |
| NPSO | Nassau Pops Symphony Orchestra |
| NPSO | National Preparatory School Orchestras |
| NQC | National Quartet Convention |
| NR | Night Raid |
| NRA | New Revolving Age |
| NRAM | Northern Rivers Academy of Music |
| NRBQ | New Rhythm and Blues Quartet |
| NRBQ | New Rhythm Blues Quartet |
| NRO | National Repertory Orchestra |
| NRR | New Rock Revolution |
| NS | Natural Sound |
| NSAI | Nashville Songwriters Association International |
| NSCE | North Shore Celtic Ensemble |
| NSCM | North Shore Chamber Music |
| NSCM | Northern School of Contemporary Music |