WONDER #2340: When were ZIP Codes Invented?

Question 1 of 3

What evidence shows that ZIP codes were widely used soon after their invention?

1. “Today, the USPS requires ZIP codes on all mail.”
2. “By 1969, 83% of Americans used ZIP codes.”
3. “They thought the ZIP code was dehumanizing, turning people into numbers.”
4. “In 2018, USPS shipped over 146 billion pieces of mail.”

Question 2 of 3

What event caused USPS to lose many of its experience mail carriers?

1. The American Revolution
2. World War II
3. The Cold War
4. The Vietnam War

Question 3 of 3

According to this Wonder, the original ZIP code was created by...

1. Robert Moon
2. Mary Fields
3. Susanna Brunner
4. Theodore Roosevelt

Check your answers online at https://wonderopolis.org/wonder/When-Were-ZIP-Codes-Invented.