| SSPI | First Shanghai Sewerage Project 
| Others |
| SSPI | Safety Short Production, Inc.
| Others |
| SSPI | Salle de Soins Post Interventionnels
| Others |
| SSPI | Salle de Surveillance Post Interventionnelle
| Others |
| SSPI | Screening Scale for Pedophilic Interests
| Others |
| SSPI | Security Service Provider Interface
| Others |
| SSPI | Security Support Programming Interface
| Others |
| SSPI | Semakan Status Perjalanan Imigresen
| Others |
| SSPI | Signs and Symptoms of Psychotic Illness
| Others |
| SSPI | Slovak Security Policy Institute
| Others |
| SSPI | Society of Satellite Professionals International
| Others |
| SSPI | Solid State Pharma Inc
| Others |
| SSPI | Solo and Small Practice Incubator
| Others |
| SSPI | Solo Small Practice Incubator
| Others |
| SSPI | South Suburban Police Institute
| Others |
| SSPI | Space Solar Power Initiative
| Others |
| SSPI | Specialty Silicone Products, Incorporated
| Others |
| SSPI | Spectrum Signal Processing, Inc.
| Others |
| SSPI | State Superintendent of Public Instruction
| Others |
| SSPI | Statistical Software Process Improvement
| Others |
| SSPI | Student Services Programming and Implementation
| Others |
| SSPI | Summer Service Project Internship
| Others |
| SSPI | Sustainable Sea Products International
| Others |
| SSPI | Synchronous Serial Peripheral Interface
| Others |
| SSPI | System Support Products Inc
| Others |
| SSPI | System Support Products, Inc.
| Others |