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『ゆっくりIT雑学帳』情報社会を考えるチャンネル
【ゆっくり解説】NumLockってなんで存在するの？ NumLockの生い立ちを解説
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Janusz
办美国文凭加拿大文凭澳洲文凭英国文凭学位证毕业证成绩单
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Wendy Ye
![[Trivia] The history of the invention of numbers [Slow explanation]](http://i.ytimg.com/vi/S6DUHY_JrrA/mqdefault.jpg "[Trivia] The history of the invention of numbers [Slow explanation]")
![[Slow explanation] How did humans discover numbers? - The invention of numbers -](http://i.ytimg.com/vi/Xv-3HB8b1as/mqdefault.jpg "[Slow explanation] How did humans discover numbers? - The invention of numbers -")
