RR or rr may refer to:
RR Donnelley is a Fortune 500 integrated communications company that provides marketing and business communications, commercial printing, and related services.
RRS Discovery is a barque-rigged auxiliary steamship built for Antarctic research, and launched in 1901. She was the last traditional wooden three-masted ship to be built in the United Kingdom.
RRS Sir David Attenborough is a research vessel owned by the Natural Environment Research Council, to be operated by the British Antarctic Survey for the purposes of both research and logistic support.
RRDtool (round-robin database tool) aims to handle time series data such as network bandwidth, temperatures or CPU load.
RR Auction is an auction house headquartered in Boston’s North End with a production office based in Amherst, New Hampshire.
Rron Broja (born 9 April 1996) is a Kosovo Albanian professional footballer who plays as a defensive midfielder for Macedonian club Shkupi.