When the alarm clock was not popular, it was humans who used to wake people up. “Knocker-upper” was an occupation to wake people up.
Knocker uppers used to knock on the windows of bedrooms of workers, which used to be located on the top floor; hence the name.
The original article that inspired this infographic was written by Maryam Merchant. Thanks Maryam, for letting us use your interesting article.
Please check out the original article of this infographic here.
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