WSSOWorkstation Single Sign on
WSSOWeb Single Sign On
WSSOWest Shore Symphony Orchestra
WSSOWomen's Studies Student Organization (University of Alabama)
WSSOWeb Self Service Option
WSSOWeapon System Support Officer
WSSOWaste Storage and Shipping Operations
WSSOWashington State Specific Objective
WSSOWing Special Services Officer (US AFROTC)
WSSOWorld Scout Security Organisation
WSSOWashington State Special Olympics
WSSOWestern Software Support Office (US Army)
WSSOWomen Studies Student Organization (University of Georgia)