CL

= CaLl,调用，呼叫;

= Calling Line, 呼叫线;

= Cancel, 取消，删除;

= Central Line, 中心线，中央通信线路;

= CLear, 清除;

= Closed Loop, 闭环;

= CoLumn, 列，纵行;

= Command Language, 命令语言;

= Compare Logic, 比较逻辑;

= Compiler Language, 编译程序语言