| Abbreviation | Definition |
|---|---|
| RAUN | Regional Academy on the United Nations |
| RB | Republic of Biafra |
| RBMpartnership | Roll Back Malaria partnership |
| RC | Resident Coordinator |
| RCAF | Royal Canadian Air Force |
| RCO | Reports Clearance Officer |
| RCO | Resident Coordinator’s Office |
| RCO | Resident Coordinators Office |
| RD | Regional Director |
| RDP | Reconstruction And Development Programme |
| RDT | Rapid Diagnostic Tests |
| READ | Regional Economies Assessment Database |
| REBIA | Regional Educational Building Institute for Africa |
| RECOM | Research and Communication on Foreign Aid |
| REMPEC | Regional Marine Pollution Emergency Response Centre for the Mediterranean Sea |
| RHL | Reproductive Health Library |
| RIC | Recently Industrialized Country |
| RIM | Refugees, Immigrants, and Minorities |
| RMG | Random Mission Generator |
| RMPU | Regional and Metropolitan Planning Unit |