略語大辞典 [MIL] 21 DDN Defense Data Network (アメリカの)国防データ ネットワーク. Defense Data Network; a long-distance communication network for the (US) DCA(Defense Communications Agency); ref. DDN SCC(Security Coodination Center); ref. DDN NIC(Network Information Center); (US); [MIL:C:E]. 丸善「略語大辞典」JLogosID : 11871477