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D is the fourth letter of the Latin alphabet.

D or d may also refer to:


People with the nameEdit

  • D, the bass player for Australian band Testeagles
  • "D!" or "Dee!", names of Detlef Soost, a German dancer and choreographer

Arts, entertainment, and mediaEdit

Fictional entitiesEdit



Groups and labelsEdit

  • D (band), a Japanese rock/metal band
  • D Records, a former record label in Houston, Texas, US
  • "d:" or "d:?", often used to refer to the Christian rock band Delirious?
  • "The D", one of the names of comedy rock band Tenacious D


Other uses in musicEdit


  • D, a weekly supplement to the Italian newspaper la Repubblica
  • D Magazine, a magazine for the city of Dallas, Texas, US

Other uses in arts, entertainment, and mediaEdit

  • D (film), a 2005 Bollywood film
  • Initial D, a 1995 Japanese manga and anime about mountain drifting that has spawned several arcade and console games
  • D, the production code for the 1964 Doctor Who serial Marco Polo
  • "D" Is for Deadbeat, the fourth novel in Sue Grafton's "Alphabet mystery" series, published in 1987

Business and economicsEdit

Computing, technology, and engineeringEdit


  • .d, a file format used for Agilent MassHunter mass spectrometry software
  • .d, a pathname component suffix for a directory; for example with the init program
  • -d, a suffix of a daemon, a computer program that runs as a background process
  • D - Minimal Protection, a security division in the Trusted Computer System Evaluation Criteria

Programming languagesEdit


Mathematics and scienceEdit


  • Deci- (d), the SI prefix meaning one tenth

Astronomy and Earth scienceEdit


Biology, chemistry, and medicineEdit


Solid state physicsEdit



Other usesEdit

See alsoEdit