Why is New York City called the Big Apple?

Related questions

1. What will NY minimum wage be in 2019?
2. What is the poorest borough in NYC?
3. Does min wage go up in 2019?
4. Can I live comfortably making 50k a year?
5. Can you buy a house with 40k salary?
6. Is earning 150k a year good?
7. Is Harlem dangerous?
8. What's the most dangerous city in New York?
9. How is New York called the Big Apple?
10. What is New York minimum wage right now?

Tags

1. #sports
2. #nickname
3. #popularity
4. #morning
5. #campaign
6. #known
7. #1920s
8. #company
9. #first
10. #1970s
11. #convention
12. #writer
13. #telegraph
14. #apple
15. #popularized
16. #visitors
17. #gerald
18. #bureau
19. #since
20. #promotional