Before the age of alarm clocks, there was a job known as the "knocker up" where a man would tap on someones window with a long pole until they were awake. Often factories would hire men to ensure they made it to the knocker up position on time.
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Before the age of alarm clocks, there was a job known as the "knocker up" where a man would tap on someones window with a long pole until they were awake. Often factories would hire men to ensure they made it to the knocker up position on time.
Source