| Abbreviation | Definition |
|---|---|
| NYSL | Natomas Youth Soccer League |
| NYSL | Neighborhood Youth Soccer League |
| NYSL | Niles Youth Soccer League |
| NYSP | National Youth Sports Program |
| NYSR | National Youth Sports Radio |
| NYSR | National Youth Survey Report |
| NYT | National Youth Theatre |
| NYTS | National Youth Tobacco Survey |
| NYTT | Nutmeg Youth Triathlon Team |
| NYUK | Nazarene Youth United Kingdom |
| NYW | National Youth Week |
| OACAS | Ontario Association of Children’s Aid Societies |
| OAY | Organisation of African Youth |
| OAYA | Orion Area Youth Assistance |
| OAYA | Outstanding Achievement Youth Award |
| OBY | Oakdale Baptist Youth |
| OCYC | Ontario Coptic Youth Convention |
| OCYP | Office of Child and Youth Protection |
| ODY | Oakland Division Youth |
| ODY | Office of Diné YOUTH |