| Acronym | Definition |
|---|
| OCA➣Orthodox Church in America |
| OCA➣Organic Consumers Association |
| OCA➣Office of Consumer Affairs |
| OCA➣Oracle Certified Associate |
| OCA➣Organization of Chinese Americans |
| OCA➣Ocala (Amtrak station code; Ocala, FL) |
| OCA➣Olympic Council of Asia |
| OCA➣Open Content Alliance |
| OCA➣Optically Clear Adhesive |
| OCA➣Optimum Currency Area |
| OCA➣Office of the City Attorney (various locations) |
| OCA➣Office of Court Administration |
| OCA➣Ontario College of Art |
| OCA➣Orthodox Christians in America |
| OCA➣Ontario Court of Appeal (Canada) |
| OCA➣Office of Cultural Affairs (New Mexico, USA) |
| OCA➣Oxford Capacity Analysis (aka American Personality Analysis; Church of Scientology) |
| OCA➣Open Continuous Announcement (government jobs) |
| OCA➣Online Crash Analysis (Microsoft Windows) |
| OCA➣Open Client Adapter |
| OCA➣Oracle Certificate Authority |
| OCA➣Off-Hook Call Announce |
| OCA➣Object Content Architecture |
| OCA➣Online Crash Analysis |
| OCA➣Office of Consumer Advocate (Pennsylvania) |
| OCA➣Omaha Christian Academy (Omaha, NE) |
| OCA➣Oldsmobile Club of America |
| OCA➣Oculocutaneous Albinism (inherited disorder) |
| OCA➣Office of the Court Administrator |
| OCA➣Ontario Cattlemen’s Association |
| OCA➣Oregon Citizens Alliance (political group) |
| OCA➣Office of Compliance and Assessment (US Navy) |
| OCA➣oculocutaneous albinism |
| OCA➣Office of Campus Activities (various schools) |
| OCA➣Operational Control Authority |
| OCA➣Offsite Consequence Analysis |
| OCA➣Optimal Control Algorithm |
| OCA➣On-Chip Antenna (radiofrequency technology) |
| OCA➣Offensive Counter Air |
| OCA➣Ohio Citizen Action |
| OCA➣Ontario Camping Association (Toronto, ON, Canada) |
| OCA➣Obstacle Clearance Altitude |
| OCA➣Olympic Coordination Authority (Australia) |
| OCA➣Orthodontic Centers of America |
| OCA➣Optical Channel Analyzer |
| OCA➣Operational Command Authority |
| OCA➣Ontario Chiropractic Association (Association Chiropratique de l'Ontario) |
| OCA➣Outside Collection Agency |
| OCA➣Off-Campus Access (various schools) |
| OCA➣Obsessive Compulsive Anonymous |
| OCA➣Office of Congressional Affairs |
| OCA➣Oberlin College Archives (Ohio) |
| OCA➣Oceanic Control Area |
| OCA➣Ontario Comprehension Assessment (Canada) |
| OCA➣Occupational Competency Assessment (various schools) |
| OCA➣Off Course Alarm (navigation equipment) |
| OCA➣Organized Crime Agency of British Columbia (Canada) |
| OCA➣Outstanding Chapter Award (various organizations) |
| OCA➣On Call Allowance |
| OCA➣Orlando Culinary Academy |
| OCA➣Office of Community Affairs (law enforcement) |
| OCA➣One Cancels All (online stock trading) |
| OCA➣Oxygen Compatibility Assessment (US NASA) |
| OCA➣Operational Condition Assessment (US Army Corps of Engineers) |
| OCA➣Outdoor Council of Australia (Queensland, Australia) |
| OCA➣Originating Case Agency |
| OCA➣Office of Chief Architect (GSA) |
| OCA➣Ontario Citizens' Assembly |
| OCA➣Owner Controlled Area |
| OCA➣Ohio Chess Association |
| OCA➣Outstanding Cash Advance |
| OCA➣Office of Compliance Analytics (US IRS) |
| OCA➣Officials Club Automobielsport (Dutch Club of Flag and Rescuemarshals for Automobile-Sports) |
| OCA➣Oriimec Corporation of America |
| OCA➣Ohio Connections Academy (subdivision of US K-8 online school) |
| OCA➣Oxford Conservative Association (formerly Oxford University Conservative Association; UK) |
| OCA➣Overlapping Claim Area |
| OCA➣Objectivist Club Association |
| OCA➣Orbiter Communication Adapter |
| OCA➣Operating Cost Authority |
| OCA➣Overflow Channel Allocation |
| OCA➣Operational Capability Area (GIG IA architecture version 1.1) |
| OCA➣Older Coloradans Act |
| OCA➣Office Connect Analytics (IBM) |
| OCA➣Operational Concept Approved |
| OCA➣Overall Configuration Analyses |
| OCA➣One's Complement Adder |
| OCA➣Omni-Directional/Channel Assignment |
| OCA➣Original Controlling Authority |
| OCA➣Optimized Cage Antenna |
| OCA➣Organizational Culture Obstacle |
| OCA➣Original Classification/Classifying Authority |
| OCA➣Obligation Cost Authority |