| Acronym | Definition |
|---|
| IOSA➣Iata Operational Safety Audit |
| IOSA➣Integrale Organisations und Strukturaufstellungen (German: Integral Organizational and Structural Constellations) |
| IOSA➣Islands' Oil Spill Association (San Juan County, WA) |
| IOSA➣Internet and Open Source in Archaeology |
| IOSA➣International Oil Scouts Association |
| IOSA➣International Organizational Studies Association |
| IOSA➣Input/Output Sub-Assembly |