| Acronym | Definition |
|---|
| OSCI | Open SystemC Initiative |
| OSCI | Online Services Computer Interface |
| OSCI | Open System C Initiative |
| OSCI | Oscient Pharmaceuticals Corp. (stock symbol) |
| OSCI | One Stroke Certified Instructor |
| OSCI | Oberon System and Compiler Implementations |
| OSCI | Ohio Science Institute |
| OSCI | Oregon State Correctional Institution |
| OSCI | Octal Serial Communication Interface |
| OSCI | Oshkosh Correctional Institution (Wisconsin) |
| OSCI | Office for Social Concern and Involvement |
| OSCI | Onderwijs, Sociale zaken, Cultuur en Integratie |
| OSCI | Office of Security Operation-Iraq (Office of Security Operation-Iraq) |
| OSCI | Oral Sciences |
| OSCI | Omaha Soaring Club, Inc. |
| OSCI | Owner Supplied Contractor Installed (building construction) |
| OSCI | Ontario Stem Cell Initiative (Ontario, Canada) |