D1, D01, D.I, D.1 or D-1 can refer to:

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) Haplogroup D1 or D-M174 is a subclade of Haplogroup D-CTS3946. This male haplogroup is found primarily in East Asia and the Andaman Islands, though it is also found regularly with low frequency in Central Asia and Mainland Southeast Asia. It's also ...

* Vitamin D₁, a form of Vitamin D * DI, Iodothyronine deiodinase type I, an enzyme involved with thyroid hormones

Technology

Nikon D1 The Nikon D1 is a digital single-lens reflex camera (DSLR) made by Nikon Corporation introduced on June 15, 1999. It featured a 2.7-megapixel image sensor, 4.5-frames-per-second continuous shooting, and accepted the full range of Nikon F-mount le ...

, a digital single-lens reflex camera * 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 STS-61-A (also known as Spacelab D-1) was the 22nd mission of NASA's Space Shuttle program. It was a scientific Spacelab mission, funded and directed by West Germany – hence the non-NASA designation of D-1 (for Deutschland-1). STS-61-A was th ...

, 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 The Mercedes D.I (also known as the Type E6F) was a six-cylinder, water-cooled, SOHC valvetrain inline engine developed in Germany for use in aircraft in 1913. Developing 75 kW (100 hp), it powered many German military aircraft during t ...

, a 1913 German aircraft engine

Military

World War I fighter aircraft

AEG D.I The AEG D.I was a biplane fighter of World War I. Three prototypes were ordered, but after the first two were involved in serious crashes, one of which killed flying ace Walter Höhndorf on September 5, 1917, development was cancelled. A triplan ...

Albatros D.I The Albatros D.I was a German fighter aircraft used during World War I. Although its operational career was short, it was the first of the Albatros D types which equipped the bulk of the German and Austrian fighter squadrons (''Jagdstaffeln'') fo ...

* Halberstadt D.I, experimental version of

Halberstadt D.II The Halberstadt D.II was a biplane fighter aircraft developed and manufactured by German aircraft company Halberstädter Flugzeugwerke. It was adopted by the ''Luftstreitkräfte'' (Imperial German Army Air Service) and served through the period ...

(and Aviatik D.I variant) *

Aviatik (Berg) D.I The Aviatik (Berg) D.I, was a single-engine, single-seater biplane fighter that was developed and manufactured by the Austro-Hungarian branch of German aircraft company Aviatik. It was also known as Berg D.I or the ''Berg Fighter'', because it ...

Daimler D.I The Daimler D.I (also known by the company designation L6) was a German fighter aircraft of World War I. It was a conventional biplane design with a very small interplane gap - the top wing nearly touched the top of the fuselage. Power was prov ...

* Deutsche Flugzeug-Werke D.I *

Euler D.I The Euler D.I was a German single-seat fighter based on the French Nieuport 17. After seeing the success of the French Nieuport 11 at the front, German designer August Euler August Euler (20 November 1868 – 1 July 1957) was a pioneer Germ ...

* Flugzeugbau Friedrichshafen D.I *

Fokker D.I The Fokker D.I (company designation M.18) was a development of the D.II fighter. The D.I was also flown in Austro-Hungarian service as a fighter trainer aircraft under the designation B.III. Confusing the matter further, both the D.II and D.I ar ...

* Hansa-Brandenburg D.I *

Junkers D.I The Junkers D.I (factory designation J 9) was a monoplane fighter aircraft produced in Germany late in World War I, significant for becoming the first all-metal fighter to enter service. The prototype, a private venture by Junkers named the J 7, ...

Knoller D.I __NOTOC__ The Knoller D.I series 70 was a prototype fighter aircraft built in the Austro-Hungarian Empire during World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global confl ...

, an Imperial and Royal Aviation Troops aircraft *

Phönix D.I The Phönix D.I, with the D.II and D.III variants, was an Austria-Hungary, Austro-Hungarian First World War biplane fighter built by the Phönix Flugzeug-Werke and based on the Hansa-Brandenburg D.I. Development The Phönix D.I was the second d ...

* Schütte-Lanz D.I *

Siemens-Schuckert D.I The Siemens-Schuckert D.I was a single-seat fighter built by Siemens-Schuckert Werke in 1916. It was a German copy of the French Nieuport 17 that was obsolete by the time it was available in numbers, so that it served mainly as an advanced train ...

WKF D.I The WFK D.I (series 85) was a fighter aircraft built in Austria-Hungary in the final months of World War I. Operational history The KuKLFT placed an order for 48 D.Is. However, only two aircraft were delivered by the time of the Armistice, and ...

