PEF
PEF, PeF, or Pef may stand for the following abbreviations:

 Palestine Exploration Fund
 Peak expiratory flow
 PEF Private University of Management Vienna
 Pentax raw file (see Raw image format)
 Pentecostal European Fellowship
 Perpetual Education Fund
 Perpetual Emigration Fund
 Pinellas Education Foundation, a nonprofit organization based in Florida
 Polyethylene 2,5-furandicarboxylate, a bioplastic material
 Preferred Executable Format
 Primary energy factor
 Princeton Evangelical Fellowship, a Christian campus ministry at Princeton University 
 Public Employees Federation, the New York state public employees union that is a member of AFL-CIO
 Punjab Education Foundation, a governmental education body in the Punjab, Pakistan

PEF may also refer to:
 the nickname of actor Pierre-François Martin-Laval