| Abbreviation | Definition |
|---|---|
| 1LR | Residential Line |
| AARO | Association of Americans Resident Overseas |
| ACRC | Arapahoe County Residential Center |
| ADRO | Abu Dhabi Residents Office |
| AIRPM | Associate of the Institute of Residential Property Management |
| AIRS | AIDS Interfaith Residential Services |
| ALRC | Assisted Living and Residential Care |
| ALRPS | Assisted Living Resident Profile Survey |
| AMRP | Alarm Management Resident Process |
| APRC | Alien Permanent Resident Certificate |
| APRIL | Association of Programs for Rural Independent Living |
| APRJC | Andhra Pradesh Residential Junior Colleges |
| APRS | Andhra Pradesh Residential School |
| APTNO | apartment number |
| APTWR | Andhra Pradesh Tribal Welfare Residential |
| AR | Arkansas Resident |
| ARA | Assistant Resident Advisor |
| ARCF | Adult Residential Care Facility |
| ARCH | Area Residents Caring and Helping |
| ARCP | Adult Residential Care Provider |