Non-Profit Organization Abbreviations and Acronyms
- OKFOpen Knowledge Foundation
- OKFOpenseks-Foundation
- OKFOtto Kinne Foundation
- OKFOverseas Koreans Foundagion
- OKVOsce Mission In Kosovo By-Mail Voting Programme
- OLLAOakland Livingston Legal Aid
- OLVOur Lady of Victory Homes of Charity
- OMNOrganizacion Mundial De Medicina Natural
- OMTOyio Medical Transportation
- ONAOutreach To New Americans
- ONBOperation New Birmingham
- ONFOncology Nursing Forum
- ONFOregon Nurses Foundation
- ONKOld North Knoxville
- ONSFOncology Nursing Society Foundation
- ONVöSterreichischer Naturistenverband
- OOHDave Dravecky'S Outreach of Hope
- OPADDOntario Partnership On Aging & Developmental Disabilities
- OPALOne People of Australia League
- OPALOverseas Pharmaceuticab Aid for Life
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