Rf or RF is an abbreviation for:

• Radiative forcing, (RF) is an IPCC unit that nominates the global, annual average of radiative imbalance (W m-2) in net heating of the Earth's lower atmosphere as a result of human activities since the beginning of the industrial era.
• Roger Federer, 13 time Grand Slam winning and 1 time Olympic doubles champion tennis player
• Radio frequency
• Randall Flagg
• Range Factor, a baseball statistic
• "rate of flow", as in Volumetric flow rate
• Receptive field, in neuroscience, referring to the kinds of stimuli to which a neuron is sensitive
• Red Faction, a first-person shooter game that was released in 2001 by THQ and Volition
• Register file, an array of processor registers in a CPU
• République Française
• Recombinant Frequency, used in genetics to measure genetic linkage
• Retardation factor (or retention factor), designated as R_f, used in chromatography
• Reticular formation
• Rheumatoid factor, a blood test used to diagnose rheumatoid arthritis
• Rhodesian Front, governing party of Rhodesia under the UDI
• Ric Flair
• Right fielder, a defensive position in baseball
• Rinforzando, a directive in sheet music
• Roman foot, ancient Roman unit of measurement
• Royalty-free
• Rumble Fighter, a multiplayer online fighting game published by OGPPlanet
• Russian Federation, Russia, formerly part of the USSR
• Rutherfordium, the symbol for the chemical element

Rf or RF may also refer to:

• Mazda F engine, a Mazda piston engine
• .??, the proposed Cyrillic alphabet-only top-level domain of the Russian Federation
• Radio Nippon, a Japanese radio station in the vicinity of Tokyo - JORF
• RF, the IATA code for Florida West International Airways
• RF, the NYSE ticker symbol for Regions Financial Corporation
• RF connectors, electrical connectors designed to work at radio frequencies
• RF Online, an online RPG made by CCR

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