B4
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B04
'''B4''' or '''B-4''' may refer to:
* [[Vitamin B4]]
* B4, an international standard [[paper size]] (250×353 mm), defined in ISO 216.
* '''B4 star''', a subclass of B-[[stellar classification|class stars]]
* [[Babylon 4]] space station, the predecessor to the Babylon 5 station from the ''Babylon 5'' television series
* [[B.A.C.H. Flugbetriebs]] IATA airline designator (ICAO '''BCF''')
* [[Bankair]] IATA code, ICAO airline designator ('''BKA''')
* [[Flyglobespan]] IATA airline designator
* [[HMS B4|HMS ''B4'']], a [[British B class submarine|B-class]] submarine of the Royal Navy.
* Internet shorthand for "before"
* The [[Keystone B-4]], a [[United States Army Air Corps]] biplane bomber
* A level of vehicle armour
* [[B-4 (Star Trek)|B-4]], an android in the ''Star Trek'' fictional universe
* [[B4 (music show)]], an early morning pop promo show on Channel 4 TV, produced by [[The Chart Show]]
* [[203-mm howitzer M1931 (B-4)]], a Soviet ordnance piece from [[World War II]]
* B4 or B4 II, virtual synthesizer for [[Hammond organ]] (B-3) sound emulation (product of [[Native Instruments]])
* [[Subaru B4]], the name with which the [[Subaru Legacy]] is marketed in [[Israel]].
* B4 lens mount, a specification of lens mount, use for profession video cameras such as Betacam, and more.
==See also==
* [[B04]], a chess code for Alekhine's Defence
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