| Term | Definition |
|---|---|
| NA |
Numerical Aperture
Hits: 437 |
| NAB |
National Association of Broadcasters
Hits: 476 |
| NADG |
North American Digital Group
Hits: 426 |
| NAK |
Negative Acknowledgement
Hits: 461 |
| NAMAS |
NAtional Measurement Accreditation Service
Hits: 440 |
| NAP |
Network Access Points
Hits: 440 |
| NAT4882 |
Industries First IEEE-488.2 Controller Chip
Hits: 535 |
| NAU |
Network Addressable Unit
Hits: 429 |
| NBFM |
Narrow Band Frequency Modulation
Hits: 501 |
| NBS |
National Bureau of Standards
Hits: 503 |
| NC |
Network Congestion / No Connection
Hits: 451 |
| NCC |
National Control Centers Telecommunication System
Hits: 422 |
| NCI |
Network Control Interface
Hits: 445 |
| NCP |
Network Control Program
Hits: 486 |
| NCTA |
North American Cable Television Association
Hits: 392 |
| ND:YAG |
Neodymium Yttrium Aluminum Garnet
Hits: 392 |
| NE |
Network Element
Hits: 429 |
| NEC |
Network Electrical Code
Hits: 526 |
| NEMA |
National Electrical Manufactures Association
Hits: 473 |
| NEP |
Noise Equivalent Power
Hits: 446 |
| NEXT |
Near-End Crosstalk
Hits: 414 |
| NF |
Noise Figure
Hits: 489 |
| NFAS |
Non-Frame Alignment Signal
Hits: 465 |
| NFS |
Network Filing System
Hits: 380 |
| NIC |
Network Information Carrier
Hits: 390 |
| NICAM |
Near Instantaneous Companded Audio Multiplex
Hits: 449 |
| NICQA |
National Inspection Council Quality Assurance
Hits: 525 |
| NID |
Network Interface Device
Hits: 430 |
| NII |
National Information Infrastructure
Hits: 417 |
| NIIR |
Russian Scientific Research Institute of Radio Communications
Hits: 385 |
| NIT |
Network Information Table (multiplex) (part of SI)
Hits: 434 |
| NIU |
Network Interface Unit
Hits: 385 |
| nm |
nanometres
Hits: 431 |
| NML |
Network Management Layer
Hits: 459 |
| NMS |
Network Management System
Hits: 439 |
| NMTI |
Node Management Terminal Interface
Hits: 448 |
| NNI |
Network-Network Interface; Network-Node Interface
Hits: 474 |
| NOAA |
National Oceanographic and Atmospheric Administration
Hits: 461 |
| NOC |
Network Operations Center
Hits: 451 |
| NRE |
Non-Recurring Engineering
Hits: 483 |
| NRZ |
Non Return to Zero
Hits: 415 |
| NRZI |
Non Return to Zero Inverted
Hits: 423 |
| NSF |
Non-Standard Facilities
Hits: 462 |
| NT |
Network Termination
Hits: 489 |
| NTSC |
National Television Standards Committee
Hits: 427 |
| NTU |
Network Termination Unit
Hits: 433 |
| NUI |
Network User Identification
Hits: 418 |
| NVM |
Non-Volatile Memory
Hits: 392 |
| NVOD |
Near Video On Demand
Hits: 441 |
| NVP |
Nominal Velocity of Propagation.
Hits: 458 |
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Communications House , 41a Market Street, Watford, Herts, WD18 0PN.