Acronym of SIS


( Secret Intelligence Service ) Organization, information and external security. briefly SMS iPhone SMS (SIS), one of the British intelligence organization, the main United Kingdom to receive and analyze information and covert operations in foreign countries. The organization in written English more called " service" (or casual false " service") to be known. In some resources it MI6 also say that the shorter the name, the more it Military Intelligence 6.
SIS

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