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Operational Support Systems
in Military
Office of Strategic Services
in Military
Optical Surveillance System
in Military
Operations Support System
in Military
Operation Support System
in Military
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Similar to OSS
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