What is the difference between Raspberry Pi models?

Related questions

1. What is the point of a Raspberry Pi?
2. Does Raspberry Pi 2 have WIFI?
3. How does a Raspberry Pi work?
4. What does Pi Raspberrypi mean?
5. Can you run a Minecraft server on a Raspberry Pi?
6. How powerful is a Raspberry Pi?
7. Can you host a website on a Raspberry Pi?
8. Can I use a Raspberry Pi as a server?
9. What is Raspberry Pi used for?
10. How much RAM does Raspberry PI 3 have?

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14. #armv7
15. #while
16. #chipset
17. #difference
18. #falls
19. #processor
20. #carry