What is a London Oyster card for tourist?

Related questions

1. Does London Pass include Oyster card?
2. Is Oyster cheaper than contactless?
3. Is contactless same as oyster?
4. What happens if I lose my Oyster card?
5. What are the odds of finding a pearl in an oyster?
6. How do I get my Oyster card deposit back?
7. Why then the world is mine oyster?
8. What does the metaphor the world is your oyster mean?
9. How do oysters produce pearls?
10. Do Oyster cards expire?

Tags

1. #credit
2. #automatically
3. #public
4. #oyster
5. #smartcard
6. #travel
7. #zones
8. #network
9. #transport
10. #cheapest
11. #visitor
12. #which
13. #valid
14. #london
15. #journeys
16. #calculates
17. #total
18. #carries
19. #single
20. #contactless