Operational Test Command Officer in Tactical Command Over the Counter Ozone Transport Commission Operating Telephone Company Operating Telefone Company Operational Test Center Orbiter Test Conductor Overhead Trip Computer Over-the-Counter Officer Training Corps Official Test Centre Online Training Center Ouachita Technical College oxytetracycline Occupational Training Center Ocean Thermal Conversion ochratoxin C odor threshold concentration off the case Office for Topography and Cartography Office of Technical Coordination Office of Technology Commercialization Office of Treaty Compliance OFFICE TECHNOLOGY CENTER Office Technology Coordinator Officers' Training Corp Officers Training Corps Offshore Technology Conference offsite training center