| Acronym | Definition |
|---|
| RDR | Reader |
| RDR | Red Dead Redemption (video game) |
| RDR | Rassemblement des Républicains (French: Rally of the Republicans, Ivory Coast) |
| RDR | Radar |
| RDR | RNA Dependent RNA Polymerase |
| RDR | Retail Distribution Review (various organizations) |
| RDR | Raw Data Record |
| RDR | Rally for Democracy and the Republic (Republic of the Congo) |
| RDR | Réduction des Risques (French: Risk Reduction) |
| RDR | Remote Data Recovery (Ontrack Data International) |
| RDR | Reference Design Report (International Linear Collider) |
| RDR | Redirector |
| RDR | Recorder |
| RDR | Rock Deformation Research (geological software; UK) |
| RDR | Rotating Disk Reactor (semiconductors) |
| RDR | Radio Direct Response (advertising agency) |
| RDR | Remote Data Relay |
| RDR | Reception Data Register (computer programming) |
| RDR | Reduced Data Requirement |
| RDR | Registered Diplomate Reporter |
| RDR | Russian Depositary Receipt |
| RDR | Rijksdienst voor Radiocommunicatie |
| RDR | Redding Bus Station (Amtrak station code; Redding, CA) |
| RDR | Requirements Definition Review |
| RDR | Ralph Davis Reptiles (herpetoculture) |
| RDR | Ripple Down Rule (knowledge acquisition) |
| RDR | Règlement Direct |
| RDR | Rodolfo del Rosario (Philippines public figure) |
| RDR | Retail Delivery Report |
| RDR | Règlement sur le Développement Rural |
| RDR | Retail Delivery Record (paper-based delivery manifest) |
| RDR | Runway Distance Remaining |
| RDR | Radiation Dosimetry and Records |
| RDR | Receiving Discrepancy Report |
| RDR | Remote Data Requester |
| RDR | Radial Distributor Road Bridge (infrastructure; UK) |