| OAC | Oakland Airport Connector 
| Others |
| OAC | Oaktree Acquisition Corp
| Others |
| OAC | Oakville Assembly Complex
| Others |
| OAC | Obesity Action Coalition
| Others |
| OAC | Objective Assignment Chart
| Others |
| OAC | Objectivist Academic Center
| Others |
| OAC | Oceanographic Advisory Committee
| Others |
| OAC | Oconomowoc Arts Center
| Others |
| OAC | Odd Auto-Correlation
| Others |
| OAC | Odyssey Access Client
| Others |
| OAC | Odyssey Adventure Club
| Others |
| OAC | Offical Artist Channel
| Others |
| OAC | Office Automation Conference
| Others |
| OAC | Office of Accountability and Compliance
| Others |
| OAC | Office of Administrative Courts
| Others |
| OAC | Office of Advanced Cyberinfrastructure
| Others |
| OAC | Office of Anti-boycott Compliance
| Others |
| OAC | Office of Antiboycott Compliance
| Others |
| OAC | Office of Arts and Culture
| Others |
| OAC | Office of the Administrator for the Courts ( Washington)
| Others |
| OAC | Official Acceptance of Construction
| Others |
| OAC | Official Artist Channel
| Others |
| OAC | Ogden Athletic Club
| Others |
| OAC | Ohio Administrative Code
| Others |
| OAC | Ohio Arts Council
| Others |
| OAC | Ohio Arts Council's
| Others |
| OAC | Ohio Athletic Committee
| Others |
| OAC | Ohio Athletic Conference
| Others |
| OAC | Oklahoma Administrative Code
| Others |
| OAC | Oklahoma Aeronautics Commission
| Others |
| OAC | Oklahoma Arts Council
| Others |
| OAC | Oliver And Company
| Others |
| OAC | Olympic Advisory Committee
| Others |
| OAC | Omeprazole Amoxicillin and Clarithromycin
| Others |
| OAC | on Abbreviations com
| Others |
| OAC | On Approval of Credit
| Others |
| OAC | On Approved Credit
| Others |
| OAC | Online Accessibility Center
| Others |
| OAC | Online Archive of California
| Others |
| OAC | Online Authorization Code
| Others |
| OAC | Only At Christmas
| Others |
| OAC | Ontario Academic Credit
| Others |
| OAC | Ontario Academic Credits
| Others |
| OAC | Ontario Advanced Credit
| Others |
| OAC | Ontario Aerospace Council
| Others |
| OAC | Ontario Agricultural College
| Others |
| OAC | Ontario Arts Council
| Others |
| OAC | Opel Astra Club
| Others |
| OAC | Open Access Consumer
| Others |
| OAC | Open Alcohol Container
| Others |
| OAC | Open Annotation Collaboration
| Others |
| OAC | Operation Analysis and Control
| Others |
| OAC | Operations Advisory Committee
| Others |
| OAC | Opportunity Awareness Center
| Others |
| OAC | Optical Absorption Coefficient
| Others |
| OAC | Optical Area Correlator
| Others |
| OAC | OptiX API Capture
| Others |
| OAC | Oracle Advanced Compression
| Others |
| OAC | Oracle Analytics Cloud
| Others |
| OAC | Ordo Ab Chao
| Others |
| OAC | Oregon Arts Commission
| Others |
| OAC | Organization for African Community
| Others |
| OAC | Organizational Adjudication Committee
| Others |
| OAC | Orientation Assessment Counseling
| Others |
| OAC | Origin Access Control
| Internet, Cloud Computing, AWS |
| OAC | Original Affordable Curated
| Others |
| OAC | Original Air Con
| Others |
| OAC | Ottawa Area Center
| Others |
| OAC | Outdoor Activities Camp
| Others |
| OAC | Outdoor Activities Committee
| Others |
| OAC | Outdoor Adventure Center
| Others |
| OAC | Outdoor Adventures Center
| Others |
| OAC | Output Audio Codec
| Others |
| OAC | Output Audio CODEC (CODer-DECoder)
| Others |
| OAC | Outreach And Church
| Others |
| OAC | Outsourced Adventure Camp
| Others |
| OAC | Overcome Any Challenge
| Others |
| OAC | Overseas Automotive Council
| Others |
| OAC | Oversight and Advisory Committee
| Others |
| OAC | Owner-Architect-Contractor Meetings
| Others |
| OAC | Oyster Advisory Commission
| Others |