What are the components of a queuing system?
排队系统的组成部分有哪些？
A queuing system consists of three main parts, which are as follows: To-Do List Upon Arrival Mechanical means of service Discipline in the queue.
排队系统由三个主要部分组成，如下所示： To-Do List On Arrival 机械服务方式 排队纪律。