Similar to 商品検索サイト

Common Gateway Interface

.coop

.cr

Craigslist

.cu

.cw

.cx

.cy

.cz

Data URI scheme

Datagram Congestion Control Protocol

Datagram Transport Layer Security

DAViCal

.de

Disqus

DNS zone transfer

.do

.dz

.ec

Enterprise 2.0

.er

.es

.et