PF may refer to:

Computer science

  • Page fault, a type of exception (error) in computer programming
  • Page file, a file used as an extension for computer memory
  • PF (firewall), OpenBSD's stateful packet filter
  • PF keys, a type of function keys on old keyboards



  • Power factor, or cos phi, of an AC electric power system
  • Purple fringing, a type of chromatic aberration in photography
  • Phenol formaldehyde resin, the earliest synthetic polymer
  • Picofarad (pF) or petafarad (PF), multiples of farad, the SI unit of electric capacitance (petafarads rarely if ever used)
  • Photon Factory, a synchrotron located at KEK in Tsukuba, Japan


Other uses