Similar to Linked_Open_Data

Codecademy

CodePlex

Common Gateway Interface

.coop

.cr

Craigslist

.cu

Cuil

.cw

.cx

.cy

.cz

Data URI scheme

Datagram Congestion Control Protocol

Datagram Transport Layer Security

DAViCal

.de

Disqus

DNS zone transfer

.do

.dz

.ec

Empas