"The origin of queueing theory dates back to 1909, when Agner Krarup Erlang (1878–1929) published his fundamental paper on congestion in telephone traffic [for a brief account, see Saaty (1957), and for details on his life and work, see Brockmeyer et al. (1948)]." -- https://www.sciencedirect.com/topics/engineering/queueing-th...
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I believe it's neither:
"The origin of queueing theory dates back to 1909, when Agner Krarup Erlang (1878–1929) published his fundamental paper on congestion in telephone traffic [for a brief account, see Saaty (1957), and for details on his life and work, see Brockmeyer et al. (1948)]." -- https://www.sciencedirect.com/topics/engineering/queueing-th...