directlydirectly coupled amplifierdirectordirectorydirectory serverdirichletdischargedischarge capacitydischarge circuitdischarge currentdischarge curvedischarge diagramdischarge energydischarge gapdischarge pathdischarge potentialdischarge voltagedischargingdiscolordiscolorationdiscone antennadisconnectdiscontinuitydiscontinuousdiscovery framediscretediscrete circuitdiscrete compnent microcircuitdiscrete convolutiondiscrete devicediscrete fourice transformdiscrete input modulediscrete output modulediscrete timediscrete time systemdiscrete transistordiscrete variablediscrete word intelligibilitydiscriminationdiscriminatordiscriminator transformerdishdisintegrationdisintegration constantdisintegration energydisintegration of atomdisintegration timedisjunctiondiskdisk array