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RR may stand for:

rr (digraph)
Reader Rabbit, an edutainment software franchise created in 1986 by The Learning Company
Repurchase agreement rate (or "repo rate"), the sale of securities together with an agreement for the seller to buy back the securities at a later date
Reserve requirement, a central bank regulation that sets the minimum reserves each commercial bank must hold (rather than lend out) of customer deposits and notes
Restricted Radiotelephone Operator Permit (RR), a commercial license issued by the American Federal Communications Commission
Revised Romanization of Korean, the official Korean language romanization system in South Korea proclaimed by Ministry of Culture, Sports and Tourism, replacing the older McCune–Reischauer system
Rio Rancho, New Mexico
Rolls-Royce (disambiguation)
Roman Republic, the period of the ancient Roman civilization where the government operated as a republic
Roraima, a state in Brazil
Rural route
Russian roulette, a potentially lethal game of chance in which one places a single round in a revolver, spins the cylinder, places the muzzle against their head, and pulls the trigger. "Russian" refers to the supposed country of origin, and roulette to the element of risk-taking and the spinning of the revolver's cylinder being reminiscent of spinning a roulette wheel
Russian ruble, the currency of the Russian Federation and the two partially recognized republics of Abkhazia and South Ossetia