| ORCA | Ontario Recreational Canoeing Association | |
| ORCA | On-line Reporting and Charting Application | |
| ORCA | One Really Cool Application | |
| ORCA | Online Representations and Certifications Application | |
| ORCA | Otonabee Region Conservation Authority | |
| ORCA | One Regional Card for All | |
| ORCA | Organization for Reinforcement Contingencies with | |
| ORCA | Ocean Research and Conservation Association | |
| ORCA | Organic Refuse Conversion Alternative | |
| ORCA | Office of Rural Community Affairs | |
| ORCA | Oatmeal Raisin Cookie Ale | |
| ORCA | Ontario Retirement Communities Association | |
| ORCA | Organized Retail Crime Association | |
| ORCA | Organized Retail Crime Association | |
| ORCA | Ocean Research College Academy | |
| ORCA | Ocean Research College Academy | |
| ORCA | Ocean Research College Academy | |
| ORCA | Outdoor Recreation Company of America | |
| ORCA | Optical and RF Constellation on Aircraft | |
| ORCA | Oncology Resource Compliance Application | |
| ORCA | Operational Research and Coaching for Analysts | |
| ORCA | Open Research Content Archive | |
| ORCA | Oregon Readers Choice Award | |
| ORCA | Oak Ridge Cyber Analytics | |
| ORCA | Organic Reclamation and Composting Association |
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