Is PSD lossy or lossless?

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Tags

1. #jpegs
2. #format
3. #image
4. #result
5. #today
6. #photoshop
7. #compression
8. #default
9. #relatively
10. #native
11. #images
12. #lossy
13. #sizes
14. #smaller
15. #viewing
16. #tiffs
17. #significantly
18. #lossless
19. #electronic
20. #contrast