NAV  Navigation 
NAVAID  Navigation Aid 
NBCM  Normal Brake Control Manifold 
NBF  Network BITE Function 
NBPT  No Break Power Transfer 
NBS  National Bureau of Standards 
NBSELV  Normal Brake Selector Valve 
NC  Normally Closed 
NCC  Nacelle Compartment Cooling 
NCD  No Computed Data 
NCH  Noise Compensated Headset 
NCR  NSS Communication Router 
NCU  Navigation Computer Unit 
NCU  NSS Control Unit 
NCV  Nacelle Cooling Valve 
ND  Navigation Display 
NDB  Navigation Data Base 
NDB  Non-Directional Radio Beacon 
NDB  Non-Directional Beacon 
NDM  Noise Definition Manual 
NDT  Non-Destructive Test 
NEG  Negative 
NFC  Not Fully Closed 
NFO  Not Fully Open 
NFOV  Narrow Field of View 
NHA  Next Higher Assembly 
NLA  Non-Listed Assembly 
NLCP  Noise Level Calculation Program 
NLG  Nose Landing Gear 
NM  Nautical Mile 
Nm  Moment (Newtonmeter) 
NMI  Non Maskable Interrupt 
NO  Normal Operation 
NO  Normal Operation in SSM 
NO  Normally Open 
No  Number 
NonflaG  Non-Flammable Compressor Gas 
NOPT  No Procedure Turn Required 
NORM  Normal 
NORM ALIGN  Normal Alignment 
NOTAM  Notice to Airmen 
NOVOLRAM  Non-Volatile Random Access Memory 
NOVOLRAM  Non-volatile Random Access Memory 
NP  Non Procurable 
NPN  Negative-Positive-Negative 
NPT  National Taper Pipe (Thread) 
NPV  Net Present Value 
NRC  Non-Recurring Cost 
NRP  Navigation Reference Point 
NRZ  Non Return To Zero 
NS  No Smoking 
NSA  Norme Sud Aviation 
NSCM  NATO Supply Code for Manufacturers 
NSDW  Non Specific Design Work 
NSIU  Nose Static Interface Unit 
NSS  Network Server System 

NSU  Network Server Unit 
NTM  Nondestructive Testing Manual 
NTO  No Technical Objection 
NTSC  National Television System Committee 
NTWK  Network 
NUA  Normal Unlock Actuator 
NUM  Numerical 
NVM  Non-Volatile Memory 
NVM  Non Volatile Memory