| Acronym | Definition |
|---|
| IFNA➣International FidoNet Association |
| IFNA➣International Federation of Nonlinear Analysts (Florida Institute of Technology; Melbourne, FL) |
| IFNA➣International Federation of Nurse Anesthetists |
| IFNA➣Interferon Alpha Gene |
| IFNA➣International Forum of News Agencies |
| IFNA➣Islamic Forum of North America |