English abbreviations from nn to nnn
- nn (Norwegian Nynorsk language (ISO 639-1 code))
- NN. (Nostris ("To Our" with a plural) or Numeri ("Numbers"))
- NNA (Kenitra Airport)
- NNADR (New Nonprofit Almanac and Desk Reference)
- NNAG (North Atlantic Treaty Organization (NATO) Naval Armaments Group)
- NNAWM (National Native American Wellbriety Month)
- NNB (Noon News Bulletin)
- NNC (Non- Normal Checklist)
- NND (No New Data)
- NNDSS (Nationally Notifiable Disease Surveillance System)
- NNE (North North-East)
- NNELL (National Network for Early Language Learning)
- NNF (New National Framework for teaching)
- NNFF (National NeuroFibromatosis Foundation)
- NNG (Nanning Wuxu International Airport)
- NNI (News Network International)
- NNJ (Nexus Network Journal)
- NNK (Naknek Airport (FAA: 5NK))
- NNL (Nondalton Airport (FAA: 5NN))
- NNM (Naryan-Mar Airport)
- NNMC (National Naval Medical Center)
- NNMCC (Northern New Mexico Community College)
- NNN (Near Northwest Neighborhood, Inc.)