B4, B04, B.IV or B-4 may refer to:

Transportation

Aviation

Auster B.4 The Auster B.4 was an unusual British development of the Auster family of light aircraft in an attempt to create a light cargo aircraft. Design The conventional fuselage was considerably redesigned, turning it into a pod-and-boom configurat ...

, 1951 British light transport aircraft with rear ramp *

B.A.C.H. Flugbetriebs In music, the BACH motif is the motif, a succession of notes important or characteristic to a piece, ''B flat, A, C, B natural''. In German musical nomenclature, in which the note ''B natural'' is named ''H'' and the ''B flat'' nam ...

IATA airline designator (ICAO BCF) * Bankair IATA code, ICAO airline designator (BKA) * Bensen B-4,

Bensen Aircraft The Bensen Aircraft Corporation was established by Dr. Igor Bensen at Raleigh-Durham International Airport in North Carolina in 1952 to develop and market a variety of helicopters and autogyros of Bensen's own design. History The most successfu ...

autogyro *

Bäumer B IV Sausewind Bäumer is a German surname. Notable people with the surname include: * Gertrud Bäumer (1873–1954), German lawyer and politician * Jens Bäumer (born 1978), German footballer * Ludwig Bäumer (1888–1928), German writer and Communist activist ...

, German 1920s sports aircraft *

Flyglobespan Flyglobespan was a low-cost airline based in Edinburgh, Scotland. It operated scheduled services from five airports across Scotland, England and Ireland to destinations in Europe, North America, North Africa and South Africa. Its main bases w ...

IATA airline designator *

Fokker B.IV The Fokker F-11 was a luxury flying boat produced as an ' air yacht' in the United States in the late 1920s. Technically the aircraft was the Fokker Aircraft Corporation of America's Model 9. It was sold in North America as the Fokker F-11 and ...

, parent company's designation for American branch's F.11 seaplane * Hawker B 4, Swedish designation for Hawker Hart biplane *

Keystone B-4 The Keystone B-4 was a biplane bomber, built by the Keystone Aircraft company for the United States Army Air Corps. Design and development Originally ordered by the United States Army Air Corps as the LB-13 light bomber. When the ''LB-'' design ...

, United States biplane bomber * Lohner B.IV, an Austro-Hungarian World War 1 reconnaissance biplane * Pilatus B-4, Swiss glider also designated PC-11.

Locomotives

Alsace-Lorraine B 4 The first four steam locomotives designated as Class B IX by the Royal Bavarian State Railways were procured from the locomotive works of '' Strousberg''. They were transferred in 1872 to the Imperial Railways in Alsace-Lorraine. For the remainde ...

, an Alsace-Lorraine P 1 class steam locomotive * Bavarian B IV, an 1852 German steam locomotive * GSR Class B4, a former Cork, Bandon and South Coast Railway steam locomotive of the Great Southern Railways, Ireland * LSWR B4 class, an 1891 British dock tank locomotive * PRR B4, an American

Pennsylvania Railroad The Pennsylvania Railroad (reporting mark PRR), legal name The Pennsylvania Railroad Company also known as the "Pennsy", was an American Class I railroad that was established in 1846 and headquartered in Philadelphia, Pennsylvania. It was named ...

steam locomotive * Soo Line B-4 class, an American 0-6-0 steam locomotive * LB&SCR B4 class, a British tender locomotive

Automotive uses

* Subaru B4, the name under which the

Subaru Legacy The is a mid-size car built by Japanese automobile manufacturer Subaru since 1989. The maker's flagship car, it is unique in its class for offering all-wheel drive as a standard feature, and Subaru's traditional boxer engine. The Legacy was s ...

is marketed in Israel *

B4 (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 (see li ...

, serving Brooklyn * B4 road (Namibia) *

Bundesstraße 4 The Bundesstraße 4 (abbr. B4) is a German federal highway running in a northwesterly to southly direction from the state of Schleswig-Holstein to Bavaria. It provides a direct route for motorists traveling between Hamburg and Nuremberg. The sec ...

