| Acronym | Definition |
|---|
| CCITT | Comite Consultatif International de Telegraphique et Telephonique (International Telegraph and Telephone Consultative Committee) [now ITU-T] |
| CCITT | Consultative Committee for International Telephone and Telegraph |
| CCITT | Consultative Committee for International Telegraphy and Telephony (US Government; less common) |
| CCITT | Consultative Committee for International Telephony and Telegraphy |
| CCITT | Consultative Committee on International Telephone and Telegraph (International Telephone and Telegraph Union) |
| CCITT | Consultative Committee International Telephone and Telegraph (est. 1956; now International Telecommunication Union-Technical) |
| CCITT | Consultative Committee on Innovation and Technology Transfer (EU) |
| CCITT | Command, Control, and Intelligence Technical Test |