| Abbreviation | Definition |
|---|---|
| RCNS | Riverside County News Source |
| RDN | Reporting Diversity Network |
| RDS | Radio Data System |
| REW | Rewind |
| RF | Radio Frequency |
| RFID | Radio Frequency IDentification |
| RGW | Radio Gets Wild |
| RHGN | Russell Howard's Good News |
| RHOSLC | Real Housewives Of Salt Lake City |
| RHP | Red Hen Press |
| RIAA | Recording Industry Association of America |
| RIAS | Rundfunk Im Amerikanischen Sektor |
| RIP | Rotary Indexing Press |
| RISC | Reduced Instruction Set Computer |
| RKM | Rothschild Khazarian Mafia |
| RLCBC | Radio Lake Country Broadcasting Corporation |
| RLI | Radio Link Internet |
| RLM | Rédaction Libre Multimédia |
| RLP | Round Lake Publishing |
| RME | Roll My Eyes |