| Acronym | Definition |
|---|
| IISA➣Insurance Institute of South Africa (Johannesburg, South Africa) |
| IISA➣International Inline Skating Association (trade organization) |
| IISA➣Institut International des Sciences Administratives |
| IISA➣Icarda International School of Aleppo (Aleppo, Syria) |
| IISA➣International Italian Student Association |
| IISA➣International Italian Student Association (Berkeley, California) |
| IISA➣Ishikawa Information Support Association (Japan) |
| IISA➣Integrated Information System Architecture |
| IISA➣Interservice or Interagency Support Agreement |