Dial Central Office自动电话总局 Duty Cycle Output责任循环结果 Director Combat Operations (USAF)导演战斗(美国空军) Data Conversion Operator数据转换操作 Drive Configuration Overlay (hard disks)配置叠加(硬盘) Document Change Off-Line文件改变线 Director Of Christian Outreach主任。基督教 Domino Collaboration Objects (Lotus Notes/Domino COM interface)合作对象(lotusnotes多米诺骨牌COM接口)/ Dues Check Off (union working dues deducted from employees checks)看完会费(扣除雇员工会工作会费,并检查) Defence Community Organisation (Australia)国防社区组织(澳大利亚) Director Controller指挥仪 Dyschondrosteosis软骨骨生成障碍 Digital Central Office数字中心电话局 defense coordinating officer (DOD)国防部官员(如国防协调) District Coordination Officer地区协调官