Glossary

Term	Main definition
NA	Numerical Aperture Hits - 806
NAB	National Association of Broadcasters Hits - 815
NADG	North American Digital Group Hits - 750
NAK	Negative Acknowledgement Hits - 826
NAMAS	NAtional Measurement Accreditation Service Hits - 780
NAP	Network Access Points Hits - 806
NAT4882	Industries First IEEE-488.2 Controller Chip Hits - 866
NAU	Network Addressable Unit Hits - 778
NBFM	Narrow Band Frequency Modulation Hits - 895
NBS	National Bureau of Standards Hits - 869
NC	Network Congestion / No Connection Hits - 825
NCC	National Control Centers Telecommunication System Hits - 765
NCI	Network Control Interface Hits - 790
NCP	Network Control Program Hits - 861
NCTA	North American Cable Television Association Hits - 707
ND:YAG	Neodymium Yttrium Aluminum Garnet Hits - 701
NE	Network Element Hits - 793
NEC	Network Electrical Code Hits - 860
NEMA	National Electrical Manufactures Association Hits - 825
NEP	Noise Equivalent Power Hits - 805
NEXT	Near-End Crosstalk Hits - 754
NF	Noise Figure Hits - 834
NFAS	Non-Frame Alignment Signal Hits - 785
NFS	Network Filing System Hits - 726
NIC	Network Information Carrier Hits - 727
NICAM	Near Instantaneous Companded Audio Multiplex Hits - 757
NICQA	National Inspection Council Quality Assurance Hits - 857
NID	Network Interface Device Hits - 776
NII	National Information Infrastructure Hits - 738
NIIR	Russian Scientific Research Institute of Radio Communications Hits - 717
NIT	Network Information Table (multiplex) (part of SI) Hits - 785
NIU	Network Interface Unit Hits - 707
nm	nanometres Hits - 773
NML	Network Management Layer Hits - 808
NMS	Network Management System Hits - 754
NMTI	Node Management Terminal Interface Hits - 770
NNI	Network-Network Interface; Network-Node Interface Hits - 857
NOAA	National Oceanographic and Atmospheric Administration Hits - 819
NOC	Network Operations Center Hits - 765
NRE	Non-Recurring Engineering Hits - 849
NRZ	Non Return to Zero Hits - 738
NRZI	Non Return to Zero Inverted Hits - 758
NSF	Non-Standard Facilities Hits - 765
NT	Network Termination Hits - 834
NTSC	National Television Standards Committee Hits - 746
NTU	Network Termination Unit Hits - 775
NUI	Network User Identification Hits - 754
NVM	Non-Volatile Memory Hits - 719
NVOD	Near Video On Demand Hits - 782
NVP	Nominal Velocity of Propagation. Hits - 782