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SFD may stand for:

  • Single-family dwelling
  • Size frequency distribution for features such as asteroids and impact craters
  • Software Freedom Day, an annual worldwide celebration of Free Software
  • Start frame delimiter, a one-byte value marking the end of the preamble of an Ethernet frame
  • Schwarze Filmschaffende in Deutschland, a professional association based in Berlin, Germany
  • NYSE indicator of Smithfield Foods
  • Seconds From Disaster, a program on the National Geographic Channel that investigates on the worst man-made disasters and some natural disasters
  • Scottish First Division
  • Stress Field Detector
  • "Superfloppy" disk, a floppy disk variant
  • Spline Font Database, a FontForge font file format