CIAO


 * Component-Integrated ACE ORB, a CORBA Component Model (CCM) implementation
 * CIAO: Columbia International Affairs Online, an electronic database from Columbia University Press
 * CIAO (AM): Radio station at 790 kHz in Brampton, Ontario
 * CHLO (AM): Radio station at 530 kHz in Brampton, Ontario, that once held the CIAO call sign