| Abbreviation | Definition |
|---|---|
| AC | After Creation |
| AC | Anti Christ |
| AC/DC | Anti-Christ Devils Children |
| ACA | Alabama Christian Academy |
| ACAA | Allegheny Christian Athletic Association |
| ACAP | Adventist Composers, Arrangers, and Poets |
| ACAP | Associazione Cabotaggio Armatori Partenopei |
| ACAP | Atlanta Christian Apologetics Project |
| ACBC | Adventist Christian Book Center |
| ACC | Anglican Church of Canada |
| ACC | Archdeaconry Court of Cornwall |
| ACC | Arusha Community Church |
| ACC | Associated Catholic Colleges |
| ACC | Austin Chinese Church |
| ACCA | Adams County Christian Academy |
| ACCA | Apostolic Christian Church of America |
| ACCA | Association for Christian College Athletics |
| ACCA | Association of Christian College Athletics |
| ACCC | American Council of Christian Churches |
| ACCC | Anglican Catholic Church of Canada |