| Acronym | Definition |
|---|
| IIIA➣Institute for Infrastructure and Information Assurance (homeland security; James Madison University; Virginia) |
| IIIA➣International Imaging Industry Association |
| IIIA➣Internet Information Infrastructure Architecture |
| IIIA➣Integrated Intelligence Information Application |
| IIIA➣Idea Image Institute of Architects (est. 1984; South Korea) |