• 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

See also

• Ciao (disambiguation)