B (disambiguation)

B is the second letter of the Latin alphabet.

B may also refer to:

Science and technology

• B battery, a battery used to provide the plate voltage of a vacuum tube
• Haplogroup B (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup
• Haplogroup B (Y-DNA), a Y-chromosomal DNA (Y-DNA) haplogroup
• B, Blood type
• ATC code B Blood and blood forming organs, a section of the Anatomical Therapeutic Chemical Classification System
• Boron, a chemical element
• B, B+ and B-, expressions of buoyancy in convective available potential energy
• Bulb (photography), a shutter-speed setting
• B horizon, a layer of soil commonly known as subsoil
• Vitamin B
• Dominical letter B for a common year starting on Saturday
• Hepatitis B

Astronomy

• B, abbreviation for astronomical objects in the Barnard list of dark nebulae
• b represents latitude in the galactic coordinate system

Symbols for physical and chemical quantities and units

• one of the reciprocal lattice vectors (b*)
• breadth (b), see length
• impact parameter (b)
• molality (b)
• barn (unit) (b), a unit of area
• magnetic field (B)
• napierian absorbance (B)
• rotational constant (B)
• second virial coefficient (B)
• susceptance (B)
• boolean domain ($\mathbb {B}$), mathematics

Music

• Beyoncé, also known by the name B
• B (musical note)
• B major, a scale
• B minor, a scale
• B major chord, Chord names and symbols (popular music)
• B (I Am Kloot album), a compilation album by I Am Kloot
• B (Battles EP), an extended play by Battles
• b (Moxy Früvous EP), an extended play by Moxy Früvous
• ♭ Flat (music), a note lower in pitch by a semitone
• "b", an Iamamiwhoami song
• "B", a song by Todrick Hall from his 2018 album Forbidden
• Charly B (born 1981), the stage name of reggae singer-songwriter Charles Blanvillain
• B, member of Superorganism (band)

Computing and internet

• B (programming language)
• /b/, a board on 4chan
• B-Method, for computer software development
• B-tree, a data structure
• Bit (b)
• Byte (B)
• <b></b>, an HTML element denoting bold text

Linguistics

• b, the symbol used in the International Phonetic Alphabet for the voiced bilabial stop
• В, a letter of the Cyrillic alphabet

Media

• b (newspaper), a free daily, tabloid sized newspaper, published by The Baltimore Sun
• Rajawali Televisi, previously name B Channel, Television in Indonesia
• B, the production code for the 1963–64 Doctor Who serial The Daleks
• "B" Is for Burglar, the second novel in Sue Grafton's "Alphabet mystery" series, published in 1985

Sport

• Australian rules football positions#Full back, in Australian Rules football
• B, often used after the name of football clubs to denote a reserve team

Transportation

• B (New York City Subway service)
• B Line (Los Angeles Metro)
• Line B (Buenos Aires Metro)
• B (S-train), in Copenhagen
• RER B, a line in the RER of Paris
• B, abbreviation for Bundesstraße (federal highway) in Austria and Germany
• Bayshore Route of Shuto Expressway in Japan, numbered as route B

Other uses

• Belgium, on the vehicle registration plates of the European Union
• B (grade), for evaluation of students' work
• Codex Vaticanus Graecus 1209, an ancient bible
• Barnabites (Template:Lang-la), a religious order abbreviated to the postnominal B.
• B (bank), a banking brand in the United Kingdom
• Bucharest, on the vehicle registration plates of Romania
• Bravo, the military time zone code for UTC+02:00

See also

• Decibel, one tenth of a bel (B)
• B postcode area (United Kingdom)
• B., the abbreviation for the Roman cognomen Brutus
• B class (disambiguation)
• Class B (disambiguation)
• B1 (disambiguation)
• B2 (disambiguation)
• Be (disambiguation)
• Bea (disambiguation)
• Bee (disambiguation)
• Bet (disambiguation)
• Beta (disambiguation)
• BB (disambiguation)
• BBB (disambiguation)
• Plan B (disambiguation)