6
NAED
normalized angle error detector
7
NALM
nonlinear amplifying loop mirror
8
NAPM
National Association of Photographic Manufacturers
9
NAS
National Academy of Science
10
NASA
National Aeronautics and Space Administration
11
NASDA
National Space Development Agency (Japan)
15
NCGA
National Computer Graphics Association
16
NCID
National Council for Industrial Defense
17
NCIPT
National Center for Integrated Photonics Technology
18
NCPM
noncritical phase matching
19
NCTA
National Cable Television Association
20
NCTR
noncooperative target recognition
22
NDE
nondestructive evaluation
23
NDIR
nondispersive infrared
24
NDRO
nondestructive readout
25
NDT
nondestructive testing
26
NEA
negative-electron affinity; noise equivalent angle
27
NEB
noise equivalent bandwidth
28
NEC
national electric code
29
NEDT
noise equivalent delta temperature
30
NEE
noise equivalent energy; noise equivalent exposure
31
NEI
noise equivalent irradiance
32
NEMA
National Electrical Manufacturers' Association
33
NEMS
nanoelectromechanical systems
34
NEP
noise equivalent power
35
NET
noise equivalent temperature
36
NEWS
north, east, west, south
37
NEXT
near-end crosstalk
39
NHZ
nominal hazard zone