NAS: National Airspace System
NASAC: NASA Conference Publication
NASAL: NASA Circular Letter
NASAR: NASA Reference Publication
NASAS: NASA Special Publication
NASCOM: NASA Communications
NASDA: National Space Development Agency
NASM: National Air and Space Museum
NASO: North American Space Operations
NASP: National AeroSpace Plane
NASP: National Aero-Space Plane
NASTRAN: NASA Structural Analysis Program
NAVSAT: Navigation Satellite
NAVT: NASA Altimeter Verification Telemetry
NCC: NASA Class Code
NCC: NASA Communications Control
NCOS: National Commission on Space
ND: NASA document
NDGPS: Nationwide Differential Global Positioning System
NEEDS: NASA End-to-End Data System
NEMS: NASA Equipment Management System
NERVA: Nuclear Engine for Rocket Vehicle Application
NESDIS: National Environmental Satellite Data and Information Service
NESP: Naval Extremely high frequency Satellite Program
NESS: National Environmental Satellite Service
NET: NASA Employee Team
NEVS: NASA Equipment Visibility System
NFS: NASA FAR Supplement
NGA: National Geospatial-Intelligence Agency
NGT: NASA Ground Terminal
NHB: NASA Handbook
NMI: NASA Management Instruction
NOES: National Operational Environmental Satellite
NORAD: North American Aerospace Defense Command
NOSS: National Oceanic Satellite System
NPC: NASA Procurement Circular
NPC: NASA Publication Control
NPD: NASA Policy Directive
NPN: NASA Part Number
NPS: NASA Planning Studies