| Abbreviation | Definition |
|---|---|
| OGSA-SEC-WG | Open Grid Services Architecture Security Working Group |
| OHC | Online Help Conference |
| OHS | Open Hypertext System |
| OI | Object Interface |
| OI | Online Innovation |
| OIC | Object In C |
| OID | Object IDentifier |
| OIGF | of the Inspector general Forests |
| OIGF | of the Inspector General of Forests |
| OIGI | Office of the Inspector General of Intelligence |
| OIL | Ontology Interchange Language |
| OIM | Object-Interaction Model |
| OIM | Open Information Model |
| OIO | Object Input/ Output |
| OIO | Open Infrastructure For Outcomes |
| OIP | Open Internet Platform |
| OIS | Online Information System |
| OIS | Open Interface Specification |
| OISC | One Instruction Set Computer |
| OIT | Office of Information Technology |