NACIC
National Counterintelligence Center
NACIC
National Counter Intelligence Center (USA).
NADIS
Nachrichtendienstliches Informationssystem (ÄfV, BRD)
NATO
North Atlantic Treaty Organisation
NC
NATO CONFIDENTIAL
NCA
NATO CONFIDENTIAL ATOMAL
NCIS
Naval Criminal Investigative Service (US-Navy)
NCS
National Cryptologic School (NSA)
ND
Nachrichtendienst
NDC
Non-US Diplomatic Communications
NDV
Nachrichtendienstliche Verbindung
NF REL
Non Foreign Release
NFIB
National Foreign Intelligence Board (USA)
NIA
National Intelligence Authority, 1946-47
NIA
National Intelligence Agency (nigerianischer Auslandsnachrichtendienst)
NIC
Naval Intelligence Command (US-Navy)
NIE
National Intelligence Estimate
NIS
Naval Investigative Service (USA)
NISP
National Industrial Security Program (USA)
NKGB
Peoples Commissariat for State Security, 1943-46
NKVD
Peoples Commissariat for Internal Affairs, 1934-43
NMIC
National Maritime Intelligence Center (US-Navy)
NOC
Nonofficial Cover
NOFORN
Not Releasable to Foreign Nationals
NONCONTRACT
Geheimhaltung gegenüber privaten Vertragsfirmen und deren Mitarbeiter
NORCANUKUS
Weitergabe von Geheimmaterial an Norwegen, Kanada, GB erlaubt (USA)
NR
NATO RESTRICTED
NRO
National Reconnaissance Office (USA)
NS
NATO SECRET
NSA
NATO SECRET ATOMAL
NSA
National Security Agency (USA)
National Security Agency, from 1952
NSC
National Security Council. Nationaler Sicherheitsrat (USA)
National Security Council, from 1947
NSCID
National Security Council Intelligence Directive. (USA).
National Security Council Intelligence Directive
NSG
Naval Security Group (US-Navy)
NSG
Naval Security Group (US-Marine)
NSOC
National Security Operations Center, Kommandozentrale der NSA mit 24 stündiger Einsatzbereitschaft
NSPA
National Security Planing Agency (südkoreanischer (Auslands) Nachrichtendienst.
NUCINT
Nuclear Intelligence