PCE
- Communist Party of Spain
- Communist Party of Spain (Marxist–Leninist)
- Communist Party of Spain (Marxist–Leninist) (historical)
- Communist Party of Spain (Reconstituted)
- Energy conversion efficiency
- Eticyclidine
- List of patrol vessels of the United States Navy
- PC Engine
- Paavai College of Engineering
- Padmanava College of Engineering, Rourkela
- Pardubice
- Parents for Choice in Education
- Parliamentary Commissioner for the Environment
- Parti Communautaire Européen
- Partido Comunista del Ecuador
- Passenger car equivalent
- Path computation element
- Personal consumption expenditure
- Personal consumption expenditures price index
- Power cost equalization
- Prenatal cocaine exposure
- Principle of computational equivalence
- Pro-opiomelanocortin converting enzyme
- Pyrometric cone equivalent
- Tetrachloroethylene
- Workers' Party of Spain–Communist Unity