certificate service center security
National Computer Security Center
NCSC National Computer Security Center
non-security operation zone
NSC Network Security Center
security operation analysis
security operation zone
network security center
Army technical operation center
communication operation center
flight operation center
genetic operation operation function
INTELSAT Operation Center
国际电信卫星组织操作中心国际电信卫星操作中心
国际电信卫星操作中心
JOC Joint Operation Center
logistics operation center
Network Operation Center