title: C0
text: # 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
  