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