| Abbreviation | Definition |
|---|---|
| ALSA | Amyotrophic Lateral Sclerosis Association |
| ALSAC | American Lebanese Syrian Associated Charities |
| ALSAR | Association of Lowland Search And Rescue |
| ALSC | Assistance League of Southern California |
| ALSC | At Large Study Committee |
| ALSC | Australian Lawyers and Social Change |
| ALSF | Alex's Lemonade Stand Foundation for Childhood Cancer) |
| ALSMI | Amyotrophic Lateral Sclerosis of Michigan |
| ALST | Aboriginal Legal Services of Toronto |
| ALZ-GMC | Alzheimer's Association - Greater Michigan Chapter |
| AM | Amor Ministries |
| AMA | American Music Abroad |
| AMA | Argentinean Manitoban Association |
| AMAB | Associazione Mediterannea Agricoltura Biologica |
| AMAC | Adults Molested As Children |
| AMAC | Association for Mature and Aging Citizens |
| AMAF | American Medical Association Foundation |
| AMANDA | Automated Members Article And News Delivery Agent |
| AMARC | World Association of Community Radio Broadcasters |
| AMBA | Australian Multiple Birth Association |