C (disambiguation)

C is the third letter in the Latin alphabet.

C or c may also refer to:

STEM

Technology

Computing C (programming language), developed at Bell Labs in 1972 C, the digit with value 12 (number) in hexadecimal C:, or "Drive C", the default drive letter assignment for the default hard drive in DOS and Windows

Electronics

C battery, a size of battery "C" battery, vacuum tube battery used to provide bias to the control grid

Capacitor or C

Measurement °C, Celsius temperature scale c, carat (purity) c, centi-, an SI prefix C, Coulomb, the SI derived unit for electric charge

Science c (IPA), the notation for the voiceless palatal stop in the International Phonetic Alphabet

Medicine

ATC code C or cardiovascular system, a section of the Anatomical Therapeutic Chemical Classification System Haplogroup C (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup Haplogroup C-M130 (Y-DNA), a Y-chromosomal DNA (Y-DNA) haplogroup once called simply C C-value, DNA contained within a haploid nucleus

Biochemistry

Troponin C, one of the three troponins Cytosine, nucleic acid C (or Cys), an abbreviation for the amino acid cysteine

Materials science

Carbon, symbol C, a chemical element Atomic carbon, chemical formula C c, the specific heat capacity of a substance C, capacitance

Physics

, charm quark c, the speed of sound c, the speed of light in vacuum

Astronomy

C, a prefix for astronomical star clusters, which follow the IAU's "Chhmm±ddd" format C, a prefix for astronomical objects listed in the Caldwell catalogue, ranging from C1 to C109

Mathematics c, any constant C, the constant of integration C, the digit meaning 12 (number) in positional numeral systems with a radix of 13 or greater C, in Roman numerals, the symbol for 100 C or , the set of all complex numbers ℭ or , the cardinality of the continuum C, the set of continuous functions C, the combination or "choose" function c space, the space of all convergent sequences in functional analysis

Arts and media

C (TV series), Control: The Money and Soul of Possibility, an anime show created by Tatsunoko Production, broadcast on Fuji TV in 2011 C (plastic toy), (plural: ), from Czechoslovakia, initially used as buckles and in door hangings C, the production code of The Edge of Destruction (AKA Inside the Spaceship), the third Doctor Who serial, broadcast 1964 C, pseudonym for the character Max Denbigh in the 2015 film Spectre

Music C (musical note), and keys based on it: C major C minor C Album, 1999 album by Kinki Kids C (Miho Nakayama album), stylized as 「C」, 1985 "C" (song), stylized as "「C」", 1985 single by Miho Nakayama C (Lucy Bedroque album), 2026 , symbol used to designate common time , symbol used to designate alla breve "C", one of Deux Poèmes de Louis Aragon by Francis Poulenc "C" (Deltarune), a 2025 track by Toby Fox from Deltarune Chapters 3+4 OST from the video game Deltarune c, alternative name for Grimes

Literature Prefix "c", to specify a column number as in-source-locator in old citations C (novel), a novel by Tom McCarthy C, a 1924 novel by Maurice Baring C Magazine, a magazine published by Cardinal Courier Media "C" Is for Corpse, the third novel in Sue Grafton's "Alphabet mystery" series, published in 1986 C-lehti ('C-magazine'), a defunct Finnish computer magazine Codex Ephraemi Rescriptus C (journal), a natural sciences academic periodical published by MDPI

Transportation Line C (disambiguation) including "C line"; used in several public transport systems Mercedes-Benz C-class C, the unofficial designation used by the U.S. Navy classification for Protected Cruisers and Peace Cruisers before the 1920 reclassification Farmall C, a tractor produced by International Harvester from 1948 to 1951

Rail C Train (disambiguation)

NZR C class (1873) train NZR C class (1930) train C, or 0-6-0 classification, a type of locomotive with three powered axles C (Los Angeles Railway) C (S-train) a service on the S-train network in Copenhagen C (New York City Subway service) C Line (Los Angeles Metro) Line C (Buenos Aires Underground) Tokyo Metro Chiyoda Line, a subway service operated by the Tokyo Metro, labeled Chūō Line (Osaka), a subway service operated by the Osaka Metro, labeled RER C, a line in the RER of Paris The official West Japan Railway Company service symbol for: Kusatsu Line Sakai Line

Sport Captain (ice hockey) Catcher, a position in baseball

Military units

C (Glamorgan Yeomanry) Troop C (Kent and Sharpshooters Yeomanry) Squadron C (Rhodesia) Squadron 22 SAS

Other uses C (grade), a satisfactory grade in education Citigroup, Inc.'s stock ticker symbol Caius, a Latin name Center Party (Sweden), a Swedish political party Mansfield Smith-Cumming or C (1859–1923), Chief of the SIS, the UK Secret Intelligence Service, also known as MI6 His successors as Chief of the SIS have since been generally known by his alias, C Dominical letter C for a common year starting on Friday Charlie, the military time zone code for UTC+03:00 C (restaurant), a restaurant in Tampere, Finland

C (disambiguation)

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