| Acronym | Definition |
|---|
| PECO➣Países da Europa Central e Oriental (Portugal) |
| PECO➣Pays d'Europe Centrale et Orientale (French: Countries of Central and Eastern Europe) |
| PECO➣Philadelphia Electric Company |
| PECO➣Public Education Capital Outlay |
| PECO➣Pelagic Cormorant (phalacrocorax pelagicus) |
| PECO➣Pecos National Historic Park (US National Park Service) |
| PECO➣Polyethoxylated Castor Oil (surfactant) |
| PECO➣Pakistan Engineering Company Ltd. |
| PECO➣Power, Ease-Of-Use, Compatibility, Overall Use |
| PECO➣Processing and Exploitation Coordination Office |