O

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