Rb

RB or Rb may stand for:

• the chemical element Rubidium
• The Nissan RB engine
• the IATA code for Syrian Arab Airlines
• the Retinoblastoma protein, found mutated in many cancers, including retinoblastoma cancer
• an abbreviation for retinoblastoma, a cancer of the eye
• RB, the name used for a series of buses manufactured by Hyundai Motor Company
• an abbreviation for right back, a defensive position in football (soccer)
• an abbreviation for running back, an offensive position in football (American)
• Radio Bremen, a German broadcasting station in Bremen
• re-entry body (US Navy term for re-entry vehicle, rv)
• Rehoboth Beach, Delaware
• Road bike
• The Ruby programming language's typical filename extension, .rb
• .rb is also the extension associated with Rocket Ebook files.
• Rolls-Barnoldswick, one of the design and production sites for Rolls-Royce jet engines
• Rafael Benitez Liverpool manager
• Rancho Bernardo, a community in northern San Diego