| Abbreviation | Definition |
|---|---|
| OBS | Output-Based Specification |
| OBSE | Ontology Based Software Engineering |
| OBSS | Objectivity Bespoke Software Specialists |
| OBSS | Open Business Software Solutions |
| OBST | Optimal-cost Binary Search Trees |
| OBT | Open Beta Test |
| OBTC | Optimized Block Truncation Coding |
| OC | Object Container |
| OC | Open Canvas |
| OCAP | OpenCable Application Platform |
| OCC | Object-oriented Compiler Construction |
| OCL | Object Constraint Language |
| OCM | Object-CMS Mapper |
| OCS | Operator Communications Software |
| OCSI | Open Collaboration Services Initiative |
| OCSM | Oracle Client Software Manager |
| ODAA | Open Dictionary API Alliance |
| ODBE | Object Data Base Extractor |
| ODBE | Office Data Base Editor |
| ODC | Offshore Development Center |