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| NIVA | NJHC | NJR | NJRR | NJVMA | NK |
| NKA | NKCA | NKD | NKDA | NKFA | NKH |
| NKOA | NKT | NL | NL&D | NLBP | NLC |
| NLD | NLGLP | NLH | NLIC | NLK | NLM |
| NLMS | NLN | NLOP | NLP | NLPA | NLR |
| NLR(s) | NLS | NLST | NM | NMA | NMAC |
| NMAS | NMC | NMCP | NMCSD | NMD | NMDA |
| NMDAR | NME | NMET | NMF | NMH | NMHCC |
| NMHDU | NMIS | NMJ | NMO | NMOL | NMP |
| NMPF | NMPL | NMR | NMRI | NMS | NMSC |
| NMSP | NMT | NMU | NMU1 | NMU2 | NMUC |
| NMUH | NMUR | NMVMA | NMWA | NMWC | nn |
| NN4B | NND | NNED | NNFF | NNH | NNMC |
| NNNSV | NNP | NNR | NNRTI | NNT | NOAEL |
| NOAEL(s) | NOAH | NOBD | NOC | noct | NOCTE |
| NOD | NOF | NOK | NOLC | NOLG | NOMC |
| NOMD | NOMF | NOMI | NOMIS | NOMP | NOMR |