| RFI | Radar Frequency Interferometer 
| Others |
| RFI | Radio France Internationale
| Others |
| RFI | Radio Frequency Interference
| Others |
| RFI | Rapid Fielding Intiative
| Others |
| RFI | RCRA (Resource Conservation and Recovery Act) Facility Investigation
| Others |
| RFI | Ready For Inspection
| Others |
| RFI | Ready For Issue
| Others |
| RFI | Recessed Front Improved
| Others |
| RFI | Registro Fiat Italiano
| Others |
| RFI | Relative Flourescence Intensity
| Others |
| RFI | Relative Fluorescence Intensity
| Others |
| RFI | Religious Freedom Institute
| Others |
| RFI | Remote Facility Inquiry
| Others |
| RFI | Remote Failure Indicator
| Others |
| RFI | Remote File Inclusion
| Others |
| RFI | Remote File Inquiry
| Others |
| RFI | Repeater Frequency Index
| Others |
| RFI | Repetitive Frag Injury
| Others |
| RFI | Request For Implementation
| Others |
| RFI | Request for Improvement
| Others |
| RFI | Request For Information
| Business |
| RFI | Request For Inspection
| Others |
| RFI | Rescue Force International
| Others |
| RFI | Resource File Index
| Others |
| RFI | Resources For Industry
| Others |
| RFI | Rete Ferroviaria Italiana
| Others |
| RFI | Rifle Factory India
| Others |
| RFI | Rifle Factory Ishapore
| Others |
| RFI | Roling For Ice
| Others |
| RFI | Room For Improvement
| Others |
| RFI | Rotax Fuel Injection
| Others |
| RFI | Router Fault Isolation
| Others |
| RFI | Rowing Federation of India
| Others |
| RFI | Run Flat Indicator
| Others |
| RFI | run for it
| Others |