OPUS means OSS/PODPS
Observation Support System/Post-Observation Data Processing System Unified System in
Military
Similar to OPUS
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