D7

D7, D07, D.VII, D VII, D.7 or D-7 may refer to:

Arts and entertainment

 * D7, a chord (music)
 * D7, a note in the whistle register
 * D-7 (Wipers song), a song by the Wipers from the 1980 album Is This Real?
 * Covered by Nirvana on the 1992 album Hormoaning
 * D-7, a fictional Star Trek Klingon starship class

Businesses and organisations

 * Dinar Líneas Aéreas (1992–2002), IATA airline designator D7
 * AirAsia X, IATA airline designator D7
 * Digital 7, a group of national governments seeking to strengthen the digital economy

Places

 * D7 road (Croatia), a state road
 * D7 motorway (Czech Republic)
 * A Dublin postal district

Military

 * D.VII aircraft (disambiguation), a number of aircraft
 * Fokker D.VII, a German World War I fighter aircraft
 * HMS Patroller (D07), a 1943 British Royal Navy escort aircraft carrier
 * HMS D7, a Royal Navy submarine launched in 1911

Transportation and vehicles

 * Bavarian D VII, an 1880 German steam locomotive model
 * Caterpillar D7, a 1938 medium bulldozer
 * Dewoitine D.7, a 1920s French sport plane
 * Pennsylvania Railroad class D7, a steam locomotive
 * LNER Class D7, a class of British steam locomotives
 * ATS D7, a Formula One racing car
 * D7 Super, a BSA Bantam motorcycle

Other

 * ATC code D07, Corticosteroids, dermatological preparations, a subgroup of the Anatomical Therapeutic Chemical Classification System
 * D7 polytope, in 7-dimensional geometry
 * d7, a d electron count
 * DVCPRO (D-7), a professional digital video format