C (disambiguation)

C is the third letter in the Latin alphabet.

C may also refer to:

Computing

• C (programming language), developed at Bell Labs in 1972
• C++, an object oriented programming language based on C
• Objective-C, an object oriented programming language based on C, while available on various platforms, used mainly on Mac OS X
• C# (programming language), developed at Microsoft in 2001
• C (digit), a hexadecimal digit
• C (magazine), a defunct Finnish computer magazine
• Control-C, a keyboard control code
• 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 MS-DOS, PC-DOS, and Microsoft Windows.

Technology

• C battery (size)
• C battery (type), grid bias battery for vacuum tube radios
• A battery charger rate or discharge rate equal to the capacity of a battery divided by 1 hour. For example C for a 1600 mAh battery would be 1600 mA (or 1.6 amps). 2C is twice this rate and 1/2C is half the rate.
• C-clamp, a type of fastener
• C band, radio frequency band from 4 GHz to 6 GHz
• C, the standard abbreviation for an electronic capacitor, used e.g. in circuit diagrams

Science

• Vitamin C
• Haplogroup C (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup
• Haplogroup C (Y-DNA), a Y-chromosomal DNA (Y-DNA) haplogroup
• ATC code C Cardiovascular system, a section of the Anatomical Therapeutic Chemical Classification System
• C1 to C7, symbols for cervical vertebrae
• C, chemical symbol for the element carbon
• C, a prefix for astronomical objects listed in the Caldwell catalogue
• c, the speed of light in a vacuum
• c, the speed of sound
• c, the specific heat capacity of a substance
• c, any constant (mathematics)
• Cytosine, nucleic acid
• C, capacitance
• C, symbol of coulomb
• Cysteine

Transportation

• Line C (disambiguation) used in several public transport systems
• NZR C class (1873) train
• NZR C class (1930) train
• C, or 0-6-0 classification, a type of locomotive with three powered axles

Symbols

• ©, copyright
• ¢, cent

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 or $\mathbb{C}$, the set of all complex numbers
• ℭ or $\mathfrak c$, the cardinality of the continuum
• C, the set of continuous functions
  • $C^0, C^1, C^2, \dots, C^\infty$, differentiability classes
• In probability theory, the combination or "choose" function, uses the notations
  C(n,k) , $C_k^n$ ,ⁿC_k , _nC_k , or ${n \choose k}$.

Measurement

• c., or circa, an approximate date or other value
• °C, degrees Celsius
• C, for carat (purity)
• c, centi-, an SI prefix
• C, coulomb, the SI derived unit for electric charge
• c, cup (unit), a unit of volume

Music

• C (musical note), and keys based on it:
  • C major
  • C minor
  • C-sharp major
  • C-sharp minor
• , symbol used to designate common time
• , symbol used to designate cut time

People

• C, alias for Mansfield Smith-Cumming (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., Roman abbreviation for Gaius

Sport

• Centre position in Australian rules football
• The captain (ice hockey) is the player who wears a "C" on his jersey
• In baseball, "C" is an abbreviation for catcher
• Several sports have "C" as an abbreviation for center
• In some sports, (C) after the name can designate either the captain or the coach

Other uses

• C, a book by Tom McCarthy (writer) shortlisted for the 2010 Man Booker Prize
• C (plastic toy), a plastic toy from former Czechoslovakia.
• C (grade), a satisfactory grade in education.
• Citigroup, Inc. Stock Symbol for Citigroup.
• C, the NYSE ticker for Grupo Financiero Banamex.
• [c], the IPA's symbol for the voiceless palatal plosive.
• C (anime), an anime by Tatsunoko Production, Fuji TV

See also

• Class C (disambiguation)
• C class (disambiguation)
• Sea (disambiguation)
• See (disambiguation)
• All pages beginning with "C"
• All pages with titles containing "C"
• Prefix disambiguation: CA, CB, CC, CD, CE, CF, CG, CH, CI, CJ, CK, CL, CM, CN, CO, CP, CQ, CR, CS, CT, CU, CV, CW, CX, CY, CZ