| Abbreviation | Definition |
|---|---|
| ARIS | American Religious Identification Survey |
| ARJO | Alt Religion Judaism Orthodox |
| ARK | Act of Random Kindness |
| ARK | Acts of Random Kindness |
| ARM | Alabama Rural Ministry |
| ARM | Association of Radical Midwives |
| ARMM | Autonomous Region in Muslim Mindanao |
| ARPC | Adam Road Presbyterian Centre |
| ARSP | American Religious Sounds Project |
| ARSR | Annual Review of the Sociology of Religion |
| ART | Apply, Resolve, Thrive |
| ARTB | Ancient Roots Translinear Bible |
| ARZ | Association for Revival of Zoroastrianism |
| ARZA | American Reform Zionists Association |
| AS | Alaihi Salaam |
| ASA | All Saints Association |
| ASAP | A Solution A Promise |
| ASAP | All Souls Are Precious |
| ASAP | Always Say A Prayer |
| ASAP | Always Singing, Always Praying |