| AfO | Archiv für Orientforschung | In German | → Language, linguistics, literature |
| AFO | Abort From Orbit | In English | → Spaceflight engineering, astronautics |
| AFO | Announced Flight Opportunity | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| AFO | Ateliers Français de l'Ouest | In French |