What's the difference between UI and UX?

Related questions

1. Which is better UI or UX?
2. Which comes first UX or UI?
3. What does UI UX mean?
4. What do UX designers do?
5. What does a UI designer do?

Tags

1. #stands
2. #closely
3. #while
4. #still
5. #presentation
6. #refers
7. #product
8. #confused
9. #reactions
10. #worry
11. #cosmetics
12. #represents
13. #senses
14. #experience
15. #elements
16. #crucial
17. #together
18. #interface
19. #design