| CCITT | Center for the Commercialization of Innovative Transportation Technology 
| Others |
| CCITT | Comite Consultatif International Telegraphique et Telephonique
| Others |
| CCITT | Comite Consultatif International Telegraphique et Telephonique (Consultative Committee for International Telegraphy And Telephony)
| Others |
| CCITT | Comite Consultatif International Telegraphique et Telephonique (Consultative Committee for International Telephony and Telegraphy)
| Others |
| CCITT | Comite Consultatif International Telegraphique et Telephonique (now ITU-T)
| Others |
| CCITT | Command, Control, and Intelligence Technical Test
| Others |
| CCITT | Communication Club for International Talk and Travel
| Others |
| CCITT | Consultative Committee for International Telegraphy and Telephony
| Others |
| CCITT | Consultative Committee for International Telephone and Telegraph
| Others |
| CCITT | Consultative Committee for International Telephony and Telegraphy
| Others |
| CCITT | Consultative Committee on International Telephony and Telegraph
| Others |