The Cantata 700 is a commercial background music system and corresponding tape cartridge format developed by 3M that was in common use from 1965 until the 1990s. == Cartridge == The nearly square-shaped cartridges are among the largest built.
The Cantata 700 is a commercial background music system and corresponding tape cartridge format developed by 3M that was in common use from 1965 until the 1990s. == Cartridge == The nearly square-shaped cartridges are among the largest built.
Source: Wikipedia "Cantata 700" · CC BY-SA 4.0
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