Produttori
- Racal
- Racal Dana
- Radio City Products Company
- Radio MFG. Engineers
- Radio Shack Division
- Radiomarine Corporation of America
- Radiometer
- Radiosystem
- Radix Electronic Vertriebs GmbH
- Ramsey Electronics
- RCA
- RCP Radio City Products Inc.
- Realistic
- Redifon
- ResMed
- Respironics
- Revox
- RFT VEB Funkwerk Erfurt
- Rheem Manufacturing Co.
- Ricoh
- RIGOL Technologies Inc.
- Riser-Bond Instruments
- Roadstar
- Robotron
- Rockland
- Rockwell-Collins
- Rohde & Schwarz
- Roland
- Rollei
- Rotel
- RP Electronics
- Rycom Instruments
