R|
|
| RA | (Working Group) Radio Regulations (ECC) |
| RA | Radiocommunication Assembly (ITU) |
| RA | Radio Astronomy Service (ITU) |
| RADAR | Radio Detecting and Ranging |
| RAG | Radiocommunication Advisory Group (ITU) |
| RARC | Regional Administrative Radio Conference (ITU) |
| RAS | Radio Astronomy Service |
| RAS | Royal Astronomical Society (GB) |
| RB | Radiocommunication Bureau (ITU) |
| RD | Radiodetermination Service |
| RDS | Radiodetermination Service |
| RDSS | Radio Determination Satellite Service |
| REC | Recommendation |
| REGTP | Regulatory Authority for Telecommunications and Post (D)
|
| RFI | Radio Frequency Interference |
| RFID | Radio Frequency Identification |
| RHC | Right Hand Circular |
| RIN | Royal Institute of Navigation (GB) |
| RIS | Radiocommunication Information Systems Department (ITU) |
| RL | Radiolocation Service |
| R-LAN | Radio Local Area Network |
| RLS | Radiolocation Service |
| RN | Radionavigation Service |
| RNS | Radionavigation Service |
| RNSS | Radionavigation-Satellite Service |
| RR | ITU-R Radio Regulations (ITU) |
| RRB | Radio Regulations Board (ITU) |
| RRC | Regional Radiocommunication Conference (ITU) |
| RSBN | Radiolocation System for Short Range Navigation (Abbreviation stands for the Russian term) |
| RSC | Radio Spectrum Committee (EC) |
| RSPG | Radio Spectrum Policy Group (EC) |
| RTAGS | Radio Tags |
| RTCA | Radio Technical Commission for Aeronautics (USA) |
| RTT | Road Transport Telematics |
| RTTE | Radio and Telecommunications Terminal Equipment (Directive) |
| RTTT | Road Transport & Traffic Telematics |
