| Abbreviation | Definition |
|---|---|
| ACLF | Adult and Community Learning Fund |
| ACLF | American Constitutional Law Foundation |
| ACLF | Ander Community Leadership Foundation |
| ACLJ | American Center for Law and Justice |
| ACLS | American Council of Learned Societies |
| ACLT | American Chestnut Land Trust |
| ACLT | Ashland Community Land Trust |
| ACLU | Animals Can Love and Understand |
| ACM | Alliance for Community Media |
| ACM | Amputee Center of Maryland |
| ACM | Association for Computing Machinery |
| ACMA | American Chinese Medicine Association |
| ACMC | The Association of Cost Management Consultants |
| ACMSA | Association of Community Movements for Social Action |
| ACMT | Adrienne Coles Memorial Trust |
| ACNF | Abandoned Children of Nicaragua Foundation |
| ACOA | Adult Children Of Alcoholics |
| ACOA | American College of Oncology Administrators |
| ACOA | Animal Charities Of America |
| ACOG | American College of Obstetricians and Gynecologists |