O
OCONUS
Outside Continental United States; (e.g., Hawaii, Alaska, Japan).
O
OCS
Officer Candidate School; a commissioning program.
O
OER
Officer Evaluation Report; Army officer performance record.
O
Offer
A response to a solicitation that, if accepted, would bind the offeror to perform the resulting contract.
O
OJT
On the Job Training; learning while performing duties.
O
O&M
Operations and Maintenance; the budget for the day-to-day running of military units and facilities.
O
OMB
Office of Management and Budget; the agency that assists the President in managing the federal budget.
O
OPFOR
Opposing Force; soldiers playing the enemy in training.
O
OPLAN
Operations Plan; a complete plan for joint operations.
O
OPNAV
Chief of Naval Operations Staff; the headquarters staff for the US Navy.
O
OPSEC
Operational Security; protecting info about military operations.
O
OTS
Officer Training School; Air Force commissioning program.
O
Overhead
Indirect costs that are necessary for the production of a product or service but not directly traceable to it.