| Subject | Polish | Czech |
| comp., MS | formaty Office Open XML | otevřené formáty Office Open XML |
| comp., MS | formaty Open XML | otevřené formáty Open XML |
| comp., MS | ODBC, Open Database Connectivity | rozhraní ODBC (Open Database Connectivity) |
| comp., MS | Open Systems Interconnection | model OSI |
| comp., MS | plik Open Software Descriptor | soubor OSD (Open Software Descriptor) |