, federal highway in Germany

In the military

Handpainted Wayzata soldier's flight bag back

* HMS ''B4'', a British B-class submarine of the Royal Navy *

, a United States Army Air Corps biplane bomber * SM ''UB-4'', a 1915 German U-boat * 203-mm howitzer M1931 (B-4, "Stalins Hammer"), a World War II Soviet ordnance piece * B-4 a US Air Force/USAAF

flight bag A flight bag can refer to any baggage taken on board a flight, but usually refers to a specific type of document bag carried by pilots and flight crews. Often adorned with an airline logo, at one time the flight bag was a chic fashion accessory. I ...

* A level of

vehicle armour Military vehicles are commonly armoured (or armored; see spelling differences) to withstand the impact of shrapnel, bullets, shells, rockets, and missiles, protecting the personnel inside from enemy fire. Such vehicles include armoured fighti ...

In science

Leukotriene B4 receptor The leukotriene B4 receptors (BLTRs) include the following two receptors: * Leukotriene B4 receptor 1 (BLTR1) * Leukotriene B4 receptor 2 (BLTR2) See also * Eicosanoid receptor Most of the eicosanoid receptors are integral membrane protein G ...

and Leukotriene B4 receptor 2, two human genes *

Lipoxin B4 A lipoxin (LX or Lx), an acronym for lipoxygenase interaction product, is a bioactive autacoid metabolite of arachidonic acid made by various cell types. They are categorized as nonclassic eicosanoids and members of the specialized pro-resol ...

, a lipoxin * Proanthocyanidin B4, a B type proanthocyanidin *

Vitamin B4 Vitamin B4 is a former designation given to several distinct chemical compounds, none of which is currently considered a true vitamin: * Adenine * Carnitine Carnitine is a quaternary ammonium compound involved in metabolism in most mammals, p ...

, an alternate name for adenine * A

stellar classification In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting t ...

In entertainment

* ''B4'' (music show), a defunct British music video show broadcast on Channel 4 * B4 (TV channel), a defunct British music television channel * B-4 (Star Trek), an android in the ''Star Trek'' fictional universe *

Babylon 4 ''Babylon 5'' is an American space opera television series created by writer and producer J. Michael Straczynski, under the Babylonian Productions label, in association with Straczynski's Synthetic Worlds Ltd. and Warner Bros. Television, War ...

space station, predecessor to Babylon 5 from the ''Babylon 5'' television series * The Lost City (B4), a ''Dungeons & Dragons'' adventure module

Other uses

* B4 (classification), a parasports classification for visually impaired athletes * B4 ''Street Fighter'' Championships, a 2000 fighting game tournament * B4 or B4 II, a

Native Instruments Native Instruments is a German company that develops, manufactures, and supplies music software and hardware for music production, sound design, performance, and DJing. The company's corporate headquarters and main development facilities are lo ...

virtual synthesizer for Hammond organ (B-3) sound emulation *

B4-mount The B4 lens mount was standardized in 1992 by the Broadcasting Technology Association (BTA) and is defined in BTA S-1005. This standard defines the physical mount, but also optical properties and some electrical connections. The B4 mount defines ...

, used for professional video cameras such as Betacam * An international standard

paper size Paper size standards govern the size of sheets of paper used as writing paper, stationery, cards, and for some printed documents. The ISO 216 standard, which includes the commonly used A4 size, is the international standard for paper size. I ...

(250×353 mm), defined in ISO 216 * B04,

Alekhine's Defence The Alekhine's Defence is a chess opening that begins with the moves: :1. e4 Nf6 Black tempts White's pawns forward to form a broad , with plans to undermine and attack the white structure later in the spirit of hypermodern defence. White's i ...

chess code * 1. b4,

Sokolsky Opening The Sokolsky Opening (also known as the Orangutan or Polish Opening) is an uncommon chess opening that begins with the move: :1. b4 According to various databases, out of the twenty possible first moves from White, the move 1.b4 ranks ninth i ...

in chess