有向邏輯關係 directed logical relation有向網 directed net有向捨入 directed rounding有向選路 directed routing受控掃瞄 directed scan有向語意圖 directed semantic graph，DSG有向集合 directed set有向樹 directed tree導向字元 directing character導向碼 directing code導引站，導向站 directing station，DS方向，流向 direction測向器 direction finder，DF測向 direction finding，DF方向旗標 direction flag方向流 direction flow方向key direction key定向天線 directional antenna定向耦合器 directional coupler，DC定向過濾器 directional filter定向麥克風 directional microphone指引，導引，指令，宣告 directive指引參數塊，指令參數塊