NASA - neig
- NASA
- NASDA
- NAT
- national (map) projection
- National Aeronautics and Space Administration
- National Geodetic Survey
- National Geodetic Vertical Datum
- National Geospatial Data Framework
- National Geospatial Programs Office
- National Geospatial-Intelligence Agency
- National Imagery and Mapping Agency
- National Information Standards Organization
- National Institute of Standards and Technology
- National Map Accuracy Standards
- National Oceanic and Atmospheric Administration
- National Space Development Agency of Japan
