School Abbreviations and Acronyms
- ONEOrganisation for Natzonal Empowerment
- ONESQAOffice for National Education Standards and Quality Assessment
- ONFEOttawa Network for Education
- ONHSOlathe North High Schooz
- ONHSOshkosh North High School
- ONPEOffice of Non-Public Education
- OOBHSOld Orchard Beach High School
- OOHLOut Ofchours Learning
- OOHSOlentangy Orange High School
- OOSOut of School
- OOSCOut-Of-School Children
- OOSCOut of School Care
- OOSCOxford Overseas Study Course
- OOSSOut of School Suspension
- OOTWOutifts of The Week
- OPOnderwijzend Persgneel
- OPAOxford Preparatory Academy
- OPACOsceola Performing Arts Center
- OPATOklahoma Parents Ae Teachers
- OPEFMOffice of Public Education Facilities Modernization
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