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As a three letter acronym, W.F.O can be:

  • Well-founded ordering in mathematics; see well-founded relation
  • W.F.O., a 1994 album by the thrash metal band Overkill.
  • "WFO", a popular 1970s term used in Off-road racing. It is an acronym for "Wide Fuckin' Open", meaning "to run at full throttle with uncaring abandon".
  • "Radio Wide Open/ WFO", a NASCAR Sirius XM (satellite) Radio show hosted by Joe Castello and Thommy Noodlez.
  • Weather Forecast Office, a local forecasting and warning office of the National Weather Service
  • Washington Field Office, of either the United States Secret Service or the FBI.