| PSPI | Parent School Partnership Initiatives 
| Others |
| PSPI | Penza State Pedagogical Institute
| Others |
| PSPI | Phantom And Stump Phenomena Interview
| Others |
| PSPI | Potentially Shippable Product Increment
| Others |
| PSPI | Potsdam Specialty Paper Inc
| Others |
| PSPI | Power System Planning and Implementation
| Others |
| PSPI | Power System Planning Implementation
| Others |
| PSPI | Precision Scientific Petroleum Instruments
| Others |
| PSPI | Prefinished Staining Products Inc
| Others |
| PSPI | Presentation Skills for the Petroleum Industry
| Others |
| PSPI | Prkachin and Solomon Pain Intensity
| Others |
| PSPI | Probably Something Postural Innit
| Others |
| PSPI | Process Safety Performance Indicators
| Others |
| PSPI | Product Sensitive Programming Interface
| Others |
| PSPI | Promoting Smokefree Pregnancies in Indiana
| Others |
| PSPI | Psychological Science in the Public Interest
| Others |
| PSPI | Public Service Properties Investments
| Others |
| PSPI | Pusat Studi Properti Indonesia
| Others |