Secret Intelligence Service (SIS) / Military Intelligence, Section 6 (MI6)

Секретна розвідувальна служба / Військова розвідка, Секція 6 (служба зовнішньої розвідки Великої Британії)

Military Intelligence, Section 6 (MI6)

Australian Secret Intelligence Service (ASIS)

Security Service / Military Intelligence, Section 5 (MI5)

secret service

secret defense service

secret agent intelligence

be drawn from secret intelligence

Military Intelligence, Section 5 (MI5)

branch (military/service branch, armed service)

MIVD (Militaire Inlichtingen- en Veiligheidsdienst / Dutch Military Intelligence and Security Service)

secret (security classification)

secret

secret internet protocol router network (SIPRNET)

top secret (security classification)

top secret

state secret

be marked top secret

foreign secret agent

give away the secret by careless talk

clear secret

clearance for top secret work

secret clearance

secret language

secret post

secret qualification clearance

secret security clearance

secret text

secret weapon

microdot secret writing

echoing cross-section; echoing cross section

section of control surface section

radar cross-section / radar cross section (RCS); radar signature; radar crossover