| Abbreviation | Definition |
|---|---|
| ACORN | A Classification Of Residential Neighborhoods |
| ACORN | Association Of Community Organizations For Reform Now |
| ACPC | Allsboro Cumberland Presbyterian Church |
| ACPE | Apostolic Council of Prophetic Elders |
| ACPE | Association for Clinical Pastoral Education |
| ACPR | Apostles Creed Prayer Request |
| ACRE | Assessment Of Catholic Religious Education |
| ACRS | Anabaptist Center for Religion and Society |
| ACS | American Church Systems |
| ACSA | Australian Catholic Students Association |
| ACSC | Auburn Christian Student Center |
| ACSD | Association for Christians in Student Development |
| ACSES | Anabaptist Congregations in Secular Educational Settings |
| ACSI | Association of Christian School International |
| ACSI | Association of Christian Schools |
| ACSI | Association of Christian Schools International's |
| ACT | Acknowledge, Care, and Tell |
| ACT | Activating Congregations for Transformation |
| ACT | Australian Contemporary Tap |
| ACT | Awakening Change Together |