How many letters are in a tweet?

Related questions

1. Is Twitter more popular than Facebook?
2. What is Twitter and how does it work?
3. What is twitter best for?
4. How do I use twitter app on iPhone?
5. Why is it called twitter?
6. Why did twitter block my account?
7. How long do twitter accounts get suspended for?
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9. Does FB own twitter?
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Tags

1. #limit
2. #supports
3. #tuesday
4. #languages
5. #users
6. #tweets
7. #tweet
8. #almost
9. #announced
10. #doubling
11. #company
12. #characters
13. #twitter