| Abbreviation | Definition |
|---|---|
| AACP | Association of Adventist Camping Professionals |
| AAGS | All About Girl Scouts |
| AAMES | Association of African Methodist Episcopal Scouters |
| ABR | Active Backwoods Retreat |
| ABSL | Assistant Beaver Scout Leader |
| AESU | Argus Explorer Scout Unit |
| AGGL | Association des Girl Guides Luxembourgeoises |
| AGS | American Girl Scouts |
| AGSE | Association des Guides et Scouts d'Europe |
| AHG | American Heritage Girls |
| AO | Altogether Outdoors |
| APL | Assistant Patrol Leader |
| APRO | Aims Policy Rules Organisation |
| ARIES | Automotive Recon Interplanetary Exo Scout |
| ARSA | All-Russian Scout Association |
| ASCCI | Association des Scouts Catholiques de Côte d'Ivoire |
| ASCI | Associazione Scouts Cattolici Italiani |
| ASEI | Associazione Scout Evangelici Italiani |
| ASL | Assistant Scout Leaders |
| ASOSCOUTS | ASOciación de SCOUTS de Guatemala |