SDNn.交换数字网络；同步数字传输网SDabbr.南达科塔(=South Dakota)SDAS Scientific Data Automation System科学数据自动控制系统SDOC Selective Dynamic Overload Control选择性动态超载控制SDCCH Standard Dedicate Control Channel标准专用控制信道SDH optical fiber communication network光纤SDH传输网SDM Selective Dissemination on Microfiche缩微胶片选择传播SDL Specification and Description Language规格和描述语言SDDF Subscriber Digital Distribution Frame用户数字配线架SDDS Spin Decoupling Difference Spectroscopy自旋去偶差谱SDN Synchronous Digital Transmission Network同步数字传输网络SDCCH Stand-alone Dedicated Control Channel单机专用控制信道