| ARA | Attitude Reference Assembly | In English | → Spaceflight engineering, astronautics |
| ARA | Auxiliary Recovery Antenna | In English | |
| ARA | Altstoff Recycling Austria | In German | |
| ArA | Arkiv för Astronomi | In Swedish | → Serial publications, periodicals → Astronomy |
| ARA | Asociaţia Română a Apei | In Romanian | → Associations → Hydrology → 626 |
| ARA | Amore Riparazione e Apostolato | In Italian | → Christianity |
|