Statistical Package for the Social Sciences
Shield Plug Storage Station
Science Planning and Scheduling System
Statistical Package for Social Sciences
Science and Professional Services Sector
Secured Packet Switched Service
Shielding Plug Storage Station
short-pulse spallation source
slow potential shifts
Software Package for Statistics and Simulation
Space Surveillance Squadron
Specific Site Specifications
SPSS Inc.
Statistical Package for Social Science
Statistical Package of the Social Sciences
Statistical Programs for the Social Sciences
sustained potential shifts
South Pacific Software Services
Southern Poultry Science Society