| Subject | English | Serbian Latin |
| chem. | open system | otvoreni sistem |
| comp., MS | Open Systems Interconnection model | Open Systems Interconnection (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) |
| heat. | open vented system | otvoren sistem vodnog grejanja |
| tech. | open vented system | otvoreni sistem vodnog grejanja |
| airports | open-apron parking system | sistem slobodnog parkiranja letelica dalje od pristanišne zgrade |
| IT | open-loop system | sistem bez povratne sprege |
| econ. | open-system interconnection | međupovezivanje otvorenog sistema |