CJD can mean:
Cjdns is a networking protocol, a system of digital rules for message exchange between computers. The philosophy behind cjdns is that networks should be easy to set up, protocols should scale up smoothly and security should be ubiquitous.
CJDL-FM is an FM radio station licensed to Tillsonburg, Ontario which broadcasts at 107.3 FM.
CJDC-TV is a CTV Two owned-and-operated television station in Dawson Creek, British Columbia, Canada. It broadcasts an analogue signal on VHF channel 5 from a transmitter near 233 Road in Peace River.
The CJD Christophorusschule Königswinter is a state recognized private, alternative school located in Rhein-Sieg-Kreis (North Rhine-Westphalia, on the border to Rhineland-Palatinate), and is run by the Christliches Jugenddorfwerk Deutschlands (Christian Youth Village Foundation of Germany – CJD).
CJDV-FM is a Canadian radio station broadcasting at 107.5 FM in Kitchener, Ontario owned by Corus Entertainment.
CJDC is a Canadian radio station, broadcasting at 890 AM in Dawson Creek, British Columbia. The station, owned by Bell Media, airs a country music format.
CJDJ-FM is a Canadian radio station, broadcasting at 102.1 FM in Saskatoon, Saskatchewan. The station, owned by Rawlco Communications, broadcasts an active rock format as Rock 102. It shares studio space with sister stations CFMC and CKOM at 715 Saskatchewan Crescent West, also the home of Rawlco Radio's Corporate Offices.
CJDM-FM is a French-language Canadian radio station located in Drummondville, Quebec.
CJDS-FM is a community radio station that operates at 94.7 FM in Saint-Pamphile, Quebec, Canada.