C++
CA
Cache
Call Center
Callback
CALS
CAPI
Carrier
CBT
CC
CCITT
CD-MO
CD-ROM
CD-WO
CDA
CDF
CEPT
CERN
CERT
CFD
CFO
CFV
CGI
cgi-bin
CGM
CHAP
Chasque
Chat
chatten
Christiansen-Protokoll
CIDR
CIFS
CinePak
CIS
CL-Netz
clickable Image
Client
Client/Server
Clipper-Chip
CLUT
CMYK
CODEC
COM
Commando
Common Log Format
Compressed HTML
CompuServe
ConflictNet
Content Provider
Cookie
CORBA
CR
Cracker
Crashmail
CRC
CREN
Crippleware
Crossposting
CSLIP
CSMA
CSnet
CSS
CSS2
CTI
CTS
CU-SeeMe
Cyberpunk
Cyberspace