| Abbreviation | Definition |
|---|---|
| REVS | Register of Encumbered Vehicle Search |
| REVS | Researching the Evolution of Vehicles in Society |
| REW | Rewound |
| RFCS | Rear Facing Child Seat |
| RFCS | Regenerative Fuel Cell System |
| RFD | Redundant Fuel Device |
| RFF | Racor Filter Funnel |
| RFG | Re- Formulated Gasoline |
| RFI | Rescue Force International |
| RFI | Rotax Fuel Injection |
| RFID2VIN | Radio Frequency IDentification chips for Automobile Vehicle IDentification Numbers |
| RFO | Rudder Flutter Online |
| RFR | Road Film Remover |
| RFS | Renewable Fuel Standard |
| RFS | Ringed Four Stroke |
| RFS | Road Feeder Service |
| RFTA | Regional Fuel Tax Agreement |
| RFTA | Roaring Fork Transportation Authority |
| RFW | Remote Free Wheel |
| RFY | Railroad Freight Yard |