OSF
OSF is an abbreviation for:
- Sergeant Major , military rank
- Onafhankelijke Senaatsfractie , a parliamentary group in the Dutch First Chamber
- Open Society Foundations by George Soros
- Open Software Foundation
- Open Science Framework
- Ordo Sancti Francisci , see Franciscan Sisters
* .osf stands for:
- Oberon symbol file , file extension for module interface files in the Component Pascal programming language
