Umatic BVU(1982): Largely used in high-end consumer and professional equipment.
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Umatic(1971): The initial tape used by Sony to record video.
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The introduction of Umatic BVU spelled the end of 16mm film recordings.
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Umatic(1982): An experiments overhaul was made
to Umatic to record digital video, but this was impractical and the tapes were used as a transport for digital audio only.