| Abbreviation | Definition |
|---|---|
| NYAB | National Youth Advisory Board |
| NYAC | National Youth Advisory Council |
| NYAC | Northumberland Youth Advisory Council |
| NYAS | National Youth Advocacy Service |
| NYAT | National Youth Arts Trust |
| NYB | National Youth Ballet |
| NYB | National Youth Band |
| NYB | National Youth Board |
| NYB | National Youth Bureau |
| NYCA | Nepalese Youth for Climate Action |
| NYCK | National Youth Center of Korea |
| NYCL | National Youth Cricket League |
| NYCL | Nottingham Youth Cricket League |
| NYCO | National Youth Choir Of |
| NYCR | National Youth Council of Russia |
| NYCW | National Youth Choir of Wales |
| NYE | National Youth Event |
| NYE | New Youth Entrepreneur |
| NYEP | National Youth Employment Programme |
| NYEP | Native Youth Enrichment Program |