| Acronym | Definition |
|---|
| IRRD➣International Road Research Documentation (database) |
| IRRD➣Integrated Rural and Regional Development (est. 2001; Human Sciences Research Council; South Africa) |
| IRRD➣Institute for Rehabilitation Research and Development (Ottawa, Ontario, Canada) |
| IRRD➣Internet Routing Registry Daemon |
| IRRD➣Issue Release Receipt Document |
| IRRD➣Institute of Railway Research and Development |