English abbreviations from rtty to rub
- RTTY (Radio Teletype)
- RTU (Real Tomale United)
- RTUF (ready-to-use therapeutic food)
- RTV (Room Temperature Vulcanizer)
- RTVE (Radio Televisión Española)
- RTW (Saratov Tsentralny Airport)
- RTWT (Real-Time Windows Target)
- RTX (Real Time Executive)
- RTY (Reading Today)
- RTYC (Royal Tay Yacht Club)
- RTZ (Return To Zork)
- ru (Russian language (ISO 639-1 code))
- RUA (Arua Airport)
- RUB (Russian ruble (ISO 4217 currency code))
- Rub. (Ruber ("Red" Breviary))