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NADSI NATO Interface bus based on Fiber Channel.

Nexus 5001 IEEE ISTO embedded processor debug interface standard.

NMEA 2000 is a CANbus link interface for marine vessels.

NTDS: {MIL-STD-1397, Input / Output Interfaces, Standard Digital Data, Navy Systems. Type A {NTDS Slow} transfers data at 41667 words/sec between 0v [logical 1] and -15v [logical 0]. Type B {NTDS Fast} transfers data at 250000 words/sec between 0v and -3v. Type C {ANEW} transfers data at 250000 words/sec between 0v and +3.5v. Type D {NTDS Serial} Asynchronous serial data transfer at 10Mbps using bipolar +/- 3.25v. Type E {NATO Serial} Asynchronous serial data transfer at 10Mbps using bipolar +/- 600mv, with 300000 words/sec in burst mode, or 175000 words/sec in single transfer mode. Type F {Aircraft internal time division multiplex bus} uses MIL-STD 1553. Type G {RS-449 compatible with RS-232} uses EIA449/EIA232 implementation. Type H {High throughput parallel} uses parallel data transfers at 500000 words/sec at 0v and +3.5v. Type J {Fiber optic NATO serial} uses a fiber optic Implementation of type E. Type K {Small Computer System Interface SCSI} based on the SCSI-II standard}

NUbus {IEEE Std 1196-1987 Simple 32-Bit Backplane Bus; NuBus Apple [Macintosh and NeXT Computer] expansion bus with 32 bit address and 32 bit data bus operating at 10MHz, with a throughput of 40MBps. The card form factor is 12" x 7", and used a standard 96-pin three-row VME connector. The PCI bus replaced NUbus, which is OBSOLETE.}