O&M - operation and maintenance
OASD SO-LIC - Office of the Assistant Secretary of Defense for Special Operations and Low-Intensity Conflict
OCONUS - outside the continental United States
ODA - Official Development Assistance
ODA - Overseas Development Administration (British)
OECD - Organization for Economic Cooperation and Development
OECF - Overseas Economic Cooperation Fund
OFDA - Office of Foreign Disaster Assistance/USAID
OHDACA - Overseas Humanitarian Disaster Aid and Civil Assistance
OJCS Office of the Joint Chiefs of Staff
OMB - Office of Management and Budget
OPD - officer professional development
OPLAN - operation plan
OPORD - operation order
OPORD - operation order
OPTEMPO - operating tempo
ORS - Oral Rehydration Salts
OSD - Office of the Secretary of Defense
OTI - Office of Transition Initiative/USAID
