C (disambiguation)

C is the third letter in the Latin alphabet

C may also refer to:

Computing

* C (programming language), invented at Bell Labs in 1972
* C++, an object oriented programming language based on C
* C# (programming language), invented 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.

Technology

* C battery (size)
* C battery (type), grid bias battery for vacuum tube radios
* Battery charging rate. Signifies a charge 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

cience

* Vitamin C
* Haplogroup C (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup
* Haplogroup C (Y-DNA), a Y-chromosomal DNA (Y-DNA) haplogroup
* C1 to C7, cervical vertebrae
* C, chemical symbol for 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 of a substance
* Cytosine, nucleic acid
* "C", Capacitance

Transportation

*C (New York City Subway service)
*C (S-train), Copenhagen
*NZR C class (1873) train
*NZR C class (1930) train
* C, or 0-6-0 classification, a type of locomotive with three powered axles

ymbols

* ©, copyright
* ¢, cent

Mathematics

* 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

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

People

* C, alias for Mansfield Smith-Cumming (1859-1923), Chief of the SIS, the UK Secret Intelligence Service, also known as MI6

Other uses

* C (musical note)
* C (plastic toy), a plastic toy from former Czechoslovakia
* C (grade), a satisfactory grade in education
* Citigroup, Inc. Stock Symbol for Citigroup.
* Centre position in Australian rules football

ee also

* Class C
* C class

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