BEF may refer to:

Arts and media

  • BEF (image format), used by HDR PhotoStudio
  • Bibliothèque des Ecoles françaises d'Athènes et de Rome, mediaeval history books (1877–1960)
  • British Electric Foundation, a band (1981–2013)

Military

  • Brazilian Expeditionary Force, 1942–1945
  • British Expeditionary Force (World War I), 1914–1918
  • British Expeditionary Force (World War II), 1939–1940

Transport

  • Benfleet railway station, Essex, England (<code>BEF</code>)
  • Bluefields Airport, Nicaragua (IATA:<code>BEF</code>)

Other uses

  • Belgian franc, a defunct currency (ISO 4217:<code>BEF</code>)
  • Binary entropy function, in information theory
  • Bonus Expeditionary Force, an American veterans' protest
  • Bovine ephemeral fever
  • British Equestrian Federation, in horse racing
  • Black Eye Friday, British pre-Christmas revelry