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 IATA airline designator (ICAO BCF) * Bankair IATA code, ICAO airline designator (BKA) *

Bensen B-4 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 ...

, Bensen Aircraft autogyro * Bäumer B IV Sausewind, German 1920s sports aircraft * Flyglobespan 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, 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 Bavarian B IVs were early German steam locomotives with the Royal Bavarian State Railways (''Königlich Bayerische Staatsbahn''). The six engines built by Kessler were trialled with a Kessler boiler. This had a pear-shaped cross section and cou ...

, an 1852 German steam locomotive *

GSR Class B4 GSR may refer to: Organizations * Gas Safe Register, in the United Kingdom * Global Sea Mineral Resources, a subsidiary of the dredging company DEME#Global Sea Mineral Resources (GSR), DEME, aimed at exploring the mining of polymetallic nodules ...

, a former Cork, Bandon and South Coast Railway steam locomotive of the Great Southern Railways, Ireland *

LSWR B4 class The London and South Western Railway B4 class is a class of 0-4-0 tank engines originally designed for station piloting and dock shunting. They were later used extensively in Southampton Docks for nearly half a century. Design The locomotives w ...

, an 1891 British dock tank locomotive *

PRR B4 PRR may refer to: * Parietal reach region, of the human brain * Pattern recognition receptor, receptors of the innate immune system that identify pathogen-associated molecular patterns * Pennsylvania Railroad (reporting mark), an American railroad ...

, 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 The Soo Line B-4 class were 0-6-0 steam locomotives constructed for the Minneapolis, St. Paul and Sault Ste. Marie Railway (Soo Line) by the American Locomotive Company. Six (#344–349) were built at their Schenectady plant in 1915, with a furt ...

, an American 0-6-0 steam locomotive *

LB&SCR B4 class } The B4 class were 4-4-0 steam locomotives for express passenger work on the London, Brighton and South Coast Railway. They were designed by R. J. Billinton and were either built at Brighton works 1899–1902 or else by Messrs Sharp, Stewart and ...

, a British tender locomotive

Automotive uses

* Subaru B4, the name under which the Subaru Legacy 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, 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 * Keystone B-4, 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

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 * Leukotriene receptor The leukotriene (LT) receptors are G protein ...

and Leukotriene B4 receptor 2, two human genes * Lipoxin B4, a lipoxin *

Proanthocyanidin B4 Procyanidin B4 is a B type proanthocyanidin. Procyanidin-B4 is a catechin-(4α→8)-epicatechin dimer. It is found in the litchi pericarp, in grape seeds, and, along with 4-cis-isomer of procyanidin B4, in beer.

, 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 stellar spectrum, spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a Prism (optics), prism or diffraction grati ...

In entertainment

* ''B4'' (music show), a defunct British music video show broadcast on Channel 4 *

B4 (TV channel) Flava was a British hip-hop music television channel owned and operated by Sony Pictures Television. It was launched in June 2004 and was formerly called B4 TV, a previous pre-launch music channel from CSC Media Group. Flava broadcast for 24 h ...

, a defunct British music television channel *

B-4 (Star Trek) B4, B04, B.IV or B-4 may refer to: Transportation Aviation * Auster B.4, 1951 British light transport aircraft with rear ramp * B.A.C.H. Flugbetriebs IATA airline designator (ICAO BCF) * Bankair IATA code, ICAO airline designator (BKA) * Bens ...

, an android in the ''Star Trek'' fictional universe * Babylon 4 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) B4 is a blind sport classification used in a variety of sports including sailing, bowls, swimming, and cycling. Unlike other blind sport classes, it only uses visual acuity for the purpose of being classed into it. Definition This is a medical cla ...

, a parasports classification for visually impaired athletes * B4 ''Street Fighter'' Championships, a 2000 fighting game tournament * B4 or B4 II, a Native Instruments 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 (250×353 mm), defined in ISO 216 * B04, Alekhine's Defence 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 ...

in chess