B3, B03, B.III or B-3 may refer to:

Military

American bombers

* Keystone B-3, a biplane bomber of the United States Army Air Corps * Next-Generation Bomber (2018 Bomber), next bomber follow-on to the B-2 stealth bomber program * Long Range Strike Bomber program, successor program to the 2018 Bomber program **

Northrop Grumman B-21 The Northrop Grumman B-21 Raider is an American strategic bomber under development for the United States Air Force (USAF) by Northrop Grumman. As part of the Long Range Strike Bomber (LRS-B) program, it is to be a long-range, stealth intercon ...

, a successor aircraft to the B-1 and B-52 bombers

German and Austro-Hungarian aircraft

AEG B.III The AEG B.III was a German two-seat biplane reconnaissance aircraft produced in very small numbers from 1915. It was a further refinement of the AEG B.I, B.I and AEG B.II, B.II, with a fresh Empennage, tailplane assembly, but was still only just ...

, a German reconnaissance aircraft * Albatros B.III, a German Idflieg B-class designation aircraft *

Aviatik B.III __NOTOC__ The Aviatik B.III was a reconnaissance aircraft built in Austria-Hungary during World War I. Aviatik's Austro-Hungarian subsidiary had built the German-designed B.II, and now further developed this design by adding a more powerful engi ...

, a 1916 Austro-Hungarian reconnaissance aircraft *

Euler B.III The LVG B.I was a 1910s German two-seat reconnaissance biplane designed by Luft-Verkehrs-Gesellschaft for the ''Luftstreitkräfte''. Development LVG had been involved in the operation of dirigibles before it started design, in 1912, of the comp ...

, a German Idflieg B-class designation aircraft *

Fokker B.III (disambiguation) The designation B.III was used for two completely unrelated aircraft produced by Fokker: * A reconnaissance biplane, flown by Austria-Hungary during World War I * A biplane flying boat, developed for the Dutch East Indies Naval Air Force in the 1 ...

, two aircraft models *

Halberstadt B.III The Halberstadt B-types of the Halberstädter Flugzeugwerke were two-seat unarmed reconnaissance/training aircraft of the German Air Force in the First World War. Development In 1914, Halberstadt developed a biplane with the Oberursel U.0 rotar ...

, a German Idflieg B-class designation aircraft * Kampfgeschwader 54, from its historic ''Geschwaderkennung'' code with the Luftwaffe in World War II *

Lohner B.III The Lohner B.II (originally designated Type C) was a military reconnaissance aircraft produced in Austria-Hungary during World War I. It was a development of the pre-war Lohner B.I, B.I design, incorporating changes requested by the Austro-Hungar ...

* LVG B.III, a 1910s German two-seat trainer biplane

Submarines

* USS ''B-3'' (SS-12), a United States Navy submarine * HMS ''B3'', a British B class submarine of the Royal Navy

Civilian transportation

Roads

B3 road (Kenya) Transport in Kenya refers to the transportation structure in Kenya. The country has an extensive network of paved and unpaved roads. Kenya's railway system links the nation's ports and major cities and connects Kenya with neighbouring Uganda. Th ...

* B3 road (Namibia) *

Bundesstraße 3 The Bundesstraße 3 (abbr. B3) is one of the longest federal highways in Germany. It begins in Buxtehude and continues through Bergen, Celle, Hanover, Alfeld, Einbeck, Göttingen, Kassel, Marburg, Frankfurt am Main, Darmstadt, Heidelberg, Karlsr ...

, a German national highway

Trains

* Alsace-Lorraine B 3, an Alsace-Lorraine P 1 class steam locomotive *

Bavarian B III Bavarian B IIIs were steam locomotives of the Royal Bavarian State Railways (''Königlich Bayerische Staatsbahn''). Eight examples were delivered by Maffei in 1852; the remainder came from Hartmann. The machines by Hartmann had great similarit ...

, an 1852 German steam locomotive model *

NCC Class B3 The LMS (Northern Counties Committee) Class B3 4-4-0 passenger steam locomotives were rebuilds of Belfast and Northern Counties Railway (BNCR) two-cylinder compound locomotives. They operated services throughout the NCC's broad gauge system ...

, an 1890 Irish 4-4-0 passenger steam locomotive *

NSB B3 NSB may refer to: Art, entertainment, and media * Natural Snow Buildings, a French experimental music duo *Nihilist Spasm Band, Canadian free improvisation musical collective *Nu skool breaks, a subgenre of breakbeat music originating during the p ...

