Betamax
From The Art and Popular Culture Encyclopedia
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Betamax (colloquially termed Beta) is an obsolete home videocassette tape recording format developed by Sony, and released on May 10, 1975. The cassettes contained 1/2 inch (12.7 mm) wide videotape in a design similar to the earlier, professional 3/4 inch (19.05 mm) U-matic videocassette format.
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