The invention of heavier-than-air flight in the early 20th century (as opposed to the lighter-than-air balloons that had existed for a century prior) led to rapid changes in established ways of doing many things. One of the areas that saw this change was the delivery...
![Shift Change](https://jerryandersonart.com/wp-content/uploads/2022/04/Shift-Change-FI-600x315-3.png)
Shift Change
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