| Acronym | Definition |
|---|
| OATC | Open Authentication Technology Committee |
| OATC | Oklahoma Assistive Technology Center (Oklahoma City, OK) |
| OATC | Oregon Association of Tax Consultants (Hillsboro, OR) |
| OATC | Oceanic Air Traffic Center (US Navy) |
| OATC | Order of the Arrow Trail Crew (Philmont Scout Ranch, Boy Scouts of America) |
| OATC | Overseas Air Traffic Control (US Navy) |
| OATC | Operational Advisor Training Course (warfare group) |
| OATC | Oregon Advanced Technology Consortium (Clackamas Community College) |
| OATC | Open Architecture Train Control |
| OATC | Oxford Airline Training Center (Arizona) |