Acronyms: N

Acronym	Name
NPDU	Network protocol data unit
NPE	Non-primary Airport Entitlement
NPIAS	National Plan of Integrated Airport Systems
NPIAS	National plan for integrated airport systems
NPM	NAS Program Manager/Management
NPR	National performance review
NPRM	Notice of Proposed Rulemaking
NPRM	Notice of proposed rule making
NPV	Net present value
NR	Network router
NR	Non-Rulemaking; refers to a type of airport airspace analysis case
NRA	Non-Rulemaking Airport; refers to a type of airport airspace analysis case
NRA	Non-radar airspace
NRC	Non-- Recurring Charge
NRC	Non-Recurring Charge
NRCS	National Radio Communications Systems
NRD	Network routing domain
NRP	National route program
NRS	Navigation Reference System
NRS	Navigation reference system
NRT	Near-Real Time
NRZ	Non-return to zero
NS	Network service
NSA	National Security Agency (U.S.)
NSA	National Security Area
NSAP	National Service Assurance Plan
NSAP	Network service access point
NSC	National Service Center
NSC	Network service center
NSD	Navigation System Database
NSDU	Network service data unit
NSEL	NSAP selection
NSEU	Neutron single event upset
NSP	National Simulator Program
NSRCATN	National Strategy to Reduce Congestion on America's Transportation Network
NSSFC	National Severe Storms Forecast Center
NSSL	National Severe Storms Laboratory (U.S.)
NSSL	National Severe Storms Laboratory; Norman, OK
NSW	No Significant Weather
NSWRH	NWS Regional Headquarters
NTAP	Notices To Airmen Publication
NTDA	NEXRAD Turbulence Detection Algorithm
NTF	No trouble found
NTIA	National Telecommunications and Information Administration (U.S.)
NTP	National Transportation Policy
NTP	Notice to Proceed
NTS	NOTAM Tracking System
NTSB	National Transportation Safety Board
NTSB	National Transportation Safety Board (U.S.)
NTST	National Television Systems Committee
NTZ	No Transgression Zone
NUC	Navigation uncertainty category
NUCp	Navigation uncertainty category for position
NUI	Network user identification
NUP	NEAN update program
NVCD	Night vision cueing and display
NVIS	Night vision imaging system
NVM	Non-volatile memory
NVRAM	Non-volatile RAM
NVS	National Airspace System Voice Switch (FAA)
NWP	National Work Plan
NWP	NextGen Weather Processor
NWS	National Weather Service
NWS	National Weather Service (U.S.)
NWSR	NWS Weather Excluding NXRD
NWxP	NextGen Weather Processor (FAA)
NXRD	Advanced Weather Radar System
NextGen	Next Generation Air Transportation System
NextGen	Next Generation Air Transportation System (U.S.)
NoPT	No Procedure Turn Required

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Acronyms: N