NGB-OC means National Guard Bureau - Office of The Chaplain in Military
Similar to NGB-OC
4WW - The Fourth World War503 RCT - 503rd Regimental Combat Team
517 PRCT - 517th Parachute Regimental Combat Team
596 SSC - 596th Signal Support Company
5CCGP - Fifth Combat Communications Group
5M - Machinery, Manpower, Material, Measurement, and Method
6-DOF - Six Degree Of Freedom
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