Queueing theory originated in the early 20th century, beginning with the research on telecommunications system by Danish telecom engineer A. K. Erlang. After that, it gradually developed into a very mature form of theory with strong practical usage and value. 排队论起源于20世纪初丹麦电信工程师Erlang对电信系统的研究,之后逐渐发展成为一门比较成熟的理论学科分支,并且得到了越来越多的研究。