BDF or Bdf may refer to: Backward differentiation formula, a numerical method for solving ordinary differential equations Ballroom Dancers' Federation, a British organization for competitive ballroom dancers Bates Dance Festival, a yearly dance festival held at Bates College. Banca Dacia Felix (Dacia Felix Bank), a defunct Romanian bank Bedfordshire, a historic county in England, Chapman code Beiersdorf AG, a multinational corporation based in Hamburg, Germany Berlin Demography Forum, an annual international conference on demographic issues Board foot, unit of measure for volume of lumber Bois-des-Filion, Quebec, a town in Quebec, Canada Bund Deutscher Frauenvereine (1894-1933), a defunct German women's organization Technology Building Distribution Frame, a type of distribution frame in telecommunications PCI BDF (bus/device/function), a range of configurable addresses in PCI configuration space Glyph Bitmap Distribution Format, a file format for storing bitmap fonts Military Bangladesh Forces, the combined forces of Bangladesh during its war of independence in 1971 Bahrain Defense Force, the military of Bahrain Barbados Defence Force, the military of Barbados Belize Defence Force, the military of Belize Botswana Defence Force, the military of Botswana