- NRR
- National Research Register (Academic & Science » Universities)National Research Register (Medical » Laboratory)**** Noise Reduction Rating (Medical » Physiology)* Nuclear Receptor Resource (Medical » Human Genome)* Nobles Rock Railroad (Regional » Railroads)* Normal Rate Of Return (Business » Accounting)* North Reef Rippers (Business » Firms)* Non Re Reading (Community » Educational)* No Recognizeable Response (Medical » Physiology)* New Realm Records, Inc. (Business » Firms)
Abbreviations dictionary. 2012.