| Abbreviation | Definition |
|---|---|
| RDR | Regulation - Disregulation - Regulation |
| RDR | Rural Delivery Route |
| RDT | Real Donald Trump (: |
| RDT | Reliability Demonstration Test |
| RDW | Real Dogs Work |
| RE | Re-Election |
| RE | Resident Evil |
| REA | Reading Excellence Act |
| REA | Rural Electrification Administration |
| REACH | Record Export For Art And Cultural Heritage |
| REACH | Respecting Ethnic And Cultural Heritage |
| REAL | Rural Energy Advice Link |
| REB | Rebellion |
| REB | Rural Electrification Board |
| REC | Regional Extension Center |
| REC(s) | Regional Extension Center(s) |
| RECD | Rural Economic Community Development |
| REDI | Rural Economic Development Initiative |
| REE | Research, Education, and Economics (USDA) |
| REF | Research Excellence Framework |