| Abbreviation | Definition |
|---|---|
| INA | International Nanny Association |
| INA | Iowa Newspaper Association |
| INAPR | Indonesian Association for Pattern Recognition |
| InASEA | International Association for Southeast European Anthropology |
| INBA | Illinois News Broadcasters Association |
| INBA | Indian National Bar Association |
| INBA | Indian Naval Benevolent Association |
| INBA | International Natural Bodybuilding Association |
| INBA | International Nubian Breeders Association |
| INCA | Independent Networks Cooperative Association |
| INCA | Industry Nature Conservation Association |
| INCCA | Indonesia Congress and Convention Association |
| INDA | Inland Northwest Dressage Association |
| INFRA | Independent Natural Food Retailers Association |
| INGAA | Interstate Natural Gas Association of America |
| INHAA | Illinois Nursing Home Administrators' Association (Lanark, IL) |
| INIA | International Narcotics Interdiction Association |
| INOA | International Norton Owners Association |
| INPA | Indian National Portage Association |
| INPA | Indiana News Photographers Association |