OSSF

AcronymDefinition
OSSFOpen Source Software Foundry (Institute of Information Science; Taipei, Taiwan)
OSSFOn-Site Sewage Facility
OSSFOakland Small Schools Foundation (Oakland, CA)
OSSFOpen Society Support Foundation
OSSFOn-Site Septic Facilities (Texas Natural Resource Conservation Commission)
OSSFOnline Sport Stacking Federation (cup stacking)
OSSFOther Services Stock Fund