General Abbreviations
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O
| OBD | Ordnance beach detachment. |
| offg | Officiating. As in officiating officer. |
| offr | Officer. |
| O Gp | Opperational group. |
| OO | Operation order or ordnance officer. |
| op | Operate, operated, operation, operational or operator. |
| OP | Observation post. |
| opps - ops | Operations. |
| Or Bat | Order of Battle. |
| ord | Ordnance. |
| org | Organize, organized or organization. |
| O.Rs | Other ranks. It includes warrant
officers, non-commissioned officers ("NCOs"). |
| O.S. | Overseas. |
| O.T.C. | Officers Training Corps. |
| oz | Ounce(s). (Measurement of weight). |
Abbreviations