D1

{{wikt|D1}} '''D1''', '''D01''', '''D.I''', '''D.1''' or '''D-1''' can refer to:

{{TOC right}} ==Science and technology== ===Biochemistry and medicine=== * ATC code D01 ''Antifungals for dermatological use'', a subgroup of the Anatomical Therapeutic Chemical Classification System * Dopamine receptor D₁, a protein * Haplogroup D1 (Y-DNA) * Vitamin D₁, a form of Vitamin D * DI, Iodothyronine deiodinase type I, an enzyme involved with thyroid hormones

===Technology=== {{see also|#Military}} * Nikon D1, a digital single-lens reflex camera ** Nikon D1X, an updated version of the D1 ** Nikon D1H, an updated version of the D1 * D1, former brand of T-Mobile in Germany * D1, an abbreviation for DOCSIS 1.0 1.0, an international telecommunications standard * D-1 (Sony), an early digital video recording format * STS-61-A, also known as D-1, the 22nd mission of NASA's Space Shuttle program * D-1, from the Proton (rocket family), Russian rockets * Mercedes D.I, a 1913 German aircraft engine

==Military== ===World War I fighter aircraft=== * AEG D.I * Albatros D.I * Halberstadt D.I, experimental version of Halberstadt D.II (and Aviatik D.I variant) * Aviatik (Berg) D.I * Daimler D.I * Deutsche Flugzeug-Werke D.I * Euler D.I * Flugzeugbau Friedrichshafen D.I * Fokker D.I * Hansa-Brandenburg D.I * Junkers D.I * Knoller D.I, an Imperial and Royal Aviation Troops aircraft * Phönix D.I * Schütte-Lanz D.I * Siemens-Schuckert D.I * WKF D.I, an Imperial and Royal Aviation Troops aircraft ===Other uses in military=== * Char D1, a 1930s French tank * Dewoitine D.1, a 1920s French single-seat fighter aircraft * Dunne D.1, a 1907 British experimental aircraft * 152 mm howitzer M1943 (D-1), a Soviet World War II artillery system * {{HMS|D1}}, British early 20th century submarine * {{USS|D-1|SS-17}}, a 1909 American submarine

==Transportation== ===Locomotives and trams=== * D1-class, a variant of D-class Melbourne tram * D1 multiple unit, a train built in 1960s-1980s in Hungary for Soviet railways * LB&SCR D1 class, an 1873 British tank locomotive * NCC Class D1, a Northern Counties Committee Irish gauge steam locomotive * Pennsylvania Railroad class D1, an 1868 American steam locomotive * Bavarian D I, an 1871 Bavarian tank locomotive * Min'an Electric D01, a sports luxury vehicle

===Roads=== * D1 road (Croatia) * D1 motorway (Czech Republic) * D1 motorway (Slovakia)

===Other uses in transportation=== * D1, a model of BSA Bantam British motorcycle * D1, a commuter rail line of Moscow Central Diameters * D1, a route of the D (SEPTA Metro) * BYD D1, an electric multi purpose vehicle (MPV)

==Sports== * NCAA Division I, D-I, the highest division of American collegiate athletics * D1 Grand Prix, a production car drifting series from Japan * D1NZ, a production car drifting series in New Zealand

==Other uses== * D1 (building), a residential building in Dubai * D1 (Longs Peak), a technical climbing route in Colorado, U.S. * D1, a Dublin postal district * D1, a guitar model by C. F. Martin & Company * D1, a code in Town and country planning in the United Kingdom * D1, a transmitter equipped juvenile female bald eagle from the 2011 clutch of the Decorah Bald Eagles *D1, a discount store chain from Colombia. * D-1 visa, a non-immigrant U.S. visa * "D-1", a song from ''Yves'' (single) by Loona * D1 Recordings, an Irish independent techno record label * D01, ECO code for the Richter–Veresov Attack chess opening * Digital One - also known as D1 National, a digital radio multiplex in the United Kingdom * ''Dhoom'', a 2004 Indian Hindi-language action film by Sanjay Gadhvi, first part of the Dhoom film series * Diablo, a 1997 action role-playing video game by Blizzard Entertainment

== See also == * 1D (disambiguation) * Di (disambiguation)

{{Letter-Number Combination Disambiguation}}