| Abbreviation | Definition |
|---|---|
| RCC | Regional Climate Center |
| RCMDV | Remote Controlled Mine Disposal Vehicle |
| RCRA | Resource Conservation and Recovery Act |
| RCSD | Reverse Carlson Surge Device |
| RDBMS | Relational Database Management System |
| RDNA | ribosomal DNA |
| REBUS | Routine for Executing Biological Unit Simulations |
| RED | Revolution Education And Development |
| REFM | Resource Ecology and Fisheries Management |
| RELMAP | regional Lagrangian model of air pollution |
| REST | Restricted Environmental Stimulation Technique |
| RFLP | Restriction Fragment Length Polymorphism |
| RI/FS | Remedial Investigation/ Feasibility Study |
| RIDGE | Ridge InterDisciplinary Global Experiments |
| RIOS | Research Internships in Ocean Sciences |
| RIS | River Information Services |
| RISP | Ross Sea Ice Shelf Project |
| RITS | Radiatively Important Trace Species |
| RIV | River |
| RJE | Remote Job Entry |