| Acronym | Definition |
|---|
| OCSI➣One Connection System Integrator |
| OCSI➣One Call Systems International |
| OCSI➣Oxford Consultants for Social Inclusion |
| OCSI➣One-Call Systems International |
| OCSI➣Open Collaboration Services Initiative |
| OCSI➣On-Chip Spiral Inductor |
| OCSI➣Okinawa Christian School International (Okinawa, Japan) |
| OCSI➣Object-Oriented Client/Server Internet |