NRR

NRR may refer to:

Club[edit]

Newport Reading Room, a gentlemen's club in Newport, Rhode Island

Electronic mail[edit]

No Reply Required in the subject field of an email

Law and regulation[edit]

National Recording Registry in the United States
Non-Repudiation of receipt, a legal acknowledgement of origination/authorship of a document (as per internet RFC4130)
Office of Nuclear Reactor Regulation in the United States

Medicine/science[edit]

Net reproduction rate in human fertility
Nitrogen reduction reaction, the conversion of N₂ to ammonia
Noise reduction ratings in hearing protectors

Music[edit]

National Rock Review, an American website for rock music reviews and interviews

Sports[edit]

Net run rate in cricket

Places[edit]

IATA code of José Aponte de la Torre Airport in Ceiba, Puerto Rico

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