O

1. Opeth
2. Orphaned Land
3. Osbourne Ozzy
4. OOMPH
5. Output
6. Onmyo-Za
7. Oasis
8. Orishas
9. Overkill
10. Operation Ivy
11. Offspring The
12. Orff Carl
13. Onose Jun
14. Orbison Roy
15. Octavia
16. Ona
17. Orgy
18. Osborne Joan
19. Ozz82
20. Overload
21. Ondes Negatives Les
22. Oldfield Mike
23. One Dollar Short
24. Omega
25. Obituary
26. Osny
27. Our Lady Peace
28. Otep
29. Otro Yo El
30. Orcblood
31. Obus
32. Old Mans Child
33. Obliveon
34. Oversoul
35. Orange Seabones
36. Offspring
37. Osker
38. Overflow
39. Old Dead Tree The
40. October Falls
41. Otherwise
42. Ossian
43. Obsidio
44. Ocean Colour Scene
45. Otm Shank Jazz Quintet The
46. Obrint Pas
47. Olsson Sven
48. Oginskiy
49. Oficina G3
50. Opiosos Os
51. Orchestral Manoeuvres In The Dark Omd
52. Ostria Marcelo
53. Obligation Or Reputation
54. Oleander
55. Osvajaci
56. Oxidus
57. Obispo Pascal
58. Ozric Tentacles
59. Outlaw Torn The
60. Oleyire
61. Office Of Strategic Influence
62. Osmi Putnik
63. Oreja De Van Gogh La
64. Old Man Willow
65. Ogres De Barback Les
66. Offenbach Jacques
67. October Thorns