| OSTA | Oberlin Student Theater Association 
| Others |
| OSTA | Occupational Skill Testing Authority
| Others |
| OSTA | Occupational Skills Testing Authority
| Others |
| OSTA | Office of Science and Technology Assessment
| Others |
| OSTA | Office of Science Teaching Activities
| Others |
| OSTA | Office of Space and Terrestrial Application
| Others |
| OSTA | Office of Space and Terrestrial Applications
| Others |
| OSTA | Office of STEM Teaching Activities
| Others |
| OSTA | Office of the State Traffic Administration
| Others |
| OSTA | Ohio Security Traders Association
| Others |
| OSTA | Ohio Society of Traditional Archers
| Others |
| OSTA | Ohio State Trappers Association
| Others |
| OSTA | Oklahoma Science Teachers Association
| Others |
| OSTA | Olympus Surgical Technologies America
| Others |
| OSTA | Open Standard Telecom Architecture
| Others |
| OSTA | Open Systems Technology Associates
| Others |
| OSTA | Optical Storage Technology Association
| Others |
| OSTA | Oregon Science Teachers Association
| Others |