| ORCA | Oak Ridge Cyber Analytics 
| Others |
| ORCA | Oakland Radio Communication Association
| Others |
| ORCA | Oatmeal Raisin Cookie Ale
| Others |
| ORCA | Object Oriented Reconstruction for Cms Analysis
| Others |
| ORCA | Object Oriented Requirements Capture and Analysis
| Others |
| ORCA | Objects Relationships CTAs and Attributes
| Others |
| ORCA | Occupational Researcher's Computer Assistant
| Others |
| ORCA | Occupational Researchers Computer Assistant
| Others |
| ORCA | Ocean Research and Conservation Association
| Others |
| ORCA | Ocean Research College Academy
| Others |
| ORCA | Oceanic Research Centre Australia
| Others |
| ORCA | Off Road Club Arad
| Others |
| ORCA | Office of Rural Community Affairs
| Others |
| ORCA | Office on Returning Citizen Affairs
| Others |
| ORCA | Office on Returning Citizens Affairs
| Others |
| ORCA | Olympic Rally Competition Association
| Others |
| ORCA | On-line Reporting and Charting Application
| Others |
| ORCA | Oncology Resource Compliance Application
| Others |
| ORCA | One Really Cool Application
| Others |
| ORCA | One Regional Card for All
| Others |
| ORCA | Online Racing Championship Association
| Others |
| ORCA | Online Record Of Clinical Activity
| Others |
| ORCA | Online Reporting of Campaign Activity
| Others |
| ORCA | Online Representations and Certifications Application
| Others |
| ORCA | Online Research Collections Australia
| Others |
| ORCA | Only Rendered Creations Accepted
| Others |
| ORCA | Ontario Recreational Canoeing Association
| Others |
| ORCA | Ontario Residential Care Association
| Others |
| ORCA | Ontario Retirement Communities Association
| Others |
| ORCA | Open Repository Case API (Application Programmer Interface)
| Others |
| ORCA | Open Research Content Archive
| Others |
| ORCA | Open Resort Of Computer Applications
| Others |
| ORCA | Open Robot Controller Architecture
| Others |
| ORCA | Operational Research and Coaching for Analysts
| Others |
| ORCA | Operations Research and Computational Analysis
| Others |
| ORCA | Operations Research and Cyber Analysis
| Others |
| ORCA | Optical and RF Constellation on Aircraft
| Others |
| ORCA | Optical Rural Community Access
| Others |
| ORCA | Optimized Reconfigurable Cell Array
| Others |
| ORCA | Option Rom for Configuring Arrays
| Others |
| ORCA | Orchestration and Reconfiguration Control Architecture
| Others |
| ORCA | Oregon Readers Choice Award
| Others |
| ORCA | Organic Reclamation and Composting Association
| Others |
| ORCA | Organic Refuse Conversion Alternative
| Others |
| ORCA | Organization for Reinforcement Contingencies with
| Others |
| ORCA | Organization For Respect Compassion For Animals
| Others |
| ORCA | Organization For Responsible Care Of Animals
| Others |
| ORCA | Organization for the Responsible Care of Animals
| Others |
| ORCA | Organization Of Regional Coastal Activists
| Others |
| ORCA | Organized Red Cross Activities
| Others |
| ORCA | Organized Retail Crime Association
| Others |
| ORCA | Otonabee Region Conservation Authority
| Others |
| ORCA | Outdoor Recreation Company of America
| Others |
| ORCA | Outdoor Recreation Corporation of America
| Others |
| ORCA | Overlay Risk Currency and Alpha
| Others |
| ORCA | Oxidation Removal Containment Appearance
| Others |
| ORCA | Oxygen Regulator Console Assembly
| Others |