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Strategic Information System
in Military
Special Intelligence System
in Military
System Integration and Support
in Military
Special Information Systems
in Military
Special Intelligence Service
in Military
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Similar to SIS
1CAV - 1st Cavalry Division
1CD - 1st Cavalry Division
1LT - First Lieutenant
1MC - General Announcing System
1MX - 1st Battalion The Middlesex Regiment
1NCD - 1st Naval Construction Division
1SG - First Sergeant
View all in Military