Logo Brand Number of cassettes
in catalog 		Year
O.X 1
OKI 1
ONPA 18 1990 - 1990
ONSTAR 1
ORWO 23 1972 - 1989
OTC 1 1980 - 1980
OTTO 3
Oceanic 2
Odakyu 4 1975 - 1975
Odeon 1
Ogaton 1
Okura 1 1986 - 1986
Olmark 3 1986 - 1986
Olympia 3 1977 - 1977
Olympiade 76 4 1976 - 1976
Olympic 1 1976 - 1976
Omega 3
Omega Sound 2
Omicron 1
Onix 2 1978 - 1978

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