| Abbreviation | Definition |
|---|---|
| OIT | OHIO Information Technology |
| OIT | Osaka Institute of Technology |
| OITD | Organisation for Information Technology Development |
| OITG | off Information Technology Grant |
| OKQ | Ok Cupid |
| OLTC | Open Learning Technology Corporation |
| OMT | Odense Maritime Technology |
| OMT | Office of Materials Technology |
| ONIT | Opportunities Necessary to Increase Technology |
| OORASS | Object-Oriented Role Analysis, Synthesis, and Structuring |
| OP | Optimus Prime |
| OPET | Office for Professional Education and Technology |
| OPGA | Organic Pin Grid Array |
| OPLF | Orbiter Processing and Landing Facility |
| OPMT | Office of Program Management and Technology |
| OPT | Open Plug in Technology |
| OPTIC | Ontario Photonics Technology Industry Cluster |
| ORPP | Open Robotics Peripheral Platform |
| ORTC | Ontario Rehabilitation Technology Consortium (Canada) |
| ORTC | Overall Roadmap Technology Characteristics (International Technology Roadmap for Semiconductors |