Oz (7) - Transition State (2017)

Ottawan - Ottawan 2 (1981)

Ottawan - D.I.S.C.O (1980)

Otis Redding - Dreams To Remember ( The Very Best Of...) (1994)

Osmosis - Osmosis (1970;2017)

Os Mundi (4) - Sturmflut (2008)

Os Mundi (2) - 43 Minuten (1972;2004)

Os Mundi (1) - Latin Mass (1970;2004)

Oscar Benton - I Am Back (2018)

Oscar Benton (1) - Bensonhurst Blues (1981;1999)

Oscar (3) - Cobblestone Heroes (1977;2010)

Oscar (1) - Oscar (1974;2010)

Orange Wedge - No One Left But Me (1974;2008)

Orange Wedge - Wedge (1971;2008)

Orphaned Land (8) - Unsung Prophets & Dead Messiahs (2018)

Open Road - Windy Daze (1971;2010)

Orange Goblin (9) - The Wolf Bites Back (2018)

Opus - Opus 1 (1975;2013)

One - One (1969;2015)

Ohio Express (3,4) - Chewy Chewy & Mercy (1969)

Ohio Express (1,2) - Beg, Borrow And Steal (1967) & Ohio Express (1968)

Ohio Players (4) - Pleasure (1972;2006)

Ohio Players (3) - Pain (1971;2007) USA; Funk,Soul,Smooth Soul,Disco,Pop;

Ofra Haza - Greatest Hits vol.2 (3CD;2004) { Israel; Pop,Synthpop,Jewish Music,Dance-Pop,Mizrahi Music,Israeli Folk Music }

Odin - Odin (1972;1991) { UK/England; Hard/Prog Rock/Heavy Prog/Krautrock }