O
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| NATO Phonetic Alphabet |
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Acronyms and Abbreviations "O"
- O CLUB
- Officers' Club
- OAC
- Officer Advanced Course
- OBC
- Officer Basic
- OBE
- Overcome By Events
- OCAR
- Office of the Chief, Army Reserve
- OCONUS
- Outside Continental United States
- OD
- Officer of the Day
- OER
- Officer Evaluation Report
- OIC
- Officer In Charge
- OJT
- On the Job Training
- OPF
- Official Personnel File
- ORE
- Operational Readiness Exercise
- ORT
- Organization Review Team
- OSM
- Officer Strength Management
- OWC
- Officers' Wives Club