| Abbreviation | Definition |
|---|---|
| ARDL | Augmented Reality Development Lab |
| ARDP | Abujhmarh Rural Development Project |
| ARDP | Active Residential Development Preference |
| ARDP | Advanced Referee Development Program |
| ARDP | Air Reserve Development Plan |
| ARDP | Air Reserve Development Project |
| ARDU | Aircraft Research and Development Unit |
| ARDY | Association for Rural Development of Yilong |
| ARED | Arab Real Estate Development |
| AREED | African Rural Energy Enterprise Development |
| AREED | African Rural Energy Entreprise Development |
| ARM | Advocacy for resource mobilization |
| ARND | Alcohol Related Neurodevelopmental Disorder |
| ARRD | Alumni Relations and Resource Development |
| ARRD | Australian Railways Research and Development |
| ARTD | Association for Regional Tribal Development |
| ASADI | African Science Academy Development Initiative |
| ASCD | Association of Supervision and Curriculum Development |
| ASCEND | Advocates Striving To Create Edgewood Neighborhood Development |
| ASCEND | Asian Social Culture Empowerment Networking Development |