MSSF

AcronymDefinition
MSSFMycological Society of San Francisco
MSSFMulti Service Switching Forum
MSSFMassachusetts State Science Fair, Inc. (Sandwich, MA)
MSSFMarket Square Steeple Fund (church preservation; Portsmouth, NH)
MSSFMercury Special Situations Fund
MSSFMacrophage Stimulated Soluble Factor (pathology)