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

Science and technology

Biochemistry and medicine

ATC code D01 D01A Antifungals for topical use D01AA Antibiotics :D01AA01 Nystatin :D01AA02 Natamycin :D01AA03 Hachimycin :D01AA04 Pecilocin :D01AA06 Mepartricin :D01AA07 Pyrrolnitrin :D01AA08 Griseofulvin :D01AA20 Combinations D01AC Imidazole and triazole de ...

''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 Vitamin D is a group of fat-soluble secosteroids responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, and many other biological effects. In humans, the most important compounds in this group are vitamin D3 (c ...

* DI,

Iodothyronine deiodinase Iodothyronine deiodinases ( and ) are a subfamily of deiodinase enzymes important in the activation and deactivation of thyroid hormones. Thyroxine (T4), the precursor of 3,5,3'-triiodothyronine (T3) is transformed into T3 by deiodinase activity ...

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 T-Mobile is the brand name used by some of the mobile communications subsidiaries of the German telecommunications company Deutsche Telekom AG in the Czech Republic (T-Mobile Czech Republic), Poland (T-Mobile Polska), the United States (T-Mobile ...

in Germany * D1, an abbreviation for DOCSIS 1.0 1.0, an international telecommunications standard *

D-1 (Sony) D-1 or 4:2:2 Component Digital is an SMPTE digital recording video standard, introduced in 1986 through efforts by SMPTE engineering committees. It started as a Sony and Bosch - BTS product and was the first major professional digital video f ...

, 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) Proton (Russian: Протон) (formal designation: UR-500) is an expendable launch system used for both commercial and Russian government space launches. The first Proton rocket was launched in 1965. Modern versions of the launch system are sti ...

, 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 Deutsche Flugzeug-Werke, usually known as DFW, was a German aircraft manufacturer of the early twentieth century. It was established by Bernhard Meyer and Erich Thiele at Lindenthal in 1910, and initially produced Farman designs under licence, lat ...

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 set about to create a German aircraft based on the Nieuport design. Th ...

Flugzeugbau Friedrichshafen Flugzeugbau Friedrichshafen GmbH was a German aircraft manufacturing company. Overview The company was founded in 1912 in Friedrichshafen, Germany by Theodor Kober who had previously worked for the Zeppelin company. The town, which is located by ...

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 The Hansa-Brandenburg D.I, also known as the KD (''Kampf Doppeldecker'') was a German fighter aircraft of World War I. Despite poor handling characteristics it was put into service by Austria-Hungary, where some aircraft served until the end of ...

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 The Austro-Hungarian Aviation Troops or Imperial and Royal Aviation Troops (german: Kaiserliche und Königliche Luftfahrtruppen or , hu, Császári és Királyi Légjárócsapatok) were the air force of the Austro-Hungarian Empire until the e ...

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

aircraft

Other uses in military

Char D1 The Char D1 was an Interwar French light tank. The French plan of 1926, calling for the creation of a Light Infantry Support Tank, led to the development of the existing Renault NC1 prototype into the Char D1. One hundred and sixty vehicles of th ...

, 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 The D-class Melbourne tram is a fleet of low-floor Combino trams that operate on the Melbourne tram network. They were built by Siemens in Uerdingen, Krefeld, Germany, and are divided into two classes: the three section D1-class which was introd ...

D1 multiple unit D1 (Д1) is a 4-car diesel multiple unit train built in 1960s-1980s by Hungarian producer Ganz-MAVAG for Soviet railways. D1M In 2012, Moldovan Railway and Electroputere VFU company in Romania started a complete modernization program for D1 ...

, 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 Class D I of the Royal Bavarian State Railways (''Königlich Bayerische Staatsbahn'') was a tank locomotive with two coupled axles designed for shunting. As had been specified, these locomotives were simple and robust. They had a double-frame, wit ...

, 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) The state road D1 ( hr, Državna cesta D1) is a national highway in Croatia. It is a one-lane highway that spans from Macelj border crossing in the north via Krapina, Zagreb, Karlovac, Slunj, Gračac, Knin, Sinj, ending in Split. I ...

D1 motorway (Czech Republic) The D1 highway ( cs, Dálnice D1) is the main highway of the Czech Republic. Currently it connects the two biggest Czech cities, Prague and Brno; in the future it will be extended to Ostrava and to the Czech–Polish border in Věřňovice (Karv ...

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 The BSA Bantam is a two-stroke unit construction motorcycle that was produced by the Birmingham Small Arms Company (BSA) from 1948 (as a 125 cc) until 1971 (as a 175 cc). Exact production figures are unknown, but it was over 250,000 ...

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 D1 Denby Darts is a bus route that runs between Huddersfield and Denby Dale via Skelmanthorpe. History In April 2019, two local councillors complained about the service, then numbered 233 and operated by Yorkshire Tiger, claiming that people a ...

, a bus service in Yorkshire, UK *

BYD D1 The BYD D1 is a purpose-built electric compact multi purpose vehicle (MPV) developed by BYD in cooperation with DiDi exclusively developed for ride-hailing services. History As of 2018, Didi formed an alliance with automakers including Volks ...

, an electric multi purpose vehicle (MPV)

Sports

NCAA Division I NCAA Division I (D-I) is the highest level of College athletics, intercollegiate athletics sanctioned by the National Collegiate Athletic Association (NCAA) in the United States, which accepts players globally. D-I schools include the major ...

, D-I, the highest division of American collegiate athletics *

D1 Grand Prix The , abbreviated as D1GP and subtitled ''Professional Drift'', is a production car drifting (motorsport), drifting series from Japan. After several years of hosting amateur drifting contests, Daijiro Inada, founder of ''Option (car magazine), O ...

, 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 Town and country planning in the United Kingdom is the part of English land law which concerns land use planning. Its goal is to ensure sustainable economic development and a better environment. Each country of the United Kingdom has its own pla ...

* 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 resear ...

*D1, a

discount store A discount store or discounter offers a retail format in which products are sold at prices that are in principle lower than an actual or supposed "full retail price". Discounters rely on bulk purchasing and efficient distribution to keep down cost ...

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, an Irish independent techno record label * D01, ECO code for the Richter-Veresov Attack chess opening *

Digital One Digital One is a national commercial digital radio multiplex in the United Kingdom, owned by Arqiva. , the multiplex covered more than 90% of the population from 137 transmitters. Coverage was extended to Northern Ireland in July 2013. It conta ...

- also known as D1 National, a digital radio multiplex in the United Kingdom