| Subject | English | Italian |
| IT | open software | software con codice sorgente aperto |
| comp., MS | Open Software Descriptor file | file Open Software Descriptor (An XML-based file that instructs the client on how to retrieve the sequenced application from the Application Virtualization Management/Streaming Server and how to run the sequenced application in its virtual environment) |
| IT | Open Software Foundation | Open Systems Foundation |
| IT | Open Software Foundation | Open Software Foundation |
| IT | open source software | software con codice sorgente aperto |
| stat. | open source software | software libero |
| econ. | open source software | software open source/a codice sorgente aperto |
| IT | Software environment for the design of open distributed systems | ambiente software per le progettazione di sistemi aperti distribuiti |