C (disambiguation)

C is the third letter in the Latin alphabet.

C or c may also refer to:

Computing

C (programming language), developed at Bell Labs in 1972
C, a hexadecimal digit
C, a computable function, the set of all computable decision problems
C:, or "Drive C", the default drive letter assignment for the default hard drive in DOS and Windows

Measurement

Circa, an approximate date or other value
Celsius
Carat (purity)
centi-, an SI prefix
Coulomb, the SI derived unit for electric charge
Cup (unit), a unit of volume

Science

Carbon or C
Atomic carbon or C
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
Cytosine, nucleic acid
Cysteine
C, a prefix for astronomical objects listed in the Caldwell catalogue, ranging from C1 to C109
C, a prefix for astronomical star clusters, which follow the IAU's "Chhmm±ddd" format
c, the speed of light in a vacuum
c, the speed of sound
c, the specific heat capacity of a substance
c, any constant
C, capacitance
C, symbol of coulomb
Charm quark (
c
)

Technology

C battery, a size of battery
Capacitor or C
C battery, a type of battery for vacuum tube radios
C or C-rate, a rate of charge and discharge of a battery

Mathematics

C, a digit meaning twelve in hexadecimal and other positional numeral systems with a radix of 13 or greater
C, the constant of integration
C, in Roman numerals, the symbol for 100
C, ℂ, or $\mathbb {C}$ , the set of all complex numbers
ℭ or ${\mathfrak {c}}$ , the cardinality of the continuum
C, the set of continuous functions
The combination or "choose" function
c space, the space of all convergent sequences in functional analysis

Music

C (musical note), and keys based on it:
- C major
- C minor
C Album, an album by Kinki Kids
C major chord, a chord in popular music
, symbol used to designate common time
, symbol used to designate alla breve
"C", a composition by Francis Poulenc, one of Deux Poèmes de Louis Aragon

Literature

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

Transportation

NZR C class (1873) train
NZR C class (1930) train
C, or 0-6-0 classification, a type of locomotive with three powered axles

Sport

Captain (ice hockey)
Catcher, a position in baseball

Other uses

С, a letter of the Cyrillic alphabet
C (anime), by Tatsunoko Production, Fuji TV
C (grade), a satisfactory grade in education
C (plastic toy), a plastic toy from former Czechoslovakia
Citigroup, Inc.'s stock ticker symbol
Gaius or C
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
c (IPA) in the International Phonetic Alphabet (IPA), the voiceless palatal stop
Dominical letter C for a common year starting on Friday
C, the production code for the 1964 Doctor Who serial The Edge of Destruction
Charlie, the military time zone code for UTC+03:00
c, alternative name for Grimes

gollark: Liquid RAID? Is that some new RAID software or something?

gollark: A RAID10 array of SSDs is the way to go.

gollark: <@169181866451140610> Also, M.2 SSDs can use SATA like regular 2.5" ones or NVMe. M.2 doesn't automatically mean faster.

gollark: <@175686996461617162> OC already has event.listen.

gollark: I'm hoping that the PinePhone or Librem 5 or some other GNU/Linuxy phone will be released before I need to replace my current one, personally.