| Abbreviation | Definition |
|---|---|
| NYRB | Nevada Youth Recreational Baseball |
| NYRB | New York Red Bulls |
| NYRR | New York Road Runners |
| NYSB | New York Sports Bar |
| NYSC | New York Sports Club |
| NYSC | New York Sports Clubs |
| NYSD | North Yorkshire/South Durham (cricket league) |
| NYSL | Norfolk Youth Soccer League |
| NYSPHSAA | New York State Public High School Athletic Association |
| NYT | New York Technics |
| NYY | New York Yankees |
| NYYC | New York Yacht Club |
| NZC | New Zealand Cricket |
| NZCC | New Zealand Cricket Council |
| NZGC | New Zealand Golf Club |
| NZPCA | New Zealand Pony Clubs Association |
| NZRFU | New Zealand Rugby Football Union |
| NZRU | New Zealand Rugby Union |
| NZU | New Zealand Underwater hockey league |
| NZUDC | New Zealand Universities Debating Council |