| Abbreviation | Definition |
|---|---|
| MYS | Memphis Youth Symphony |
| MYS | Metropolitan Youth Symphony |
| MYS | Michigan Youth Symphony |
| MYS | Minnesota Youth Symphonies |
| MYSA | Mathare Youth Sports Association |
| MYSA | Missouri Youth Soccer Association |
| MYSEC | Moroccan Youth Social Entrepreneurs Camp |
| MYSL | Michigan Youth Soccer League |
| MYSL | Middleborough Youth Softball League |
| MYSL | Middlebury Youth Soccer League |
| MYSL | Middlesex Youth Soccer League |
| MYSL | Midlothian Youth Soccer League |
| MYSL | Minnesota Youth Ski League |
| MYSL | Mission Youth Soccer League |
| MYSL | Murrieta Youth Soccer League |
| MYSP | Massachusetts Youth Symphony Project |
| MYSP | Memphis Youth Symphony Program |
| MYT | Midwest Youth Tournaments |
| MYTA | Malta Youth Triathlon Academy |
| MYTE | Mentoring Youth Through Empowerment |