English abbreviations from rewk to rfa
- REWK (Read only Wedge RFID Transponder, Kilohertz frequency)
- REX (General Lucio Blanco International Airport)
- REXML (Ruby Electric XML)
- REXREP (Radar Exploitation Report)
- REXX (REstructured eXtended eXecutor)
- REZ (Renewable Energy Zone (United Kingdom))
- RF (Royalty-Free)
- RF/EMPINT (Radio Frequency/electromagnetic Pulse Intelligence)
- RF/SAL (Radio-Frequency Semi-Active Laser)
- RF-84F (Republic FICON reconnaissance fighter)
- RFA (Royal Field Artillery)