, an Imperial and Royal Aviation Troops aircraft

Other uses in military

* Char D1, a 1930s French tank *

Dewoitine D.1 The Dewoitine D.1 was a French single-seat fighter aircraft of the 1920s, built by the French industrial company Dewoitine. Development The D.1 was the first airplane designed by Emile Dewoitine after he established his own company. The D.1 was ...

, a 1920s French single-seat fighter aircraft *

Dunne D.1 The Dunne D.1, was an experimental tailless aircraft built in the UK in 1907. It comprised a main unit which could be flown as a glider, to which a chassis unit with power train could be added. The glider achieved a short flight in 1907. The D. ...

, a 1907 British experimental aircraft *

152 mm howitzer M1943 (D-1) The D-1 howitzer M1943 (russian: 152-mm gaubitsa obr. 1943 g. (D-1)) is a Soviet World War II-era 152.4 mm howitzer. The gun was developed by the design bureau headed by F. F. Petrov in 1942 and 1943, based on the carriage of the 122 mm ho ...

, a Soviet World War II artillery system * , British early 20th century submarine * , 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 The LB&SCR D1 class were powerful 0-4-2 suburban passenger tank locomotives, designed by William Stroudley of the London Brighton and South Coast Railway in 1873. They were originally known as "D-tanks" but later reclassified as class D1. Member ...

, an 1873 British tank locomotive * NCC Class D1, a

Northern Counties Committee The Northern Counties Committee (NCC) was a railway that served the north-east of Ireland. It was built to Irish gauge () but later acquired a number of narrow gauge lines. It had its origins in the Belfast and Ballymena Railway that opened to ...

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 Min'an Electric (), also known as Min'an Auto, Min'an Motors, or simply Min'an, is a Chinese automobile manufacturer headquartered in Jiangsu, China, that specializes in producing electric vehicles. History Min'an Electric was founded in 2011 ...

, a sports luxury vehicle

Roads

* D1 road (Croatia) * D1 motorway (Czech Republic) *

D1 motorway (Slovakia) The D1 is a east-west motorway ( sk, diaľnica) in Slovakia. Its route is Bratislava ( D2/ D4) - Trnava ( R1) - Trenčín ( R2) - Púchov ( R6) - Žilina ( D3) - Martin ( R3) Ruzomberok ( R3) - Poprad - Prešov ( R4) - Košice (R4) - Michalov ...

Other uses in transportation

* D1, a model of BSA Bantam British motorcycle * D1, a commuter rail line of

Moscow Central Diameters The Moscow Central Diameters (MCD) (russian: links=no, Московские центральные диаметры (МЦД), Moskovskiye tsentralnye diametry (MTsD)) are a system of city train services on existing commuter rail lines in Moscow an ...

* D1 Denby Darts, a bus service in Yorkshire, UK * 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 D1NZ is a production car Drifting (motorsport), drifting series in New Zealand, a sanctioned championship under Motorsport New Zealand, the official FIA appointed governing body of motor-racing in New Zealand. It began early in 2003 as a small comp ...

, a production car drifting series in New Zealand

Other uses

D1 (building) D1 Tower is one of the main residential skyscrapers in Culture Village with a height of 284 metres (932 ft.). This 78 floor building has 526 units which include studio apartments, 1 bedroom apartments, 2 bedroom apartments, 3 bedroom apartments, 4 ...

, a residential building in Dubai *

D1 (Longs Peak) The D1 is the original technical climbing route up the Diamond of Longs Peak. In 1954, when National Park Service was petitioned to allow climbing on the Diamond they responded with an official closure. Climbing on the Diamond was banned until ...

, 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 transmittered juvenile female bald eagle from the 2011 clutch of the

Decorah Bald Eagles The Decorah Bald Eagles (also known as Decorah Eagles or variations) is a website featuring a live-streaming webcam trained on a bald eagle nest and family in Decorah, Iowa. The Raptor Resource Project installed and runs the live stream for resea ...

*D1, a discount store chain from Colombia. *

D-1 visa D1, D01, D.I, D.1 or D-1 can refer to: 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, Dopamine ...

, a non-immigrant U.S. visa * "D-1", a song from ''Yves'' (single) by Loona *

D1 Recordings D1 Recordings is an Irish independent techno record label founded in 1994 by Eamonn Doyle. It is named after the Dublin postcode in which it was located and has released music by artists from there and elsewhere. Ian Maleney wrote in ''The Irish ...

, 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