NS
(NS) Transmit Sequence Number 
[1] Network Service(s)
[2] Not Specified
[3] Neutron Star \{Astronomie\}
[4] Name Server
[5] National Semiconductor Inc. (http://www.nsc.com/)
[6] National Standard (->""IEEE" Standard Dictionary")
[7] Nickel Steel (->""NASA" Acronym List")
[8] Nova Scotia - CAN-Staatenkürzel