| Abbreviation | Definition |
|---|---|
| RFC | Request For Comments |
| RFCPCS | Retail Food and Cooperative Programs Coordination Staff |
| RFCPCS(CFAN) | Retail Food and Cooperative Programs Coordination Staff (CFSAN) |
| RFD | Request For Designation |
| RFDD | Regional Food and Drug Director |
| RFI | Request For Information |
| RFID | Radio Frequency IDentification |
| RFP | Request For Proposal |
| RFPT | Retail Food Protection Team |
| RFPT(CFSAN) | Retail Food Protection Team (CFSAN) |
| RFR | Reportable Food Registry |
| RH | Relative Humidity |
| RH | responsible head |
| RIA | Radio-ImmunoAssay |
| RIAS | Regulatory Impact Analysis Statement |
| RIBA? | recombinant immunoblot assay (Chiron ?) |
| RIBAÖ | recombinant immunoblot assay (Chiron «) |
| RIBA™ | recombinant immunoblot assay (Chiron ®) |
| RIBAﾙ | recombinant immunoblot assay (Chiron ) |
| RIC | Resident In Charge |