English abbreviations from nnn to no2
- NNN (Near Northwest Neighborhood, Inc.)
- nno (Norwegian Nynorsk language (ISO 639-2 code))
- NNP (Nkrumah National Party)
- NNPDF (National Niemann- Pick Disease Foundation)
- NNPN (Neighbor to Nation/ PledgeNet)
- NNPTC (Naval Nuclear Power Training Command)
- NNR (Connemara Regional Airport)
- NNS (Northern North Sea)
- NNSA (U.S. National Nuclear Security Administration)
- NNSL (National Ski League)
- NNSY (Norfolk Naval Shipyard)
- NNT (Nearest Neighbor Tool)
- NNTP (Network News Transfer Protocol)
- NNU (Network Northeastern University)
- NNW (North North-West)
- NNWC (Naval Network Warfare Command)
- NNX (Nunukan Airport)
- NNY (Nanyang Airport)
- no (Norwegian language (ISO 639-1 code))
- No. (Nobis ("to us", "for us"))
- N.O (Not out)
- NO2 (Nitrogen Oxide)