Comité Consultatif Internationale de Télégraphique et Téléphonique (Consultative Committee on International Telephone and Telegraph) (CCITT)

CCITT is a technical committee of the International Telecommunications Union, a United Nations organization in Geneva. It sets international communications recommendations concerning standardization of data interfaces, modems, and data networks. ARC/INFO is fully compliant with CCITT Group IV, the Standard for raster data compression. ARC/INFO supports the following TIFF compression schemes: CCITT Group 4 for black-and-white data (read only); CCITT Group 3, one-dimensional encoding for black-and-white data; and PackBits.