RR or rr may refer to:
R.R. Donnelley is an American 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.
RRR is an upcoming Indian Telugu-language historical fiction action film written and directed by S. S.
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.
Remote Radar Head Benbecula or RRH Benbecula, is an air defence radar station operated by the Royal Air Force.