How did a telegram work?

Related questions

1. Why are Facebook chats going away?
2. Is telegram a social network?
3. Which is more secure telegram or WhatsApp?
4. What is difference between FB and WhatsApp?
5. Can you delete FB and keep messenger?
6. Can I delete Facebook but keep Messenger?
7. Why do we use telegram?
8. What does deactivating Facebook do?
9. What is difference between Instagram and WhatsApp?
10. Is Facebook and Messenger the same?

Tags

1. #shortened
2. #known
3. #often
4. #plain
5. #telegram
6. #message
7. #telegraph
8. #cable
9. #telegrapher
10. #morse
11. #using
12. #printing
13. #submarine
14. #operator
15. #cablegram
16. #electrical