| Abbreviation | Definition |
|---|---|
| ARMY | Anointed Radical Missionary Youth |
| ARMY | Another Regimented Mad Youth |
| ARMY | Army Ruins My Youth |
| ARY | Arts Reaching Youth |
| ARY | At Risk Youth |
| ARYA | Afghan Renascent Youth Association |
| ARYA | Agriculture Research Youth Award |
| ASAYI | Anti STI AIDS Youth International |
| ASPYN | A Safer Place Youth Network |
| ASY | Alternative Solutions for Youth |
| ASYA | Agusan Surigao Youth Assembly |
| ASYC | All State Youth Choir |
| ASYCO | All-State Youth Choir and Orchestra (Kentucky Baptist Convention) |
| ASYT | Australian Sailing Youth Team |
| ATLAS | Adolescents Training and Learning to Avoid Steroids |
| ATY | Alaska Theatre of Youth |
| ATYP | Academically Talented Youth Programs |
| AUYWG | African Union Youth Working Group |
| AVARY | Alternative Ventures for At Risk Youth |
| AVYD | Assembly of Vietnamese Youth for Democracy |