DS3 PLCP stands for Digital Signal Level 3 Physical Layer Convergence Protocol
DS3-12E stands for Digital Signal Level 3 - 12 (Ports) Enhanced (Cisco)
DS4SI stands for Design Studio for Social Intervention
DS-FP stands for Deferrable Scheduling for Fixed-Priority Transactions
DS2DC stands for Data Server to Data Client (Sisnet transmission protocol)
DS/DD stands for Double Sided/Double Density