ABREVIERI - LITERA N

NASA - National Aeronautics and Space Administration (U.S.)

NAFTA-  Acordul Nord-American de Liber Schimb

NAO -  North Atlantic Oscillation ( Oscilatia Nord Atlantica)
NATO - North Atlantic Treaty Organization

NCEP – National Centres for Environmental Prediction (Centre Nationale pentru Predicta  Mediului)
NEICON - Consorţiul Naţional Electronic Informaţional

NIST – Institutul National de Standarde si Tehnologie, S.U.A.

NIST - National Institute of Standards and Technology
NOAA  - National Oceanic and Atmospheric Administration (U.S.)
NWP - Numerical Weather Prediction ( Prognoza Numerica a Vremii)