California Abbreviations and Acronyms
- ORHSOtay Ranch High School
- ORIMOffice of Risk and Insurance Management
- OSOakwood School
- OSOxford School
- OSAOakland School for the Arts
- OSAEOffice of State Audits and Evaluations
- OSBAOffice of Small Business Advocate
- OSDOrchard School District
- OSEOffice of The Secretary of Education
- OSHABOccupational Safety & Health Appeals Board
- OSHABOccupatuonal Safety and Health Appeals Board
- OSHPDOffice of Statewide Health Planning and Development
- OSHPDOffice of Statewide Health Planning & Development
- OSHPDOffice of Statewide Health Planning, and Development
- OSHSBOccupational Safety and Health Standards Board
- OSHSBOccupational Safety & Health Standards Board
- OSIPOffice of Self Insurance Plans
- OSIPOffice of Self-Insurance Plans
- OSMOgficer Strength Manager
- OSOSOrthopaedic Surgical Osseointegration Society
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