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Operational Readiness
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Operational Rations
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Operations Research
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Other RankS NATO
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Operational Requirement
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Official Regulation
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Similar to OR
1LT - First Lieutenant
1MC - General Announcing System
1MX - 1st Battalion The Middlesex Regiment
1NCD - 1st Naval Construction Division
1SG - First Sergeant
1st - IOC 1st Information Operations Command
Land
1WVI - 1st West Virginia Infantry Regiment
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