What is meant by WhatsApp?

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Tags

1. #messenger
2. #service
3. #facebook
4. #alternative
5. #messaging
6. #whatsapp
7. #system
8. #computer
9. #instant
10. #brian
11. #acton
12. #internet
13. #definition
14. #major
15. #founded
16. #smartphones
17. #owned
18. #wholly