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| NOPLAN | NOPP | NOPT | NOPUS | NOQ | NOR |
| NORAD | NORDO | NORDSAT | NorGov | NORM | NORS |
| NORTHAG | NOS | NOSB | NOSC | Nose Candy | NOSL |
| NOSM | NOSP | NOSS | NOSSA | NOTAL | NOTAM |
| NOTD | NOTMAR | NOTS | NOV | NOVA | NOW |
| NOWCC | NOWL | NOYS | NOZ | NP | NPA |
| NPAA | NPAT | NPB | NPC | NPCA | NPCC |
| NPCR | NPD | NPDA | NPDES | NPDL | NPDS |
| NPE | NPES | NPF | NPFD | NPFI | NPG |
| NPGS | NPHL | NPI | NPIAS | NPIC | NPK |
| NPL | NPLD | NPN | NPNI | NPO | NPOES |
| NPOI | NPP | NPPA | NPPD | NPPES | NPQ |
| NPR | NPRC | NPRG | NPRM | NPRV | NPS |
| NPSB | NPSD | NPSH | NPSP | NPT | NPTH |
| NPTO | NPTS | NPU | NPV | NPW | NPY |
| NQ | NQAI | NQB | NQG | NQI | NQP |
| NQR | NQZ | NQZC | NR | NR/T | NRA |