[April 24th, 1921] The 1st calculating machine competition was held on April 24, 1921 at Magic City, rue de l'Université. Out of 15 competing brands and 60 competing operators, almost all of the top prizes were won by the Comptometer machine and its operators.
from /r/100yearsago
1921年4月24日] 第一届计算机竞赛于1921年4月24日在大学路的魔术城举行。在15个竞争品牌和60名竞争操作员中，几乎所有的最高奖项都是由Comptometer机器及其操作员获得的。