C0
# C0

C0 or C00 has several uses including:

* C0, the IATA code for Centralwings airline
* C0 and C1 control codes
* a CPU power state in the Advanced Configuration and Power Interface
* an alternate name for crt0, a library used in the startup of a C program
* in mathematics:
   * the differentiability class $C^0$
   * a $C_0-semigroup,$ a strongly continuous one-parameter semigroup
   * $c_0,$ the Banach space of real sequences that converge to zero
   * a $C_0$ field is an algebraically closed field
* in physics, $c_0,$ the speed of light in vacuum
* %C0, the URL-encoded version of the character "À"
* C0, a note-octave in music
* an ISO 216 paper format size
* C00, the ICD-10 code for oral cancer
* C° could refer to:
   * An abbreviation for Celsius degrees
   * In chemistry, the standard state for solute concentration
