Glossary

Term	Main definition
NA	Numerical Aperture Hits - 867
NAB	National Association of Broadcasters Hits - 874
NADG	North American Digital Group Hits - 814
NAK	Negative Acknowledgement Hits - 885
NAMAS	NAtional Measurement Accreditation Service Hits - 888
NAP	Network Access Points Hits - 861
NAT4882	Industries First IEEE-488.2 Controller Chip Hits - 918
NAU	Network Addressable Unit Hits - 834
NBFM	Narrow Band Frequency Modulation Hits - 959
NBS	National Bureau of Standards Hits - 927
NC	Network Congestion / No Connection Hits - 888
NCC	National Control Centers Telecommunication System Hits - 827
NCI	Network Control Interface Hits - 849
NCP	Network Control Program Hits - 912
NCTA	North American Cable Television Association Hits - 778
ND:YAG	Neodymium Yttrium Aluminum Garnet Hits - 755
NE	Network Element Hits - 852
NEC	Network Electrical Code Hits - 917
NEMA	National Electrical Manufactures Association Hits - 874
NEP	Noise Equivalent Power Hits - 866
NEXT	Near-End Crosstalk Hits - 814
NF	Noise Figure Hits - 895
NFAS	Non-Frame Alignment Signal Hits - 859
NFS	Network Filing System Hits - 779
NIC	Network Information Carrier Hits - 784
NICAM	Near Instantaneous Companded Audio Multiplex Hits - 807
NICQA	National Inspection Council Quality Assurance Hits - 911
NID	Network Interface Device Hits - 838
NII	National Information Infrastructure Hits - 795
NIIR	Russian Scientific Research Institute of Radio Communications Hits - 771
NIT	Network Information Table (multiplex) (part of SI) Hits - 840
NIU	Network Interface Unit Hits - 766
nm	nanometres Hits - 827
NML	Network Management Layer Hits - 863
NMS	Network Management System Hits - 810
NMTI	Node Management Terminal Interface Hits - 822
NNI	Network-Network Interface; Network-Node Interface Hits - 920
NOAA	National Oceanographic and Atmospheric Administration Hits - 878
NOC	Network Operations Center Hits - 824
NRE	Non-Recurring Engineering Hits - 909
NRZ	Non Return to Zero Hits - 791
NRZI	Non Return to Zero Inverted Hits - 813
NSF	Non-Standard Facilities Hits - 826
NT	Network Termination Hits - 894
NTSC	National Television Standards Committee Hits - 803
NTU	Network Termination Unit Hits - 829
NUI	Network User Identification Hits - 807
NVM	Non-Volatile Memory Hits - 774
NVOD	Near Video On Demand Hits - 840
NVP	Nominal Velocity of Propagation. Hits - 841