| Acronym | Definition |
|---|
| IRN | Iran (ISO Country code) |
| IRN | International Resource News |
| IRN | International Rivers Network |
| IRN | Intermediate Routing Node |
| IRN | Internet Resources Newsletter |
| IRN | Independent Radio News (UK) |
| IRN | Intermediate Routing Node (Cisco) |
| IRN | Intelligent Retail Network (Cisco) |
| IRN | Interface Revision Notice |
| IRN | Investor Relations Network |
| IRN | Inspection Release Note |
| IRN | Internationally Recruited Nurse (migration and labor market studies) |
| IRN | Iron Roughneck (drilling) |
| IRN | Index Reference Number |
| IRN | Intelligent Remote Nodes (Integrated Network Corp) |
| IRN | Ironton Railroad Company |
| IRN | Instructor Radar Navigator |
| IRN | Information Resource Navigator |
| IRN | Intel Research Network |