English abbreviations from ddn to ddra
- DDN (U.S. Defense Data Network)
- DDNL (dual det. neutron life log)
- DD. NN. (Dominis Nostris ("To Our Lords"))
- DDO (Deputy Director of Operations)
- DDOC (USTRANSCOM (United States Transportation Command) Deployment and Distribution Operations Center)
- DDOJSIOC (Deputy Director of Joint Special Inter-Operational Command)
- DDOOH (Dave Dravecky's Outreach Of Hope)
- DDOP (Delectable Day Of Play)
- DDoS (Distributed Denial of Service)
- DDP (Danish Design Prize)
- DD-PATH (Decision-to-Decision Path)
- DDPS (Desktop Digital Photogrammetry System)
- DDPT (drill data plot log)
- DDR (Radar Picket Destroyer)
- DDR&E ((U.S.) Defense Department Research and Engineering)
- DDRA (Decatur Downtown Redevelopment Authority)