Why is EWR the code for Newark?

Related questions

1. Which is the best airport to fly into New York City?
2. What airport code is BNA?
3. Is Newark in New York or New Jersey?
4. Is Newark far from New York City?
5. Do NYC cabs go to Newark airport?
6. Where is the Airtrain at Newark airport?
7. How much does it cost to get from Newark to Manhattan?
8. What is the difference between Newark and New York?
9. Why is the airport code for New Orleans MSY?
10. What airport code is SDF?

Tags

1. #liberty
2. #station
3. #navel
4. #letter
5. #because
6. #believe
7. #airport
8. #newark
9. #policy
10. #before
11. #international
12. #reserved
13. #first
14. #origin