| Acronym | Definition |
|---|
| RFU➣Rugby Football Union |
| RFU➣Remote Firmware Update (firmware) |
| RFU➣Relative Fluorescence Units |
| RFU➣Reserved For Future Use |
| RFU➣Russian Football Union |
| RFU➣Radio Frequency Unit |
| RFU➣Ready For Use |
| RFU➣Reach for Unbleached (Canada; est. 1991) |
| RFU➣Radical Fundamentalist Unit (US FBI) |
| RFU➣Remote Fan Unit |
| RFU➣Reconfigurable Functional Unit |
| RFU➣Réserve Facilement Utilisable (French: Readily Available Reserve) |
| RFU➣Request for Update |
| RFU➣Remote Focusing Unit (to focus robotic lighting instruments on stage) |
| RFU➣Reason for Update (electronic document processing) |
| RFU➣Rolling Foul-Up |
| RFU➣Sub-Capacity Dispersion Range (US FBI) |