The inventor of the pin code shortened it to 4 digits because his wife couldn't remember more

 
The inventor of the pin code shortened it to 4 digits because his wife couldn't remember more - Pin, ATM, Inventions, Humor, GIF, Longpost, Yandex Zen
The inventor of the pin code shortened it to 4 digits because his wife couldn't remember more - Pin, ATM, Inventions, Humor, GIF, Longpost, Yandex Zen

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