| Acronym | Definition |
|---|
| OAC➣On Approved Credit |
| OAC➣Ohio Athletic Conference |
| OAC➣Ohio Administrative Code |
| OAC➣Online Archive of California (California Digital Library) |
| OAC➣Oral Anticoagulant |
| OAC➣Ohio Arts Council (Columbus, OH) |
| OAC➣Oregon Agricultural College (est. 1907) |
| OAC➣Ontario Arts Council (Canada) |
| OAC➣Oklahoma Administrative Code |
| OAC➣Oversight and Accountability Commission (California) |
| OAC➣Odyssey Access Client (software) |
| OAC➣Oakland Airport Connector (transportation; Oakland, CA) |
| OAC➣Ontario Agricultural College |
| OAC➣Outdoor Activity Center (various locations) |
| OAC➣Osservatorio Astronomico Di Capodimonte (Italian: Astronomical Observatory of Capodimonte; Naples, Italy) |
| OAC➣Oregon Arts Commission (est. 1967) |
| OAC➣Occupational Advisory Committee (various locations) |
| OAC➣Ontario Autism Coalition (Ontario, Canada) |
| OAC➣Open Access College (various locations) |
| OAC➣Ordo Ab Chao (Latin: Order Out of Chaos) |
| OAC➣Ontario Academic Credit |
| OAC➣Open Air Campaigners (ministry) |
| OAC➣Ontario Aerospace Council |
| OAC➣Officer Advanced Course |
| OAC➣Oklahoma Aeronautics Commission |
| OAC➣Ontario Academic Credits |
| OAC➣Office of Antiboycott Compliance |
| OAC➣Ottawa Athletic Club (Canada) |
| OAC➣Olympic Aquatic Center (Washington) |
| OAC➣Open Agility Certificate (Dog Agility Title) |
| OAC➣Office of the Administrator for the Courts (Washington state agency) |
| OAC➣On A Call |
| OAC➣Objectivist Academic Center |
| OAC➣Orange Art Center (Pepper Pike, OH) |
| OAC➣Optical Active Cable |
| OAC➣Olympic Athletic Club (Seattle, Washington) |
| OAC➣One Arm Chin-Up |
| OAC➣Ohio Amish Country (Northeast Ohio) |
| OAC➣Office Advisory Council (various organizations) |
| OAC➣Office of the Administrator of the Courts (Washington state) |
| OAC➣Oceanic Area Control Center |
| OAC➣Operational Acceptance Criteria |
| OAC➣(Chiropractic) Oversight Advisory Committee (US DoD) |
| OAC➣Owner Architect Contractor |
| OAC➣Operation Argument Complexity |
| OAC➣Open Auto Classifieds (website) |
| OAC➣Orthodox Anglican Church |
| OAC➣Operand Address Calculation |
| OAC➣Operating Agency Code |
| OAC➣Ogihara America Corporation (metal stamping plant) |
| OAC➣Oral Aspirin Challenge |
| OAC➣Outdoor Advertising Council |
| OAC➣Office Allegation Coordinator |
| OAC➣Operator Assistance Centre (BT) |
| OAC➣Objective Assignment Chart (US Navy PPP based curriculum development) |
| OAC➣Ohio Athletic Club (sweep rowing and sculling) |
| OAC➣Original Airworthiness Certification |
| OAC➣Office of Arms Control |
| OAC➣Obstetric Assessment Clinic |
| OAC➣Odd Autocorrelation |
| OAC➣Official Acceptance of Construction |
| OAC➣Orenda Aerospace Corporation (Canada) |
| OAC➣Operations and Analysis Center |
| OAC➣Organizational Activity Code |
| OAC➣Oman Automobile Club (Muskat, Oman) |
| OAC➣Optimum Approach Cruise |
| OAC➣United States Army Ordnance Ammunition Command (Joliet, Illinois) |
| OAC➣Operational Affairs Committee (Universal Postal Union) |