Sports Abbreviations and Acronyms
- OBCAOklahoma Basketball Coaches Association
- OBKOut Back Kayak
- OBLOntario Basketball League
- OBNOhio Balloon Network
- OBOOriginal Beks Only
- OBPOn Base Percentage
- OBPOn-Base Percentage
- OBTOff The Beaten Track
- OCOffensive Crouching
- OCOpen Cup
- OCETOberlin College Equestrian Team
- OCFOld Cardinal Fan
- OCRROrange Coulty Rebel Riders
- OCRROrange County Rookie Rider
- OCSOpposition Caught Stealing
- OCSCOrange Council Ofeski Clubs
- OCSGOpen Canoes Sailing Group
- OCTROrange County Trail Runners
- ODCOutdoor Discovery Craft
- ODIOne Day International
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