| Abbreviation | Definition |
|---|---|
| 2RT | too right |
| AAFU | All American Families United |
| AANY | Alcohol Awareness for Navajo Youth |
| AAY | Access for Autistic Youth |
| AAYA | All American Youth Activities |
| AAYA | Anson Athletic Youth Association |
| AAYF | Addis Ababa Youth Forum |
| AAYT | Arthur Ashe Youth Tennis |
| ABIGAIL | Abigail in Scottish means Father's joy |
| ABYF | Aloha Baptist Youth Fellowship |
| ABYL | Acton Boxborough Youth Lacrosse |
| ACYA | Australia China Youth Association |
| ACYF | Administration for Children Youth and Families |
| ACYF | Administration on Children Youth and Families |
| ACYF | All China Youth Federation |
| ACYF | American Canyon Youth Football |
| ACYF | Arctic Children and Youth Foundation |
| ACYF | Australian Catholic Youth Festival |
| ACYW | Associate of the Community and Youth Work |
| ACYW | Austin County Youth Wrestling |