| Acronym | Definition |
|---|
| NIAA➣National Institute of Animal Agriculture |
| NIAA➣National Institute of Accountants, Australia |
| NIAA➣National Indian Athletic Association |
| NIAA➣Northern Ireland Association of Aeromodellers |
| NIAA➣Nevada Interscholastic Athletics Association |
| NIAA➣National Industrial Advertisers Association |
| NIAA➣Northern Independent Athletic Association (Columbus, OH) |