| Abbreviation | Definition |
|---|---|
| NYDIC | National Youth Development Information Center |
| NYF | New York Foundation |
| NYFA | New York Foundation for the Arts |
| NYFOA | New York Forest Owners Association |
| NYG&BS | New York Genealogical and Biographical Society |
| NYHA | New York Heart Association |
| NYHR | New York Horse Rescue |
| NYI | New York Institute of Photography |
| NYLA | New York Library Association |
| NYM | Native Youth Movement |
| NYN | New York Nonprofit |
| NYPIRG | New York Public Interest Research Group |
| NYS | National Youth Sports |
| NYSAAE | New York State Alliance for Arts Education |
| NYSC | National Youth Service Corps |
| NYWICI | New York Women In Communications, Inc. |
| NZAVS | New Zealand Anti-Vivisection Society Incorporated |
| NZFSS | New Zealand Freshwater Sciences Society |
| NZWA | New Zealand Women's Association |
| OA | Overeaters Anonymous |