| Abbreviation | Definition |
|---|---|
| ARK | Advances in Robot Kinematics |
| ARK | Advocacy Respect and Knowledge |
| ARK | Akasaka Roppongi Knot |
| ARK | Akira Reina Kaiba |
| ARK | Akita Rescue Kennels |
| ARK | Altogether Ready For Kinship |
| ARK | Amazing Righteous Kids |
| ARK | Archival Resource Key |
| ARK | At Risk Kids |
| ARK | Automated Relational Knowledgebase |
| ARKANSA | Arkansass |
| ARKED | Arking |
| ARKEOLOG | Arkeologlar |
| ARKEOLOG | Arkeologlarin |
| ARKO | Alle Ramen Kunnen Open |
| ARL | Acceptable Reliability Level |
| ARL | Access Rights List |
| ARL | Action Reflection Learning |
| ARL | Action Relation Listing |
| ARL | Addiction Ruins Lives |