PCE
PCE may stand for:

Business and economics
Personal consumption expenditure, or private consumption expenditure
Personal consumption expenditures price index, a measure of inflation

Chemistry and engineering
PCE or eticyclidine, an illegal drug related to Phencyclidine (PCP)
Tetrachloroethylene (perchloroethylene), widely used in dry-cleaning
Pro-opiomelanocortin converting enzyme, an enzyme
Pyrometric cone equivalent, measuring heat in the firing of pottery
Power conversion efficiency, a near synonym for "Energy conversion efficiency" often used in the field of photovoltaics

Computing
Path computation element, a network element used for pathfinding
Principle of computational equivalence, a concept developed by Stephen Wolfram published in the book A New Kind of Science
PC Engine, a video game console

Medicine
Prenatal cocaine exposure, exposure of a fetus to cocaine when a pregnant woman uses the drug
Eticyclidine, a dissociative anesthetic drug

Organizations
Paavai College of Engineering, Namakkal, Tamil Nadu, India
Padmanava College of Engineering, Rourkela, an engineering college in Rourkela, Orissa state, India
Parents for Choice in Education, an advocacy group in Utah, U.S.
Parliamentary Commissioner for the Environment, New Zealand government agency

Political parties
Spain
PCE, Communist Party of Spain or "Partido Comunista de España"
PCE(i), Communist Party of Spain (International)(1975) or Partido Comunista de España(Internacional)
PCE(m-l), Communist Party of Spain (Marxist–Leninist) or Partido Comunista de España (Marxista-Leninista)
PCE(ML), Communist Party of Spain (Marxist–Leninist) (historical) or Partido Comunista de España (Marxista-Leninista)
PCE(M-R), Workers Party of Spain–Communist Unity or Partido de los Trabajadores de España–Unidad Comunista
PCE(R), Communist Party of Spain (Reconstituted) or Partido Comunista de España (Reconstituido)

Other countries
Parti Communautaire Européen, a political party in Belgium
Partido Comunista del Ecuador, the Communist Party of Ecuador

Other
ISO 639:pce or Palaung language, spoken in Burma and neighboring countries
Passenger car equivalent, a measure of traffic flow
PCE-842-class patrol craft, U.S. Navy patrol craft escorts, many of which were transferred to the Philippine Navy
Power cost equalization, a state subsidy in Alaska
Parduice