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Open Systems Interconnection
in Military
Office Of Strategic Intelligence
in Military
Operational Subsystem Interface
in Military
110430110431110432
Similar to OSI
1BCT - First Brigade Combat Team
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
View all in Military