| Subject | English | Korean |
| IT | open system | 개방형 시스템 |
| IT | Open Systems Interconnect OSI model | 개방형 시스템간 상호접속OSI 모델 |
| comp., MS | Open Systems Interconnection model | 개방형 시스템 간 상호 연결 (A networking model introduced by the International Organization for Standardization (ISO) to promote multi-vendor interoperability. OSI is a seven-layered conceptual model consisting of the application, presentation, session, transport, network, data-link, and physical layers) |