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| English | Thesaurus |
| Crisis Response Operations in NATO Open Systems programme | CRONOS |
| Network Open Services Architecture | NOSA |
| Network Open Services Architecture | NOCA |
| Open Data Services | ODS (Microsoft) |
| Open Directory Services Interface | ODSI |
| Open License Program | olp (программа лицензирования продукции Microsoft Oleg Sollogub) |
| Open Network Distribution Services | ONDS (IBM) |
| Windows Open Services API | WOSA |
| Windows Open Services Architecture | WOSA |
| Windows Open Services Architecture | WOCA |
| Windows Open Services/Systems Architecture | WOSA (Microsoft) |
| X/Open Backup Services API | X/BSA |