C2000 C7 Calling Line Identification Call sign Camel Carrier Select Carrier PreSelect CB CBC CBE C-band ccTLD CDMA CDMA450 CDMA2000 cdmaOne CEIR Cel Cell Broadcast Cellulair netwerk CEPT CGC CGI Churn CIF Circuit geschakeld CLI CLIP CLIR Coax Codec Codering COFAM COFDM Compressie Conditional Access Cookie Cordless Telephony Cospas-Sarsat Country code TLD CPM CPS Crawler Cryptografie CSMA CSMA/CD CSS (DVD) CSS (Cascading Style Sheet) CT.0 CT.1 CT.2 CTCSS CT-scan