| Acronym | Definition |
|---|
| PCEI➣Palouse-Clearwater Environmental Institute (Moscow, ID) |
| PCEI➣Parametric Cost Estimating Initiative (US DoD) |
| PCEI➣Pew Civic Entrepreneur Initiative (Pew Partnership for Civic Change; Charlottesville, VA) |
| PCEI➣Polish Chamber of Exhibition Industry (Glogowska, Poland) |
| PCEI➣Porter County Education Interlocal (Valparaiso, IN) |
| PCEI➣Presentation Connection Endpoint Identifier |