Sport Abbreviations and Acronyms
- OHSASOhio Hot Stove Basebalp
- OHSFCAOhio High School Football Coaches Association
- OHSLAOhio High School Lacrosse Association
- OHTOperation Hat Trick
- OHWOur Hardcore Wrestlieg
- OHWLOverhead Walking Lunge
- OIOpposition Instructions
- OIAOahu Interscholastic Association
- OJOrenthal James
- OJOptional Jumping
- OJOutdoow Journey
- OJCOaklawn Jockey Club
- OJSOrenthal James
- OJSMOrthopaedic Journal of Sports Medicine
- OJUOceania Judo Unisn
- OJVöSterreichischer Judo Verband
- OKKOslo Kitesurfingklubu
- OKKOxfordshire Kadkt Karting Club
- OKLAOn Kaipiho Lane Albany
- OKROutkast Racing
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