(Class 3), Norwegian railway carriages

Other

B3 (New York City bus) The Metropolitan Transportation Authority (MTA) operates a number of bus routes in Brooklyn, New York, United States; one minor route is privately operated under a city franchise. Many of them are the direct descendants of streetcar lines (s ...

serving Brooklyn * Bellview Airlines (International Air Transport Association code B3)

Biology and medicine

* B3 (classification), a medical-based Paralympic disability sport classification for blind sport *

B3 domain The B3 DNA binding domain (DBD) is a highly conserved domain found exclusively in transcription factors (≥40 species) () combined with other domains (). It consists of 100-120 residues, includes seven beta strands and two alpha helices that ...

, a highly conserved plant DNA-binding domain *

Procyanidin B3 Procyanidin B3 is a B type proanthocyanidin. Procyanidin B3 is a catechin dimer ( catechin-(4α→8)-catechin). Natural occurrences It can be found in red wine, in barley, in beer, in peach or in ''Jatropha macrantha'', the Huanarpo Macho. ...

, a plant phenolic compound *

ATC code B03 B03A Iron preparations B03AA Iron bivalent, oral preparations :B03AA01 Ferrous glycine sulfate :B03AA02 Ferrous fumarate :B03AA03 Ferrous gluconate :B03AA04 Ferrous carbonate :B03AA05 Ferrous chloride :B03AA06 Ferrous succinate :B03AA07 Fer ...

''Antianemic preparations'', a subgroup of the Anatomical Therapeutic Chemical Classification System * Prodelphinidin B3, a plant phenolic compound * Vitamin B₃ (niacin)

Computing

* A TCSEC security class in the Trusted Computer System Evaluation Criteria * "B3 Coin" a

cryptocurrency A cryptocurrency, crypto-currency, or crypto is a digital currency designed to work as a medium of exchange through a computer network that is not reliant on any central authority, such as a government or bank, to uphold or maintain it. It i ...

Engines

* A type of four-cylinder Mazda B engine *

Benz B.III Benz, an old Germanic clan name dating to the fifth century (related to "bear", "war banner", "gau", or a "land by a waterway") also used in German () as an alternative for names such as Berthold, Bernhard, or Benedict, may refer to: People Su ...

, an engine powering the 1914

Friedrichshafen FF.33 Friedrichshafen FF.33 was a German single-engined reconnaissance three-bay wing structure biplane, using twin floats, designed by Flugzeugbau Friedrichshafen in 1914 for the ''Marine-Fliegerabteilung'' aviation forces of the ''Kaiserliche Mari ...

German aircraft

Music

B3 (band) B3 was an American pop boy band from New York City. They were formed in 2001 and were first produced by O-Jay of German dance band Real McCoy. Original members were Timothy Andrew Cruz (2001–2004), John Steven Sutherland (2001–2004) and Rod ...

, an American boy band most popular in Germany * ''B3'' (EP), a 2012 EP by alternative rock band Placebo * Hammond B-3, an electric organ

Other uses

* B3 (stock exchange) *

B_3^I

, the Bochvar logic in calculus * B03, Alekhine's Defence chess code * B3: Battle by the Bay, a 1996 ''Street Fighter'' tournament *

B3 oil field B3 is an oil and gas field in the Baltic sea. The field is located 80 km off the Polish coastal town Rozewie. The crude oil is also referred to as Rozewie crude. The API gravity of the crude is 42-43 and sulfur content of 0.12 wt%. The jack up ...

, an oil and gas field in the Baltic sea *

Model B3 chair The Wassily Chair, also known as the Model B3 chair, was designed by Marcel Breuer in 1925–1926 while he was the head of the cabinet-making workshop at the Bauhaus, in Dessau, Germany. Despite popular belief, the chair was not designed sp ...

, a 1925 German Wassili designer chair * A subclass of B-class stars in

stellar classification In astronomy, stellar classification is the classification of stars based on their stellar spectrum, spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a Prism (optics), prism or diffraction grati ...

* a permission code for Town and country planning in the United Kingdom * An

ISO 216 ISO 216 is an international standard for paper sizes, used around the world except in North America and parts of Latin America. The standard defines the "A", "B" and "C" series of paper sizes, including A4, the most commonly available paper size ...

international standard that defines paper size * B₃ the chemical formula for

triboracyclopropenyl The triboracyclopropenyl fragment is a cyclic structural motif in boron chemistry, named for its geometric similarity to cyclopropene. In contrast to nonplanar borane clusters that exhibit higher coordination numbers at boron (e.g., through 3-ce ...

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