Rf or RF may stand for:
- Radio frequency, a term in broadcasting.
- Right fielder, a defensive position in baseball.
- Rutherfordium, the chemical element.
- Rheumatoid factor, a blood test used to diagnose rheumatoid arthritis.
- RF, a Mazda piston engine.
- Russian Federation, Russia, formerly part of the USSR.
This disambiguation page lists articles associated with the title RF.
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