NR
- nr – (s) Southern Ndebele language (ISO 639-1 code)
- NR – (s) Nauru (ISO 3166 and FIPS 10-4 country code digram)
- NRA – (i) National Rifle Association
- NRAO – (i) National Radio Astronomy Observatory
- NRC – (i) National Research Council (U.S.) – Nuclear Regulatory Commission (U.S.)
- NRDC – (i) (U.S.) Natural Resources Defense Council
- NREL – (i) U.S. National Renewable Energy Laboratory
- NRK – (p) Norsk Rikskringkasting (Norwegian Broadcasting Corporation)
- NRMP – (i) National Resident Matching Program (U.S. medicine)
- NRO – (i) U.S. National Reconnaissance Office
- NRT – (i) Near Real Time
- NRTA – (i) National Rat Terrier Association – National Retail Tenants Association – National Retired Teachers Association – Northwest Regional Transmission Association
- NRU – (s) Nauru (ISO 3166 trigram)
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