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HSSFHorrible Spreadsheet Format (Java implementation of Excel)
HSSFHealthy Soils for Sustainable Farms (Australia; Soil Health Knowledge Bank; workshop)
HSSFHealth and Social Service Facilities (Snohomish County, WA)
HSSFHeimler Scale of Social Functioning
HSSFHastings and St. Leonards Seniors' Forum (UK)
HSSFHAC/RMPE Software Support Facility
HSSFHolocaust Survivors of South Florida, Inc.