[1] Central Arbitration Control - zentralgesteuerter Buszugriff

[2] Customer Access Connection (local loop)

[3] Commercial Action Committee (CEPT)

[4] Central Arizona College (USA, http://www.cac.cc.az.us/)

[5] Calling-card Authorization Center

[6] Carrier Access Code

[7] Circuit Administration Center

[8] Customer Administration Center

[9] Cascavel, Brazil - internationale Fughafen-Kennung.