Glossary

Term	Main definition
NA	Numerical Aperture Hits - 894
NAB	National Association of Broadcasters Hits - 900
NADG	North American Digital Group Hits - 844
NAK	Negative Acknowledgement Hits - 909
NAMAS	NAtional Measurement Accreditation Service Hits - 917
NAP	Network Access Points Hits - 884
NAT4882	Industries First IEEE-488.2 Controller Chip Hits - 942
NAU	Network Addressable Unit Hits - 858
NBFM	Narrow Band Frequency Modulation Hits - 987
NBS	National Bureau of Standards Hits - 950
NC	Network Congestion / No Connection Hits - 913
NCC	National Control Centers Telecommunication System Hits - 854
NCI	Network Control Interface Hits - 872
NCP	Network Control Program Hits - 935
NCTA	North American Cable Television Association Hits - 803
ND:YAG	Neodymium Yttrium Aluminum Garnet Hits - 777
NE	Network Element Hits - 875
NEC	Network Electrical Code Hits - 937
NEMA	National Electrical Manufactures Association Hits - 897
NEP	Noise Equivalent Power Hits - 885
NEXT	Near-End Crosstalk Hits - 837
NF	Noise Figure Hits - 918
NFAS	Non-Frame Alignment Signal Hits - 887
NFS	Network Filing System Hits - 803
NIC	Network Information Carrier Hits - 811
NICAM	Near Instantaneous Companded Audio Multiplex Hits - 832
NICQA	National Inspection Council Quality Assurance Hits - 934
NID	Network Interface Device Hits - 860
NII	National Information Infrastructure Hits - 819
NIIR	Russian Scientific Research Institute of Radio Communications Hits - 793
NIT	Network Information Table (multiplex) (part of SI) Hits - 863
NIU	Network Interface Unit Hits - 789
nm	nanometres Hits - 848
NML	Network Management Layer Hits - 882
NMS	Network Management System Hits - 832
NMTI	Node Management Terminal Interface Hits - 845
NNI	Network-Network Interface; Network-Node Interface Hits - 942
NOAA	National Oceanographic and Atmospheric Administration Hits - 900
NOC	Network Operations Center Hits - 846
NRE	Non-Recurring Engineering Hits - 933
NRZ	Non Return to Zero Hits - 815
NRZI	Non Return to Zero Inverted Hits - 834
NSF	Non-Standard Facilities Hits - 848
NT	Network Termination Hits - 916
NTSC	National Television Standards Committee Hits - 828
NTU	Network Termination Unit Hits - 851
NUI	Network User Identification Hits - 830
NVM	Non-Volatile Memory Hits - 795
NVOD	Near Video On Demand Hits - 867
NVP	Nominal Velocity of Propagation. Hits - 862