| Acronym | Definition |
|---|
| PSSP | Protected Storage System Provider |
| PSSP | Parallel System Support Programs |
| PSSP | People's Solidarity for Social Progress (est. 1998) |
| PSSP | Professional Student Services Personnel |
| PSSP | Parallel System Support Program (IBM) |
| PSSP | Penicillin Susceptible Streptococcus Pneumoniae |
| PSSP | Potomac Society of Stereo Photographers |
| PSSP | Prostitutes' Safe Sex Project |
| PSSP | Personnel Security and Surety Program |
| PSSP | Peer Sexuality Support Programme (New Zealand) |
| PSSP | Pre-Separation Services Program |
| PSSP | Prefreshman Summer Science Program (Spelman College; Atlanta, GA) |