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| Thematik | Englisch | Rumänisch |
| Bauw. | open construction system | sistem de construcție deschis |
| Bauw. | open heat-supply system | sistem de încălzire cu racordare directă |
| Bauw. | open steam-heating system | sistem de încălzire cu abur cu circuit deschis |
| Bauw. | open system of typification | sistem de tipizare deschis |
| micr. | Open Systems Interconnection model | Interconectare sisteme deschise (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) |
| Kommunik., comp. | open systems interconnection reference model | model de referință OSI |
| Kommunik., comp. | open systems interconnection reference model | model de interconectare a sistemelor deschise |
| Allg. | open systems interconnection reference model | model OSI |
| Lüftung | open-type exhausting system | dispozitiv deschis de aspirație |