A B C D E F G H I L M N O P Q R S T U V W X Y Z

CCITT - International Telegraph and Telephone Consultative Committee (after the French)

CCP - Compression Control Protocol (PPP suite)

CHAP - Challenge Handshake Authentication Protocol (PPP suite) 

CIF - Cells in Frames (ATM over LAN)

COPS - Common Open Policy Service

CTERM - Command Terminal (DECnet)