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- COS Cost of Sales14
- COS Chief of Staff81
- COS Chief Of Station4
- COS Corps Support71
- COS Corporation Support1
- COs Commanding Officers4
- COs Contracting Officers4
- COS Critical Occupational Specialty43
- COS Critical Occupational Specialties4
- COS Civilian Occupational Specialty3
- COS Critical Operational Specialties1
- COS Combat Operations Staff4
- COS Communications Segment4
- Cos Cosine4
- COS Company Orderly Sergeant4
- COS Cadet Officer School4
- COS Chip on Submount4
- COS Chief of Supply4
- CoS Continuum of Service4
- COS Current Operations Section3