| Acronym | Definition |
|---|
| PSSE | Powiatowa Stacja Sanitarno-Epidemiologiczna (Polish: Regional Sanitary-Epidemiological Station) |
| PSSE | Power System State Estimation (electronics) |
| PSSE | Pomorskiej Specjalnej Strefy Ekonomicznej (Polish: Pomeranian Special Economic Zone; est. 2001; Poland) |
| PSSE | Pomorska Specjalna Strefa Ekonomiczna (Polish: Pomeranian Special Economic Zone) |
| PSSE | Power System Simulator for Engineering (Siemens) |
| PSSE | Physical Separation in Science and Engineering (journal; Hindawi Publishing Corporation; Egypt and New York) |
| PSSE | Parallel Supercomputer Simulations for Education |
| PSSE | Parlamentarne Skupstine Saveta Evrope (Serbian: Parliamentary Assembly of the Council of Europe) |